On November 11, 2025 the sky erupted with a swath of red Northern Lights seen over much of North America.
It is rare when those living at southerly latitudes can see Northern Lights. Instead of having to travel north to Arctic sites, the aurora comes south to them. That’s what happened on November 11, 2025 when one of the largest solar storms in recent years brought the aurora down over much of the North America.
This was the latest in a set of wonderful aurora shows we’ve enjoyed in the last two years, as the Sun reached the peak of its 11-year cycle of activity.
As I show below, the apps and indicators were registering extreme conditions, with the “Kp Index” peaking at 8 out of a maximum of 9, and the auroral “Ovation” oval lighting up red, indicating a major geomagnetic storm was underway. In the lingo of the local Alberta Aurora Chasers Facebook group, it was most definitely a “pants on” night!
Kp 8! Red Alert!
The source of the storm was two major flares on the Sun in quick succession. In only a day the high-speed “coronal mass ejections” they had unleashed reached Earth and lit up the sky.
As a result the ring of aurora borealis which usually circles the Arctic moved down over southern Canada and the northern United States. I was under that ring of lights!
This is a blend of two exposures, for sky and ground, both 8 seconds at f/2.8 with the TTArtisan 11mm full-frame fish-eye lens on the Canon R5 at ISO 1600.
As it got dark this night, large swaths of red were easily visible to the eye, especially to the northwest as above, and below.
A single 5-second exposure at f/2.8 with the TTArtisan 11mm lens on the Canon R5 at ISO 1600.
Early on a large curtain of red extended across the sky, from northwest to southeast. It is rare to see bright reds with the eye, and unusual to see the reds so extensive and sky-spanning.
This 360ยบ panorama is a stitch of 6 segments, 60ยบ apart, each 5-second exposures at f/2.8 with the TTArtisan 11mm full-frame fish-eye lens on the Canon R5 at ISO 1600, and in landscape orientation.
The reds are mostly from oxygen atoms, but can also come from nitrogen molecules, which require the input of a lot of energy to get excited and glow! They certainly were this night.
The reds mixed with the more common green light from oxygen to produce shades of yellow and orange, and with blues from nitrogen to produce vivid pinks and magentas. While the eye could see some of these subtle colours, a camera (with its longer exposure and wider aperture lens compared to the human eye) was best for picking up the full range of what this show had on display.
This 360ยบ panorama is a stitch of 10 segments, 36ยบ apart, each 4-second exposure at f/2.8 with the Laowa 10mm rectilinear wide-angle lens on the Nikon Z8 at ISO 1600, and in portrait orientation.
The panorama above taken about 2 hours after the previous all-sky scene, shows a quieter aurora but still with curtains covering the sky and converging to the “magnetic zenith,” a little south of the point straight overhead.
Such an all-sky show of aurora is among the sky’s finest spectacles.
A real-time video with the Nikon Z6III at ISO 25600 and Viltrox 16mm lens at f/1/8.
In the video above taken early in the evening I pan around the horizon over the full 360ยบ to take in the scene much as the eye did see it. Video uses shorter exposures more like the eye does. I narrate the video at the camera.
All single 4-second exposures at f/2.8 with the Laowa 10mm rectilinear wide-angle lens on the Nikon Z8 at ISO 1600.
When the aurora covers the sky it’s hard to take it all in and capture it on camera. The 10mm ultra-wide lens I used for the images above sweep up well past the zenith to show the converging curtains, forming shapes that kept changing by the minute.
In the video below I used the same lens with the camera turned to portrait orientation to create a “vertical video,” again narrated at the camera. It shows how the aurora was changing, but slowly this night. It did not have the rapid dynamics I’ve seen with other bright displays, despite the obvious high energies involved here to excite the reds.
Real-time video with the Laowa 10mm lens at f/2.8 and Nikon Z8 at ISO 25,600 & 1/4 second shutter.
Again, this real-time video captures the scene much as the unaided eye saw it. I’ve not processed either of these real-time videos, other than what the camera itself did.
This is a panorama of 12 segments, each 1 second at f/1.8 with the Viltrox 16mm lens on the Nikon Z6III at ISO 1600. Stitched in Adobe Camera Raw.This is a stitch of 6 segments, 60ยบ apart, each 4-second exposure at f/2.8 with the TTArtisan 11mm full-frame fish-eye lens on the Canon R5 at ISO 1600, in landscape orientation. Stitched in PTGui.
On a night like this, I try to shoot not only single still images and videos, but also multi-image panoramas, such as the circular images earlier and these two rectangular “panos” above. Both cover a full 360ยบ in width but don’t go up to the zenith.
Again, they record the range of colours that were on show on this Kp8 night, which were more visible and extensive than usual for an all-sky display.
I also shot two time-lapse sequences. These form the main visuals for this edited music video I produced around the time-lapses.
The link takes you to my Vimeo channel to watch the video. Do enlarge it to full screen!
A single 2.5-second exposure at f/1.8 with the Viltrox 16mm lens on the Nikon Z6III at ISO 1600.
I also always try to take some selfies at every great aurora show, with me often lit just by aurora light! They’re fun to use for talks and “bio pix.”
This is a single 4-second exposure at f/2.8 with the Laowa 10mm lens on the Nikon Z8 at ISO 1600.
As a final bonus this night, one of the fish-eye lens time-lapse frames happened to capture a bright meteor. You see it briefly in a flash in the music video above, but below is the single frame.
A single 4-second exposure at f/2 with the TTArtisan 7.5mm circular fish-eye lens on the Nikon Z8 at ISO 1600. Taken as part of a 780-frame time-lapse.
Because it is streaking away from the constellation of Taurus, this is likely a member of the annual Taurid meteor shower which was in its final nights of the long period it is active in late October and early November. In fact, there are two Taurid showers, Northern and Southern, active at once and coming from similar spots in Taurus. They are known to produce bright fireballs and this was certainly one!
While the Sun is now in the downward slope of its cycle, coming off “solar max” last year, we may still see more major storms and aurora shows like this. Historically, the biggest solar flares and aurora displays often occur in the 2 or 3 years after solar maximum.
So stay tuned! The sky may still light up red with Northern Lights!
Southern Saskatchewan is a fine place to capture nightscapes of the Milky Way over the grand prairie landscape.
In late August 2025 I took a short road trip around southwest Saskatchewan, taking advantage of a run of wonderfully clear nights to shoot “nightscapes” at some of my favourite locations.
Southern Saskatchewan, and more specifically Southwest Saskatchewan, is a stargazing paradise. The skies are dark and there’s nothing to get in the way of seeing them! Yet, the landscapes have their unique beauty.
And in the case of Grasslands National Park the landscape preserves the endangered realm of original short-grass prairie. It is what the land was like long ago, even including some bison at large.
Grasslands National Park
Technical: This is a blend of tracked and stacked sky exposures with a single untracked ground exposure: – 7 x 60 seconds at f/2 tracked and focused for the sky, plus – 1 x 4 minutes at f/2.8 untracked and focused for the foreground to bring out the details lit only by starlight. No light painting was employed here. – All with the Nikon Z8 at ISO 800 and Nikkor 20mm S lens, on the MSM Nomad tracker. And all from the same tripod position. However, the camera was reframed upward for the sky shots.
In fact, my main destination on my visit to Grasslands this year was to revisit a site I had intended to shoot from in 2019 โ the Bison Rubbing Stone overlooking the Frenchman Creek Valley, with the Milky Way as a backdrop.
This year I was assured the bison were in the outback, so I set up at their rubbing stone. This is one of the many glacial erratic boulders the Ice Age left scattered across the prairies. With no trees about, the bison have long loved to use them to scratch an itch. But the connection with the stars is that one legend of the sky told by Blackfoot First Nations describes the Milky Way as the “Buffalo Trail,” the dust left by a cosmic herd of bison.
I got the shot! Then all I had to do was turn the camera around to face north to get this scene.
Technical: This is a panorama of 5 segments, each 30 seconds untracked at f/2 with the Nikkor 20mm S-Line lens and Nikon Z8 at ISO 1600. Stitched with Adobe Camera Raw. I removed aircraft trails, but at left I retained the many faint satellite trails in the northwest still lit by twilight, as this was early at about 10:30 pm CST. I did not focus stack these frames. Nor was the camera tracking the stars.
A mild aurora appeared in a classic arc across the north, and framed between the hiking trail, with the Big Dipper to the left and the Milky Way rising to the right. This is the wonderful sky that awaits in the “big sky” country of Grasslands. On the horizon only 3 distant lights could be seen. Grasslands is a Dark Sky Preserve. May it always be so!
Technical: This is a blend of tracked and stacked sky exposures with a single untracked ground exposure: – 4 x 30 seconds at f/2 tracked for the sky, plus – 1 x 2 minutes at f/2.8 untracked for the ground to bring out the details lit by starlight, plus – A single 30-second tracked exposure through a Tiffen Double Fog 3 filter layered in, to add the star glows. – All with the Nikon Z8 at ISO 800 and Nikkor 20mm S lens, on the MSM Nomad tracker. And all from the same tripod position. The camera was not moved for the sky photos.
The night before I headed south out of the little town of Val Marie to a favourite spot high on the hill overlooking the Park. It is called Two Trees, but now only one tree remains! It made a fine foreground for the classic “lone tree and Milky Way” nightscape.
In August the galactic centre lies in the southwest quickly setting in the early evening. But from this latitude of 49ยบ N even with it at its highest, the Milky Way core lies low in the south, making for good compositions with foregrounds below.
Here I present a “landscape” version of the image above, in versions with and without labels to indicate all the rich nebulas and star clusters in this area of sky in Sagittarius the Archer, home of the Milky Way core. Tap on the images to bring them up full screen.
Similarly, below I present views looking east to the autumn constellations rising over the prairie. This was from the valley below Two Trees Hill, at the Riverwalk day use site. Here there were absolutely no lights visible, and hardly a sky glow on the horizon from towns and light pollution. This was paradise for a stargazing session.
The constellations in this area of sky are the ones made famous in the classic tale of the hero Perseus riding on Pegasus the Flying Horse to rescue the lovely Princess Andromeda from Cetus the Sea Monster, while vain Queen Cassiopeia looks on.
Here the sky was also tinted green, not with aurora but airglow, a natural effect caused by high-altitude oxygen fluorescing at night, giving off energy it has absorbed by day. It discolours the sky but it belongs there! It is visible only at dark sky sites.
The Great Sand Hills
From Grasslands I ventured north to the little town of Leader, Saskatchewan, one of the jumping off points to visit the Great Sand Hills nearby. You have to have a local map to find them, but the sand dunes are extensive, and an oddity on the prairie, another Ice Age relic.
They are not a Park but are an ecological reserve, with limited access. I shot from the main spot with parking for visitors and a trail off into the dunes.
Here is another pair of images with annotations, looking north from the main dune field toward Ursa Major and the Big Dipper.
An extensive display of airglow also tints the sky, at least I think that’s the source, and not aurora.
Technical: This is a blend of tracked and stacked sky exposures with a single untracked ground exposure: – A stack of 4 x 60 seconds at f/2 tracked for the sky, plus – 1 x 4 minutes at f/2.8 untracked for the ground, plus – A single 60-second tracked exposure through a Tiffen Double Fog 3 diffusion filter layered in, to add the star glows. – All with the Nikon Z8 at ISO 800 and Nikkor 20mm S lens, on the MSM Nomad tracker. And all from the same tripod position. However, the camera framing was changed for the sky and ground shots, tilting it up it to include more of the sky up the northern Milky Way.
Turning around to face south again frames the sweep of the summer Milky Way over the well-trodden dunes. Not quite the Saharan or Namibian scene you might want, but this is Saskatchewan and having even this scene on the prairies is unique. The only other dune fields are far up north and not readily accessible.
Technical: This is a blend of tracked and stacked sky exposures with a single untracked ground exposure: – A stack of 4 x 60 seconds at f/2 tracked for the sky, plus – 1 x 3 minutes at f/2.8 untracked for the ground to bring out the details lit only by starlight, plus – A single 60-second tracked exposure through a Tiffen Double Fog 3 diffusion filter layered in, to add the star glows. – All with the Nikon Z8 at ISO 800 and Nikkor 20mm S lens, on the MSM Nomad tracker. And all from the same tripod position. However, the camera framing was changed for the sky and ground shots, tilting it up it to include all the constellations in one frame but with just a sliver of ground in the frame.
Looking east from the dune again frames the mythological autumn constellations, with the “W” of Cassiopeia at top amid the Milky Way. The bright “star” at lower right is Saturn. The Pleiades are just rising at left.
The Cypress Hills
I had started my Saskatchewan journey in the Cypress Hills, another formation created by the Ice Age, or rather left untouched by the glaciers creating a high wooded oasis on the prairie. I was there for the annual Saskatchewan Summer Star Party, the subject of my previous blog here.
Technical: This is a blend of: – A stack of 4 x 1 minute exposures, tracked, for the sky with … – A stack of 2 x 1-minute exposures, untracked, for the ground, – All with the Canon RF 28-70mm lens at f/2 and set to 48mm, on the astro-modified Canon EOS R at ISO 1600, and on the MSM Nomad tracker. No filters were employed here. Masking and blending all the images, with the trees in the foreground was a challenge! The camera was not moved โ all images were from the same tripod position.
But on the first couple of nights, with the entire four nights of the Party promising to be clear, I left the Party and headed off on my own to shoot some nightscapes over the pine trees at Lookout Point, to again catch the photogenic galactic core in its last appearance for the season.
For the image below, I employed a special filter that isolates the deep red light emitted by the many hydrogen-gas nebulas toward the Milky Way core.
Technical: This is a blend of: – A single 2-minute exposure, untracked, for the ground, blended with โฆ – A stack of 5 x 1 minute exposures, tracked, for the sky, plus โฆ – An additional tracked 2-minute exposure layered in, taken at the end of the set through an Astronomik “narrowband” H-Alpha clip-in filter, to add the red nebulas. – All with the Canon RF 28-70mm lens at f/2 and set to 35mm, on the astro-modified Canon EOS R at ISO 1600 (3200 for the Ha shot), and on the MSM Nomad tracker. Masking and blending all the images, with the trees in the foreground was a challenge! The camera was not moved โ all images were from the same tripod position.
This is a technique borrowed from “deep-sky” imaging but now popular among nightscape photographers to create an even more enhanced night sky than a normal unfiltered view.
But even without the filter the long exposures used for the sky record far more detail and colours than even dark-adapted eyes could see. The filter takes that even further.
But those nebulas are there, and they do glow red. Just like the airglow that unaided eyes usually cannot see, the long exposures reveal the unseen, in this case some of the wonderful content of our Galaxy.
And that’s the attraction of astrophotography, to reveal the otherwise elusive or invisible structure of the sky, and in this case juxtaposed over familiar earthly landscapes below.
I can highly recommend Southwest Saskatchewan for anyone interested in stargazing and astrophotography. It’s always been one of my favourite destinations.
It took a last-minute chase, but I managed to capture the total eclipse of the Moon on March 14, 2025.
It would not be an eclipse without a chase. Solar eclipses of the total kind almost always involve travel, often to exotic locales around the world. But total lunar eclipses come to you, as they can be seen from an entire hemisphere of the planet.
Except there’s one problem โ clouds! Over the last decade since 2014, of the eight total lunar eclipses (TLEs) I was home in Alberta for, I had to chase into clear skies for all but one. A recounting of one such chase from January 2019 is here.
Only for the TLE before this most recent (on November 8, 2022) was I able to stay home to watch it. Though in that case a snowstorm the day before made the roads and travel poor, so I had to stay home. I recounted that eclipse story here. You’ll find links to my other lunar eclipse stories below.
Once again, for the March 13/14, 2025 TLE, weather prospects looked poor. Not just in my area but in many regions of the continent. But there was hope!
Astrospheric and Environment Canada cloud forecast + Moon information
The forecast cloud cover showed home to be hopeless. But a clear area was supposed to be open in southwestern Alberta, marked by the red circle above. That’s Waterton Lakes National Park, just on the US border. It’s a favourite place of mine for nightscape photography anyway (see my blog from this past summer here).
The chart above from the app Astrospheric shows the clear hole, and the dark blue on the time-line indicates the period with no clouds. Note how it coincides with the wavy line below which shows Moon altitude, with the orange and red regions indicating when the eclipse would take place. Looks good! So I made my plan to chase.
I knew the area well enough to know the site would be a good one for the eclipse, and the Moon’s location to the south. But it pays to check. I use The Photographer’s Ephemeris as my main photo planning app.
TPE Plot of Sightlines
It showed the sightline toward the Moon during the eclipse as straight down Upper Waterton Lake. My chosen spot was on the lakeside Waterton Avenue, where I could set up both the wide-angle camera and a telescope without having to heft gear any distance. Winter road closures also limited my site choices. Indeed, in winter the Park is quiet, with only a few hotels and restaurants open, and many businesses boarded up.
TPE 3D Simulation
Switching to the companion app TPE 3D (above) showed a preview of the landscape and the Moon’s position in the sky relative to the scene below.
Compare the simulation to the real thing below! Pretty accurate, except for the scattered clouds that drifted through.
This is a blend of separate images for the sky and ground: a stack of two untracked images for 60 seconds each for the ground, then a third exposure for the sky and untrailed stars, taken immediately afterwards with the tracker motor on, for 30 seconds, all with the Canon RF15-35mm lens wide-open at f/2.8 and at 20mm, on the Canon R5 at ISO 1600. Separate shorter tracked exposures of 15, 8 and 4 seconds blended in kept the lunar disk from overexposing, showing it more as the eye saw it.
The above image is a blend of tracked exposures for the Moon and sky, with untracked exposures for the ground. I shot them just before mid-totality at 1 am MDT. That image was second in priority. First, was a panorama. That result is below.
This is a panorama of four segments at 30ยบ spacing, taken in two passes: first untracked for 30 seconds each, then a second pass immediately afterwards with the tracker motor on, also for 30 seconds each, all with the Canon RF15-35mm lens wide-open at f/2.8 and at 20mm, on the Canon R5 at ISO 1600, with the camera in landscape orientation. Separate shorter exposures of 15s, 10s, 5s and 2.5s at ISO 400 were blended in to preserve the lunar disk more as the eye saw it.
I shot this scene just as totality began, to ensure I got it. While the Moon was in clear sky before totality during the partial phase, sure enough as the Moon became fully eclipsed, the clouds wafting over the mountains threatened to move in and obscure the view.
Luckily, while they did hide the Moon now and then, they opened up enough for good views and images for a few minutes at a time throughout the eclipse.
For the panorama I processed the image for a more monochromatic look, to resemble the naked-eye view, but with the Moon appearing as a red globe in the sky, the only colour in the scene. (I shot the tracked shots with the MSM Nomad tracker I reviewed here.)
The site proved excellent, but it was a cold night! While the temperature was only just below freezing, the brisk Waterton wind off the lake made it a chilly experience watching the eclipse for two hours. I was actually being hit by ice pellets blowing off the lake.
I decided not to set up the telescope for close-ups; the wide-angle images were the priority anyway from such a scenic spot.
A single untracked 15-second exposure with the RF15-35mm lens at f/2.8 and 17mm on the Canon R5 at ISO 3200.
But I am not complaining. I got the eclipse, once again by chasing to where the weather predictions said it would be clear. The above is my requisite trophy shot.
Had I stayed home I would have been clouded out. Had predictions called for clear skies at home, I would not have made the trip to Waterton to enjoy the eclipse over its wonderful scenery.
The next total lunar eclipse is September 7, 2025, six months after this eclipse. But it is visible from the opposite hemisphere to this one, with no part of that eclipse visible from North America. I will not chase that far for a TLE!
The March 3, 2026 TLE from Alberta
After that, and after a passage of one lunar year (355 days or 12 lunar cycles) since the March 14, 2025 TLE, I have a chance for another total lunar eclipse from home, with western North America favoured. As I preview above, it’ll be an early morning event on March 3, 2026, with the eclipsed Moon setting in the west in the pre-dawn hours.
Sounds like another chase to a mountain site with the red Moon over the Rockies. That’ll be the plan!
2024 brought us a total eclipse of the Sun, superb auroras, and a naked-eye comet, three top highlights of a wonderful year of celestial attractions. Maybe the best!
In our book The Backyard Astronomerโs Guide (which we revised this year), Terence Dickinson and I created an Aah! Factor scale with various celestial sights ranked from:
โข 1, evoking just a smile, to โฆ
โข 10, a life-changing event!
Our book’s Aah! Factor Scale in Chapter 1
Coming in at an 8 is a naked-eye comet. Deserving a 9 is an all-sky display of an aurora. The only sight to rate a top 10 is a total eclipse of the Sun.
2024 brought all three, and more!
Hereโs my look back at what I think was one of the greatest years of stargazing.
NOTE: The images might take a while to all load. All can be enlarged to full screen. Just click or tap on them.
January
A Winter Moonrise to Begin the Year
The rising of the winter “Wolf” Moon, the Full Moon of January, over the frozen Crawling Lake Reservoir, in southern Alberta.
Now, this was not any form of rare event. But seeing and shooting any sky sight in the middle of a Canadian winter is an accomplishment. This is the rising of the Full Moon of January, popularly called the Wolf Moon, over a frozen lake near home in Alberta, Canada ๐จ๐ฆ.
It serves to bookend the collection with a Full Moon I captured eleven months later in December.
February
Auroras from Churchill, Manitoba
Had this been my only chance to see the Northern Lights fill the sky this year, I would have been happy. As we often see in Churchill, the aurora covered the sky on several nights, a common sight when you are underneath the main band of aurora borealis that arcs across the northern part of the globe.
This is a vertical panorama of the sky-filling aurora of February 10, 2024, as seen from the Churchill Northern Studies Centre, in Churchill, Manitoba.
I attended to two aurora tour groups at the Churchill Northern Studies Centre who both got good displays to check โseeing the Northern Lightsโ off their bucket list. Join me in 2025!
March
Under the Austral Sky
Ranking a respectable 7 on our Aah! Factor scale is the naked-eye sight of the galactic centre overhead, with the Milky Way arcing across the sky. Thatโs possible from a latitude of about 30ยฐ South. Thatโs where I went in March, back to Australia ๐ฆ๐บ for the first time since 2017.
This is a framing of the most spectacular area of the southern Milky Way, from Centaurus at left, to Carina at right, with Crux, the Southern Cross, at centre.
I wrote about it in my previous blog, where I present a tour along the southern Milky Way, and wide-angle views of the Milky Way (the images here are framings of choice regions).
This frames the southern Milky Way from Canis Major and its bright star Sirius at top, to Carina and its bright star Canopus at bottom, the two brightest stars in the night sky. The large red complex is the Gum Nebula.
It is a magical latitude that all northern astronomers should make a pilgrimage to, if only to just lie back and enjoy the view of our place in the outskirts of the Galaxy. I was glad to be back Down Under, to check this top sky sight off my bucket list for 2024.
April
A Total Eclipse of the Sun
No sooner had I returned home from Oz, when it was time to load up the car with telescope gear and drive to the path of the April 8 total solar eclipse, the first “TSE” in North America since 2017, which was the last total eclipse I had seen, in a trip to Idaho.
This is a composite of telescopic close-ups of the April 8, 2024 total eclipse, with a multi-exposure blend for the corona at centre, flanked by the diamond rings.
But where? I started south to Texas, my Plan A. Poor weather forecasts there prompted a hasty return to Canada, to drive east across the country to โฆ I ended up in Quรฉbec. My blog about my cross-continental chase is here. My final edited music video is linked to below.
It was gratifying to see a total eclipse from “home” in Canada, only the third time Iโve been able to do that (previously in 1979 โ Manitoba, and 2008 โ Nunavut). If the rest of the year had been cloudy except for this day I wouldnโt have complained. Much.
This definitely earned a 10 on the Aah! Factor scale. Total eclipses are overwhelming and addictive. Iโve made my bookings for 2026 in Spain ๐ช๐ธ and 2027 in Tunisia ๐น๐ณ.
May
The Skyโs On Fire
It had been several years since I had seen an aurora from my backyard with colours as vivid and obvious as they were this night. But on May 10, the sky erupted with a fabulous display of aurora that much of the world saw, as aurora borealis in the north and aurora australis in the south.
This is a 300ยบ panorama of the May 10, 2024 Northern Lights display, when the Kp Index reached 8 (out of 9), bringing aurora to the southern U.S.
This was the first of several all-sky shows this year. I blogged about the yearโs great auroras here, where there are links to the movies I produced that capture the Northern Lights as only movies can, recording changes so rapid it can be hard to take it all in. Check off a 9 here!
So not even half way through the year, I had seen three of the top sky sights: the Milky Way core overhead (7), an all-sky aurora (9), and a total eclipse of the Sun (10).
But there was more to come! Including an Aah! Factor 8.
June
World Heritage Nightscape Treks
This is a panorama of the arch of the Milky Way rising over the Badlands of Dinosaur Provincial Park, Alberta, with a sky tinted with twilight and airglow.
The sky took a break from presenting spectacles, allowing me to head off on short local trips, to favourite nightscape sites in southern Alberta, which we have in abundance. The Badlands of Dinosaur Provincial Park are just an hour away, the site for the scene above.
A panorama at sunset at Writing-on-Stone Provincial Park (รรญsรญnai’pi) in Alberta, with the Milk River below and the Sweetgrass Hills in the distance in Montana. Note the people at far right.
The rock formations of Writing-on-Stone Provincial Park are a bit farther, requiring a couple of days commitment to shoot. Clouds hid the main attraction, the Milky Way, this night, but did provide a fine sunset.
The Milky Way rises over Mt. Blakiston, in Waterton Lakes National Park, Alberta. This was June 10, 2024, so snow remains at high altitudes.
A little further west down the highway is Waterton Lakes National Park, another great spot I try to visit at least once each year.
All locations I hit this month are U.N. World Heritage Sites, thus the theme of my blog from June. People travel from all over the world to come here, to sites I can visit in a few hours drive.
July
Mountains by Starlight
In summer we now often contend with smoke from forest fires blanketing the sky, hiding not just the stars by night, but even the Sun by day.
The Andromeda Galaxy at centre is rising above Takakkaw Falls, in Yoho National Park. Above is the W of stars marking Cassiopeia.
But before the smoke rolled in this past summer I was able to visit a spot, Yoho National Park in British Columbia, that had been on my shot list for several years. The timing with clear nights at the right season and Moon phase has to work out. In July it did, for a shoot by starlight at Takakkaw Falls, among the tallest in Canada.
This is the Milky Way core and a bonus meteor over the peaks and valleys at Saskatchewan River Crossing, in Banff National Park, Alberta.
The following nights I was in Banff National Park, at familiar spots on the tourist trail, but uncrowded and quiet at night. It was a pleasure to enjoy the world-class Rocky Mountain scenery under the stars on perfect nights.
August
The All-Sky Auroras Return
In August I headed east to Saskatchewan and the annual Summer Star Party staged by the astronomy clubs in Regina and Saskatoon. It is always a pleasure to attend the SSSP in the beautiful Cypress Hills. The sky remained clear post-party for a trip farther east to the little town of Val Marie, where I stayed at a former convent, and had a night to remember out in Grasslands National Park, one of Canadaโs first, and finest, dark sky preserves.
The Northern Lights in a superb all-sky Kp6 to 7 display on August 11-12, 2024, in Grasslands National Park, Saskatchewan.
The plan was to shoot the August 11 Perseid meteor shower, but the aurora let loose again for a stunning show over 70 Mile Butte. My earlier blog has more images and movies from this wonderful month of summertime Northern Lights.
We are fortunate in western Canada ๐จ๐ฆ to be able to see auroras year-round, even in summer. Farther north at the usual Northern Lights destinations, the sky is too bright at night in summer.
September
Back to Deep Sky Wonders …
This is a framing of the rich starfield in Sagittarius and Serpens containing a mix of bright star clouds, glowing nebulas, and dark dust in the Milky Way.
September is the month for another astronomical party in the Cypress Hills, but on the Alberta side. At the wonderful Southern Alberta Star Party under its very dark skies, I was able to shoot some favourite deep-sky fields along the Milky Way with new gear I was testing at the time.
This frames the complex region of emission nebulas in central Cygnus near the star Gamma Cygni, at lower left. The Crescent Nebula is at centre.
And from home, September brought skies dark and clear enough (at least when there was no aurora!) for more captures of colourful nebulas (above and below) along the summer Milky Way.
This frames all the photogenic components of the bright Veil Nebula in Cygnus, a several-thousand-year-old supernova remnant.
We invest a lot of money into the kind of specialized gear needed to shoot these targets (and Iโm not nearly as โcommittedโ as some are, believe me!), only to find the nights when it all comes together can be few and far between.
… Plus, A Very Minor Eclipse of the Moon
I had to include this, if only for stark contrast with the spectacular solar eclipse six months earlier.
We had an example of the most minor of lunar eclipses on March 24, 2024, with a so-called โpenumbralโ eclipse of the Moon, an eclipse so slight itโs hard to tell anything unusual is happening. (So I’ve not even included an image here, though I was able to shoot it.)
Me at another successful eclipse chase โฆ to my backyard to capture the partial lunar eclipse on September 17, 2024. The Moon is rising in the southeast.
On September 17, we had our second eclipse of the Moon in 2024. This time the Earthโs umbral shadow managed to take a tiny bite out of the Full Moon. Nothing spectacular to be sure. But at least this eclipse expedition was to no farther away than my rural backyard. A clear eclipse of any kind, even a partial eclipse, especially one seen from home, is reason to celebrate. I did!
Of course, a total eclipse of the Moon, when the Full Moon is completely engulfed in Earthโs umbra and turns red, is what we really want to see. They rate a 7 on our Aah! Factor scale. We havenโt had a “TLE” since November 8, 2022, blogged about here.
We knew early in 2024 that the then newly-discovered Comet Tsuchinshan-ATLAS had the potential to perform this month. I planned a trip south to favourite spots in Utah and Arizona to take advantage of what we hoped would be a fine autumn comet.
This is Comet Tsuchinshan-ATLAS (C/2023 A3) at its finest in the evening sky, on October 14, two days after its closest approach to Earth, and with it sporting a 10ยบ- to 15ยบ-long dust tail, and a short narrow anti-tail pointed toward the horizon. The location was Turret Arch in the Windows area of Arches National Park, Utah.
It blossomed nicely, especially as it entered into the evening sky in mid-October, as above. Despite the bright moonlight, it was easy to see with the unaided eye, a celestial rarity we get only once a decade, on average, if we are lucky. My blog of my comet chase is here.
This is a panorama of Comet Tsuchinshan-ATLAS over Arches National Park, Utah, on a moonlit night, October 15, 2024, with the comet easy to see with the unaided eye.
A naked-eye comet ranks an 8 on our Aah! Factor scale. So now 2024 had delivered all four of our Top 4 sky sights.
This 360ยฐ panorama captures a rare SAR (Stable Auroral Red) arc across the Arizona sky in the pre-dawn hours of October 11, 2024. The SAR arc was generated in the high atmosphere as part of the global geomagnetic storm of October 10/11, 2024, with a Kp8 rating that night.
But … just as a bonus, there was another fabulous aurora on October 10, seen in my case from the unique perspective of southern Arizona, with an appearance of a bright “SAR” arc more prominent than I had ever seen before. So that view was a rarity, too, so unusual it doesn’t even make our Aah! list, as SARs are typically not visible to the eye.
November
Back to Norway for Northern Lights
2024 was notable for travel getting โback to normal,โ at least for me, with two long-distance drives, and now my second overseas trip. This one took me north to Norway ๐ณ๐ด, which I had been visiting twice a year as an enrichment lecturer during pre-pandemic years.
A green and red aurora appears over the coast of Norway, with Jupiter bright at right. This was from the Hurtigruten ship m/s Nordkapp on November 10, 2024, on a coastal cruise with a Road Scholar tour group.
The auroras were excellent, though nothing like the great shows of May and October. But the location sailing along the scenic coast and fjords makes up for any shortfall in the Lights. It was good to be back. I plan to return in 2025 for two cruises in October. Join me there, too!
December
A Winter Moonrise to End the Year
As I write this, December has been nothing but cloud. Almost. A clear hour on Full Moon night allowed a capture of the โCold Moon,โ with the Moon near Jupiter, then at its brightest for the year. So thatโs the other lunar bookend to the year, shot from the snowy backyard.
This is the Full Moon of December 14, 2024, near the planet Jupiter at lower right. Both were rising into the eastern sky in the early evening.
However, I did say after the clear total eclipse in April that if the rest of 2024 had been cloudy I wouldnโt complain. So Iโm not.
And thereโs no reason to, as 2024 did deliver the best year of stargazing I can remember. 2017 had a total solar eclipse. 2020 had a great comet. But we have to go back to 2003 for aurora shows as widespread and as a brilliant as weโve seen this year. 2024 had them all. And more!
The Sun peaked at โsolar maximumโ and gave us wonderful sky shows in 2024.
Officially, the Sun reached the peak of its roughly 11-year cycle of activity โ “solar max” โ in late 2024. Thatโs according to NASA and NOAA.
During 2024 several major solar storms erupted as a result of the Sunโs increased activity. They blew massive clouds of energetic particles โ electrons and protons โ away from the Sun. Some of those storm clouds swept past Earth, sparking bright auroras widely seen in both the Northern and Southern Hemispheres.
The rise and fall of solar activity. The peak at right is as of November 2024 in mid-Cycle 25. Courtesy SolarCycleScience.com.
I was fortunate enough, as many were, to witness several of 2024โs great auroras, from home in Alberta, and from as far south as Arizona.
Trips north to Churchill, Manitoba, and to northern Norway also presented some fine aurora nights. But thatโs normal at any time in the solar cycle from those sub-Arctic and Arctic locations.
Itโs when the aurora comes to you that you get a truly memorable show. And 2024 had its share of them.
NOTE: My blog has a lot of images and links to movies that may take a while to load. Images can be clicked on to bring them up full screen. The blog also contains many links to other sites to learn more!
Starting the Year โ February in Churchill
This was the month I made my annual trek to Churchill, Manitoba, to instruct aurora tour groups at the Churchill Northern Studies Centre. Why not join us in 2025?
An aurora selfie at the Churchill Northern Studies Centre, on February 10, with a modest Kp4-level storm underway. This is 20-seconds with the TTArtisan 11mm fisheye lens at f/2.8 on the Canon R6 at ISO 1600.
Yes, the air is cold (usually about -25ยฐ C) but the skies are often clear and aurora filled, as Churchill sits under the normal location of the auroral oval, the main zone of auroras. In fact, it is as far south in the world as the auroral oval normally resides, at a latitude of only 58ยบ North, well south of the Arctic. If itโs clear, thereโs almost always some level of Northern Lights.
This year, 2024, was no exception. Even on nights with low readings on the usual auroral indicators we got sky-filling displays that are rare down south.
This is a southerly arc of green and red Northern Lights on February 9. This is a panorama of 5 segments, each 20 seconds with the Laowa 15mm lens at f/2 on the Canon R6 at ISO 1600.
What I find in Churchill is that even with numerically weak and visually dim shows, as above, the camera often sees very red and photogenic auroras. The eye sees the colours only when the aurora brightens, which it often does (as I record below), sparking rippling green curtains (from glowing oxygen) fringed with pink (from glowing nitrogen).
I didnโt shoot time-lapses or movies this year in Churchill. Instead, the example movie above, shot using just real-time (not time-lapse) videos, is from February 2019. It is from my AmazingSky YouTube channel.
The video presents the aurora much as the eye saw it, and as it appears when it dances.
This is a 360ยบ panorama of the all-sky aurora of February 10, from the Churchill Northern Studies Centre. This is a panorama of 9 segments, each 15 seconds with the TTArtisan 11mm lens at f/2.8 on the Canon R6 at ISO 1600.
However, I tend now to shoot mostly panoramas, as above, from this year’s visit. They can take in the full show across the sky, in high-resolution images suitable for framing!
May 10 โ The Great May Display
The aurora apps were beeping this day, warning a great display was in the offing. The composite satellite image below from NOAA shows the actual extent of the aurora around the Northern Hemisphere during the great display of May 10/11 .
Note how the auroral oval is indeed an oval and how the centre is not the geographic North Pole. It is the North Geomagnetic Pole, in the High Arctic of Canada. ๐จ๐ฆ So the oval dips down farther south over North America than it does over Europe.
Image courtesy of the U.S. National Oceanic and Atmospheric Administration.
The May 10 solar storm rated a top “G5” on the G1 to G5 storm scale, while the โKpโgeomagnetic disturbance index reached Kp8 on the Kp0 (nothing) to Kp9 (OMG!) scale.
I gave a talk at a local community art gallery that evening, and alerted the audience to the likelihood of fine aurora later that night. Sure enough, I got home in time to see the sky already lighting up with aurora in the twilight and behind the clouds.
This was the multi-coloured curtain to the south during the great display of May 10. This is a 10-second exposure with the Laowa 15mm lens at f/2.8 on the Canon Ra at ISO 1600.
The clouds cleared off enough to reveal one of the most colourful shows Iโd seen in many years. This time there was no question about seeing reds and vivid pinks with the unaided eye. This was the type of show everyone hopes for. But it takes a Kp6 show and higher to spark it.
This was the view as the aurora suddenly brightened and converged at the zenith for a superb corona effect. This lasted no more than a minute before it dimmed and subsided again. This is a 9-second exposure with the Laowa 7.5mm circular fisheye lens at f/2 on the Canon R5 at ISO 800.
And a music video of the May 10 display incorporating time-lapse and real-time video footage is on my YouTube channel, with the clickable link below. Do enlarge to full screen.
One of the most remarkable aspects of this show was the blue auroras later in the night (shown below), created by sunlight illuminating the upper curtains and reacting with atmospheric nitrogen. The usual auroral greens and reds are from oxygen. Pinks are also from nitrogen. Blues are less common, but were in abundance this night.
This is a 360ยฐย panorama of the May 10/11 aurora exhibiting vertical blue and magenta rays across the western (left), northern (bottom), and eastern (right) sky, and an odd bright patch to the south at top. This was toward the end of the main activity this night, at about 2:30 am. This is made of 20 segments, each 13-second exposures, with the Laowa 15mm lens at f/2 on the Canon Ra at ISO 800.
Auroras around summer solstice, June 21, can be more colourful and often blue, as the Sun lights the upper atmosphere all night. I saw blue auroras again later in the summer.
July โ NLCs and Classic Auroral Arcs
June and July are normally when we in western Canada get good displays of another northern mid-latitude phenomenon, noctilucent clouds (NLCs).
This shows sunlit noctilucent clouds in the northwest in the summer twilight, and as the waxing crescent Moon sets at left. This was July 9 at 11:45 pm MDT, in a panorama of 5 segments, each a 30-second exposure with the Canon RF24-105mm lens at f/4 and 58mm on the Canon R5 at ISO 400.
These are ice clouds at 80 km altitude (almost in space) that are lit by sunlight all night long. I saw only a couple of displays of NLCs this year, and it wasnโt for lack of trying and clear nights, even amid forest fire smoke. The panorama above is from home on July 9, over a yellow canola field. NLC season always coincides with peak canola colour time!
Might NLCs be suppressed by high solar activity? Thereโs some data that suggests they are. However, we werenโt getting many auroras either in early summer.
A 180ยฐ panorama of the surprise aurora of July 25, as there was little indication in the days before that an aurora was possible this night. This is a panorama of 6 segments, with the Viltrox 16mm lens at f/2 on the Nikon Z6III at ISO 800, each 8-second exposures.
But at the end of July the Northern Lights returned for some classic shows of arcs across my northern sky, first on July 25 (above), with a prominent sunlit blue/purple ray at left by the Big Dipper. The Kp Index reached Kp5 this night, which is enough to produce a good display from my location in southern Alberta. The Moon is rising at right.
A 180ยฐ panorama of the Kp5-level aurora on July 29, with a green arc, and magenta and red rays. This is a panorama of 8 segments, each 30-second exposures with the Viltrox 16mm at f/2 on the Nikon Z6III at ISO 800.
Then again, four nights later on July 29, an auroral arc appeared across the north, this one with reds mixing with greens to create a yellow band in the east, as well as blue and magenta tops to the green arc that follows the curve of the auroral oval.
August 1 โ STEVE Appears
While June and July were quiet months, August made up for them.
Of all the auroras this year, only this one, on August 1, produced a showing of STEVE, at least as best I saw in 2024. He can be elusive and easily missed!
This is a capture of a faint appearance of a STEVE-like arc during the Kp5 aurora of July31/Aug 1. This was at 12:10 a.m. MDT, so on Aug 1. The camera recorded the pinkish rays at right which are likely STEVE arcs below a more diffuse and fainter red band which may be a SAR, a Stable Auroral Red arc.
STEVE is the odd arc, often white or mauve, that appears southward of the main aurora (from here in the Northern Hemisphere), typically after a show has peaked, then subsided and retreated back north, as it did above.
STEVE stands for Strong Thermal Emission Velocity Enhancement, as it is caused by horizontally flowing hot gas, and so is not, by definition, a true aurora created by energetic particles raining vertically down magnetic field lines.
For a classic showing of STEVE see my video, above, from August 2022. High-resolution 4K video I shot this night formed the basis for a scientific research paper, as it revealed structures in STEVE no one had seen before.
This is a capture of a brief appearance of a STEVE arc in the west during the Kp5 aurora of July31/Aug 1. This was at 1:10 a.m. MDT, so on Aug 1. The mauve STEVE arc was visible for about 15 minutes before it gradually faded. The green picket fence fingers, which were visible to the eye but colourless, appeared only a minute or so before this image and were gone no more than 2 mnutes later.
STEVEs are often accompanied by green โpicket fence fingersโ hanging down from the mauve arc. These fingers are more akin to normal auroras, but are created by particles from the STEVE band raining down local magnetic field lines. They do not come from far out in space as they do in a normal aurora!
August 4 โ A Coronal Outburst
On the night of August 3/4 I was able to join a photo tour run by local photographer Neil Zeller, to shoot Milky Way nightscapes. Escaping clouds, we ended up at a scenic spot south of Medicine Hat, Alberta, called Red Rock Coulee.
A 180ยฐ panorama of a Kp5-level aurora on a partly cloudy night, August 3/4. This was looking to the northeast at 3:00 am from a side road off the Trans-Canada Highway in southern Alberta just east of Brooks.
On the way home, the aurora began to let loose behind the clouds. We stopped once off the highway as the aurora brightened in an arc across the northeast, above.
A bright auroral curtain sweeps from the zenith down the western sky, as the sky brightens with the blue of a dawn twilight. This was the morning of August 4, with a Kp5 to 6 level aurora underway. The location was just off Highway 1 between Brooks and Bassano, Alberta. This is a single 13-second exposure with the Viltrox 16mm lens at f/2 on the Nikon Z6III at ISO 400.
We stopped again later, now at 4 am, and marvelled as the curtains converged at the zenith in the finest manifestation an aurora can produce, a swirling zenith โcorona.โ
A music video from August 4, using just a single real-time video, not a time-lapse, is above. It shows almost the full but brief appearance of the corona, just as the eye saw it looking straight up!
My plan was to shoot the annual Perseid meteor shower that was to peak on Sunday, August 11, from the same spot I shot it in 2016.
A 270ยฐ panorama of the aurora in the evening twilight on August 11, from the 70 Mile Butte trailhead in Grasslands National Park, West Block near Val Marie, Saskatchewan. This is a panorama of 11 segments, each 15 seconds with the Laowa 15mm lens at f/2.8 on the Canon R5 at ISO 800.
The aurora had other plans. Again, as it did on May 10, the sky was lighting up with colours as it darkened in the evening twilight, above.
This is a 360ยฐ all-sky panorama of the Kp6 to 7-level aurora on August 11, from Grasslands National Park. This is a panorama of 12 segments, each 4 seconds with the Laowa 15mm lens at f/2 on the Canon R5 at ISO 4000.
The aurora expanded to fill the sky, and with odd fragmented bits, shown above. My trio of cameras set up for the meteor shower got repurposed into taking aurora time-lapses, stills, and panoramas. And selfies! โ the title slide for this blog was from this memorable night at Grasslands.
The aurora was bright enough during this substorm outburst at 12:15 am that the red and green colours could be seen with the eye, though they were subtle. This is a 2-second exposure with the Laowa 15mm lens at f/2 on the Canon R5 at ISO 3200.
A notable moment was at midnight when, even to the eye, the sky to the east suddenly turned red, and a wave of crimson aurora quickly swept in. The reds from oxygen mix with the more usual auroral greens, also from oxygen, to create areas of yellow in the sky.
This was also peak night for the 2024 Perseid meteor shower. One bright Perseid meteor shoots down the Milky Way in Cygnus at top, amid the converging rays of the aurora at the magnetic zenith. This is with the Laowa 10mm lens at f/2.8 on the Nikon Z6III at ISO 6400 for 2 seconds.
A few still frames in the time-lapses did manage to catch a Perseid meteor or two, as above, embedded in the vivid curtains of light. But the meteors were upstaged by the Northern Lights this night.
A music video of this show is above, also on my YouTube channel (itโs been a busy year!). Using only time-lapses, it captures the sudden arrival of the red sub-storm, sped up to be sure, but it seemed that quick!
August 30 โ From Onset to Recovery
This night I was hoping to shoot deep-sky objects with telescopes I was testing at home. Again, the aurora had other ideas.
This view is looking north, but the fisheye lens is taking in much of the sky. The August 30 show was somewhat unexpected, though there were last-hour warnings a sky-covering display might be possible. This is a single 4-second exposure with the TTArtisan 7.5mm fisheye lens at f/2 on the Nikon Z6III at ISO 3200.
As the movie shows, a band of Lights across the north early in the evening promised to develop. So I set up a time-lapse camera and fisheye lens to capture, for once, a complete development of an aurora, from a diffuse band, to the onset of an active sub-storm outburst which occurred, as they often do, at midnight when we are looking down Earthโs magnetic tail at the source of the aurora particles.
As the video shows, the storm then subsides and the aurora changes character. During the post-sub-storm โrecovery phase,โ usually when we are under the dawn sector of the auroral oval, an aurora can switch to a pulsating effect with patches of aurora flashing off and on and flaming up to the zenith. This form of aurora is caused by electrons trapped in the Van Allen radiation belts that are bouncing back and forth from pole to pole.
The music video of this show, above, uses a mix of time-lapses and real-time videos shot with the 360ยบ 7.5mm fisheye lens. Itโs a great aurora lens for capturing it all!
September 16 โ A Colourful All-Sky Show
Auroras are often most frequent, active, and bright around the spring and autumn equinoxes, when the magnetic field lines of Earth and interplanetary space better connect. Itโs called the Russell-McPherron Effect.
This is a 360ยฐ panorama from left (southeast) to right (northeast) and extending from the horizon to the zenith, taking in the entire sky during an outburst of a particularly colourful aurora on September 16. This is a panorama of 12 segments, each 4 seconds with the Laowa 15mm lens at f/2 on the Canon R5 at ISO 400.
September 16 (6 days before the autumnal equinox) saw another all-sky show that, for us in western Canada, rivalled May 10. As with the spring show, this aurora was notable for its great range of colours, with nitrogen pinks and magentas mixed in with shades of oxygen yellow-greens and reds.
A darker blue-green band to the south (at left above) during the peak could be aurora from incoming protons exciting hydrogen, not from the usual electrons that excite all other auroras and light up oxygen and nitrogen atoms and molecules.
Yes, there are proton auroras. Another research paper using my images from an October 2021 aurora explored the relationship between proton auroras and SAR arcs (explained below).
This is an all-sky 360ยฐ panorama from the horizon at the edges, to the zenith at centre, taking in the entire sky during an outburst of a particularly colourful aurora on September 16. This is a panorama of 12 segments, each 4 seconds with the Laowa 15mm lens at f/2 on the Canon R5 at only ISO 400.
The September 16 show started with a diffuse band which quickly exploded as a sub-storm onslaught of energetic particles arrived to light up the aurora with greater brilliance, colours, and rapid motion. The onset of a substorm can happen in literally just a minute.
Even the nearly Full Moon failed to diminish this show, seen from home under perfect skies. Luckily, the smoky season had abated.
A music video of this nightโs show is also above on YouTube. Do click through to watch this and the other videos in full screen mode.
October 10 โ Red Aurora from Arizona
Six months to the day after the great May 10 show, the sky erupted again with auroras seen all over the world, even from more southerly latitudes that donโt normally see Northern Lights.
A rare red aurora seen from latitude +32ยบ N from southeast Arizona during the major Kp8-level storm of October 10. This is looking north from the Quailway Cottage near Portal, Arizona and Rodeo, New Mexico. This is a single 15-second exposure with the Canon RF15-35mm lens at 15mm and f/2.8 on the Canon R5 at ISO 1600.
I know because I was at one of those latitudes, in southern Arizona at 32ยฐ N. The aurora created the kind of show seen from areas that donโt normally get auroras โ a red sky on the horizon. It is these ominous red skies that provoked Medieval fears of divine wrath and myths of armies clashing in the distant North.
Red auroras can also occur in the Southern Hemisphere (as can every other form of aurora) when the aurora australis brightens and extends farther north than normal, lighting up the southern sky red at locations that rarely see the Southern Lights.
In both cases we are seeing just the red tops of distant curtains that mostly lie hidden over the horizon, the red coming from oxygen reactions that can happen only at the rarefied altitudes of 300 to 500 km. Oxygen greens come from 100 to 300 km up.
From Arizona, I saw what many in the U.S. saw this night โ a prominent glow, obviously red even to the eye, across the northern horizon. I was missing a far better show at home!
This is a 360ยฐ panorama covering the entire sky and extending up to the zenith at centre, capturing a rare SAR (Stable Auroral Red) arc across the Arizona sky in the pre-dawn hours of October 11. This is a panorama of 12 segments, each 30 seconds at f/2.8 with the Canon RF15-35mm lens on the Canon R5 at ISO 3200.
But unique to my more southerly site was this phenomenon, also widely seen across the U.S. and southern Canada.
Accompanying the โnormalโ aurora to the north was a diffuse red (to the camera) arc across the sky that lasted most of the night. This was a Stable Auroral Red (SAR) arc, created by thermal energy flowing horizontally in the high atmosphere some 400 km up.
SARs have been seen evolving into STEVEs, as the mechanisms seem related. Indeed, one of my images from August 1, shown above, seems to show a SAR/STEVE hybrid.
I set up a wide-angle lens and time-lapse hoping to catch such an evolution first-hand, which would have been of great interest to researchers. Alas, the SAR did not cooperate, stubbornly remaining a SAR all night.
This was the pre-dawn scene from southeastern Arizona on the morning of October 11 that frames a suite of skyglows. This is a panorama of 3 segments, each a stack of 5 x 1-minute tracked exposures with the Canon RF15-35mm lens at 15mm and f/2.8 on the Canon R5 at ISO 1600.
By dawn, with blue sunlight at work, the SAR looked magenta in the twilight, accompanied by two other sky glows:
The pyramid-shaped Zodiacal Light created by sunlight reflecting off cometary and meteoric dust in the inner solar system,
And the winter Milky Way, created by the combined light of distant stars in our section of our Galaxy.
So in one image we have atmospheric, interplanetary, and interstellar sky glows! This was truly an amazing sky, the likes of which I might never see again.
Ending the Year โ November in Norway
In early November I headed to Norway to instruct my first aurora group there since 2019. The location was on board a ship, the m/s Nordkapp, a ferry in the Hurtigruten fleet that does 12-day runs along the coast, from Bergen in the south, to Kirkenes in the far north, and back again.
Passengers on board the m/s Nordkapp are watching the Northern Light show on November 9, from the coast of Norway. This is 0.4 seconds at f/1.8 with the Nikkor 20mm lens on the Nikon Z6III at ISO 3200.
We got three nights in a row of active auroras on the northbound voyage. A Kp4 to 5 storm brought the Lights farther south and overhead for us early in the voyage, something we donโt normally see in Norway until we get underneath the auroral oval, which at that longitude in the world lies above the Arctic Circle, north of 66ยฐ latitude.
A colourful aurora appears in the darkening evening twilight sky at sea along the coast of Norway on November 9. This is a single 2-second exposure with the 20mm Nikkor lens at f/1.8 on the Nikon Z6III at ISO 1600.
But on November 9, with a storm underway, the show started early, rudely interrupting our groupโs cocktail hour as we all rushed up on deck. As it can do, the aurora glowing in a twilight sky took on added tints.
This is a panorama of auroral arcs across the southern sky, with prominent red content contrasting with the oxygen yellow-green bands. Taken on November 10/11 (just after midnight). This is a panorama of 7 segments, each 1.3-second exposures with the Nikkor 20mm lens at f/1.8 on the Nikon Z6III at ISO 3200.
The next night, November 10, as we sailed through the mountainous Lofoten Islands, we were treated to an aurora with lots of red content, above. No two auroras are alike!
An arc of Northern Lights points the way into the narrow Trollfjord in the Lofoten Islands of Norway, as our ship, the m/s Nordkapp enters the fjord at night by searchlight. This is a 0.5-second exposure at f/1.8 with the Nikkor 20mm lens on the Nikon Z6III at ISO 1600.
A curtain of aurora also nicely pointed the way into the short but scenic Trollfjord, a fjord the ship captains like to navigate into for a memorable side trip as we slide through the narrow canyon with seemingly inches to spare.
A music video of real-time aurora sequences shot from on deck during my November 2024 Norway cruise is above on YouTube. Note the phones held high, the way most people now shoot the aurora, and usually with very good success!
Whatโs Coming for 2025?
We have more to look forward to in 2025.
First, it is likely that the Sun has not peaked, but may undergo a second peak of maximum activity in 2025 or 2026. A double peak is common at many solar maxes. Just look at the graph at the opening of the blog, and the previous peaks of Cycles 23 and 24.
Plus, the most energetic solar flares and storms often occur after the peak on the downward trend of activity. So we could well see more worldwide aurora displays like we had on May 10 and October 10 in the coming two to three years. The show is far from over!
Watch websites like SpaceWeather.com for aurora alerts and news of solar events coming our way.
A plan to shoot the promised bright comet of 2024 paid off, with fine views at dawn and at dusk of the best comet since 2020.
Comets are always a gamble. Any new comets discovered, the ones that usually become the brightest, have no track record of performance. Predictions of how bright a new comet might appear are based on what a typical comet should do. But comets can outperform expectations and dazzle us, or they can fizzle and fade away.
In late 2023 it was clear that a then newly-discovered comet, C/2023 A3, named Tsuchinshan-ATLAS after the observatories where it was co-discovered, had the potential to perform in late 2024.ย
The low angle and position of the comet from home in Canada in the late September dawn sky, simulated in StarryNight software.
Knowing where it would be in the sky (that trait of a comet can be predicted with accuracy!) I planned a field trip to the U.S. desert Southwest for late September and early October 2024. From farther south the comet would be higher than it would be from home (shown above), and over spectacular landscapes.
I had visions of another Comet NEOWISE from July 2020. As my blog from 2020 shows, we saw that photogenic comet well from our northern latitude in Canada, as it skimmed across the northern horizon. Tsuchinshan-ATLAS would require a chase south.ย
September 26 & 27 โ at Bryce Canyon, Utah
In late September 2024 the comet would be inbound, approaching the Sun and in the morning sky. What better eastern scene than overlooking Bryce Canyon in Utah, where I had been a year before, for the October 14, 2023 annular eclipse of the Sun in the morning sky. (Click the link for my eclipse chase blog.)
I was fortunate to get two clear mornings, both from the Fairyland Canyon viewpoint, just a short walk from the parking lot to carry camera gear and tracking mounts.
Comet C/2023 A3, Tsuchinshan-ATLAS, at dawn over Bryce Canyon, on the morning of September 27, 2024.
My first look at the comet on September 27 was on the day the comet was at perihelion, closest to the Sun in its orbit, though not in the sky at our viewing angle from Earth.
The comet was just visible to the unaided eye, but was obvious on the camera view screen, even amid the bright twilight. I had to shoot fast as the window between โcomet riseโ and the sky brightening too much was only a few minutes long.
Comet C/2023 A3, Tsuchinshan-ATLAS, rising in the twilight over Bryce Canyon, on September 28, 2024.
Knowing better what to look for, I caught the comet a little sooner the next morning on September 28, and so the tail appeared longer and more impressive as it rose above the distant mountains. A group of other local photographers arrived just a few minutes too late both mornings, and so struggled to just sight the comet, let alone photograph it.
This vertical panorama takes in the nebula-rich northern winter Milky Way over the formations of Bryce Canyon National Park, from the Fairyland Canyon viewpoint.
But I had arrived extra early, to shoot a vertical panorama (above) of the winter Milky Way over the canyon formations below. This and the comet images were shot with the aid of a sky tracker to follow the stars, but with the tracker off for separate shots of the ground.
So I had bagged the comet at Bryce! On to the next stop.
September 28 & 29 โ at Monument Valley, Utah
Thereโs no more iconic or famous landscape in the American West than the buttes of Monument Valley, on the Navaho Tribal Lands on the Arizona/Utah border.
This panorama from the Navaho Tribal Park at Monument Valley shows the evening twilight sky looking east opposite the sunset to the rising dark blue arc of Earth’s shadow cast on the atmosphere. The shadow is rimmed with a pink “Belt of Venus” tint from sunlight still hitting the upper atmosphere.
A clear first evening provided a fabulous view of the arc of Earthโs shadow across the eastern sky from the viewpoint near the aptly named The View Hotel.
This is a panorama of the sunrise scene at the Navaho Tribal Park, Monument Valley, Arizona, taken just after sunrise with the low Sun lighting the iconic buttes and mesas of the Valley. The West and East Mittens are at left; the Sun was behind Merrick Butte at centre, and lighting Mitchell Mesa at right.
A wonderful sunrise on my second morning there made for a spectacular panorama. But while clouds created fine sunrise lighting, they arenโt conducive to seeing comets!
Comet C/2023 A3, Tsuchinshan-ATLAS (at centre), is rising in the dawn twilight over Monument Valley, Arizona on the morning of September 30, 2024. The comet is rising just south (right) of Merrick Butte.
A band of clear sky near the horizon allowed me to catch the comet rising to the right of Merrick Butte, as seen from a spot south of The View from where I had calculated the comet would rise in the right position. From the usual Valley viewpoint farther north the comet would have been behind the butte.
While the planning worked, the result was not quite the spectacle I had envisioned. The comet was nice, but was starting to become lost in the bright sky as it descended toward the Sun.
There were only a couple of mornings left to catch the comet at dawn before it disappeared completely into the daytime sky close to the Sun.
October 1 to 11 โ at Quailway Cottage, Arizona
The major block of time in my trip was booked for an astrophoto retreat at a cottage Iโd rented twice before but not since late 2017. The Quailway Cottage, popular among birders, is also ideal for stargazing as it is in one of the darkest areas of the Southwest, north of Douglas, Arizona, and just across the Arizona/New Mexico border.
This captures both the glow of Zodiacal Light in the eastern dawn sky (the band of light extending up across the frame) and the dust tail of Comet Tsuchinshan-ATLAS rising from behind the Pelloncillo mountains, at dawn on October 2, 2024.
When I arrived the comet was putting in its last show in the dawn sky. In fact, on October 2 I managed to capture a dawn scene with the morning Zodiacal Light created by sunlight reflecting off cometary dust in the inner solar system, and just the tail of the comet rising before the bright comet head appeared.
Comet C/2023 A3, Tsuchinshan-ATLAS, is rising in the dawn twilight over the Pelloncillo Mountains in New Mexico, on October 2, 2024.
An image taken a little later showed the entire comet, now sporting a more impressive tail. It was blossoming into a fine comet indeed. But we were about to lose sight of it for more than a week.
Arizona Deep-Sky Imaging
While at Quailway I had clear skies every night. And so, as planned, I went to town shooting all kinds of โdeep-skyโ objects and fields with two astrophoto rigs I had brought with me: a longer-focal length 120mm refractor for small targets, and a short-focal length refractor for wide fields in the Milky Way. I had reviewed both new telescopes in recent months.
The Askar APO120 on a veteran Astro-Physics AP400 mount. The Founder Optics Draco 62 on the small Star Adventurer GTi mount.
I concentrated on shooting targets low in the south that are impossible to get from home in Canada, and that Iโve missed shooting, or have not shot well, during my visits to Australia.ย See my blog here about my latest trek Down Under.
The two brightest Fornax cluster members are the elliptical galaxy NGC 1399 at upper left, paired with smaller NGC 1404, and the galaxy NGC 1365 at lower right, considered one of the best barred spirals in the sky.
Hereโs an example, above, with the larger Askar 120APO: a field of galaxies in the constellation of Fornax that rivals the better-known Markarianโs Chain of galaxies in Coma Berenices in the northern spring sky.
This frames the spectacular region of the Milky Way near the direction of the galactic centre in Sagittarius.
And hereโs a field (above) with the small Founder Optics Draco 62mm scope, framing the rich Sagittarius Starcloud punctuated with the small dark Ink Spot Nebula, all below the bright Lagoon and Trifid Nebulas.
This panorama extends for about 240ยบ along the northern half of the Milky Way, from Orion at left, to Sagittarius at right, and centered on the Galactic Equator.
In autumn the Milky Way is up all night. So I used a simple star tracker, the MSM Nomad reviewed here on my blog, and a 28-70mm lens at 35mm to shoot a panorama from dusk to dawn along the Milky Way โ from the summer stars of Sagittarius and Cygnus (at right, above), through the autumn constellations overhead in Cassiopeia and Perseus (at centre), and down into the pre-dawn sky with the winter stars in and around Orion (at left).
A Bonus Aurora from Arizona
I was just north of the Mexican border, at a latitude 32ยฐ North, more than 20ยฐ farther south than at home in Alberta. But what should appear in my sky but โฆ aurora!
A selfie of me observing the great red aurora of October 10, 2024, from southern Arizona.
On October 9, and then again more so on October 10, a great solar storm brought Northern Lights down to me. And indeed across all of Canada and the U.S. The result for me was a red glow to the north โ the tops of distant auroral curtains I would have seen filling my sky at home.
A time-lapse of an Arizona aurora, using a 15mm wide-angle lens shooting nearly 400 forty-second exposures. View it in-line here. Enlarge to a full screen view. There is no sound.
Above is a time-lapse video of the aurora that night, from a camera aimed due north for four hours. The red curtains come and go through the night.
This is a 360ยฐ panorama covering the entire sky and extending up to the zenith at centre, capturing a rare SAR arc across the Arizona sky in the pre-dawn hours of October 11, 2024.
The remarkable feature that night, October 10/11, was not the aurora, but what is called a SAR (Stable Auroral Red) arc that persisted all night. It appeared as a diffuse red band across the sky, created by heat energy leaking into the upper atmosphere during the solar storm. SAR arcs can accompany an aurora but are not auroras themselves.
This panorama takes in a rare confluence of skyglows in a colourful dawn sky.
By dawn the next morning, now October 11, the tall Zodiacal Light was prominent alongside the magenta SAR arc to the north (left) and the winter Milky Way to the south (right). Thereโs even a short pillar of light that might be an aurora fragment, or the tail of the comet!
The Comet Returns
However, toward the end of my 11-night marathon of deep-sky imaging, the bright head of the comet was to be rising into the evening sky for Part 2 of its apparition. Below is a shot from the evening of October 11, my last at Quailway. Yes, there it was, just above the Chiricahua Mountains. But it was a blip, barely visible in binoculars and to the camera. I had hoped for more.
This is Comet Tsuchinshan-ATLAS (C/2023 A3) at far right, barely visible emerging into the evening sky and low in the twilight, on October 11, 2024. This view includes Venus at left. Venus was obvious; the comet was not!
With the Moon now waxing into the evening sky, my plan was to head back north, stopping at scenic spots on the trip home, to catch the comet over moonlit landscapes to the west in the dusk sky.
My first two nights, October 12 and 13, at the VLA Radio Observatory near Socorro, New Mexico, then farther north near Canyon de Chelly, Arizona, were both beset by clouds to the west. From images posted on-line, I knew the comet was improving. But it was eluding me.
October 14 & 15 โ at Arches National Park, Utah
The next stop was Arches National Park in Utah, which I last visited in April 2015. The first nightโs forecast for October 14 also looked to be cloudy. But October 15 was supposed to be clear. So I extended my stay by an extra night, thinking that might be my only chance.ย
As it turned out October 14 was fabulous (below). The comet was easily visible to the unaided eye as a classic comet in the west. I pointed it out to folks walking by at the Windows Arches area. And I could hear other people commenting on it. At last a comet! One that anyone could see โ though it helped to be at a clear sky site like Arches.
Comet Tsuchinshan-ATLAS at its finest in the evening sky, two days after its closest approach to Earth, and with it sporting a 10ยบ- to 15ยบ-long dust tail, and a narrow anti-tail pointed toward the horizon.
By then the Moon was well advanced in age to a bright gibbous phase, so the sky was by no means dark. It was deep blue in photos.
Still the comet showed up brilliantly; it had blossomed a lot in a couple of nights. Above, I framed it beside moonlit Turret Arch.
Below is a scene from the next night, October 15, my โback-upโ night. The comet was certainly performing well after all. Even in the moonlight. In binoculars the tail stretched for the same length as the camera recorded it, some 15ยฐ.
This is a telephoto close-up Comet Tsuchinshan-ATLAS over the red rocks of Arches National Park, Utah, on a superb moonlit night, October 15, 2024.
Indeed, that was my last view of the comet for a while, as clouds prevented any more shooting on the rest of my journey north through Idaho and Montana.ย I even hit a snowstorm in southern Montana.
Late October โ Back at Home in Alberta
But the comet was not done yet! Through October, while it receded from us in distance, it climbed higher into our sky, placing it into a dark sky with the Moon now out of the way.ย
This is Comet Tsuchinshan-ATLAS in a wide-angle nightscape scene over the Badlands of Dinosaur Provincial Park, Alberta, on October 23, 2024.
On October 23, a short trip out to Dinosaur Provincial Park east of home allowed me to shoot the comet over the Alberta Badlands landscape, beside the setting summer Milky Way.
This is a telephoto lens framing of Comet Tsuchinshan-ATLAS in Ophiuchus on the night of October 30, 2024 near several large star clusters. The field of view is 15ยบ by 10ยบ so the tail extends for about 6ยบ to 8ยบ.
By a week later, on October 30, the comet had diminished in size and brightness, but still looked like a classic comet, here framed in a telephoto close-up as it passed near some bright star clusters. This was from my front yard. The chase was over.
Clouds and a trip to Norway starting November 4 prevented more opportunities to shoot the comet. (My travel schedule also kept me from writing this blog until now!)
It had been a good chase over a month, yielding images I was happy with. The photos from Utah and Arizona I could not have taken at home, even if the skies had been clear during the cometโs prime-time. (They werenโt!) And it was great to finally get back to my favourite haunts in southern Arizona and New Mexico after an absence of seven years.
In all, Comet Tsuchinshan-ATLAS provided a fine finale to what has been a superb year of stargazing events and celestial sights.
I test a trio of wide-angle, auto-focus lenses for astrophotography, all for Nikon Z mount: the Nikkor 20mm f/1.8 S, the Viltrox 16mm f/1.8, and the Laowa 10mm f/2.8 Zero D.
As a bonus, I also test a fourth lens: the TTArtisan manual-focus 7.5mm f/2 fish-eye.
NOTE: Images are large and may take a while to load.
While the selection of lenses for Nikon Z mirrorless cameras is not as diverse as it is for Sony E-mount, Nikon shooters have more brands of lenses to pick from than do users of Canon R mirrorless cameras. For nightscapes and Milky Way photography we want fast, wide-angle lenses, usually in the 14mm to 24mm range.
Canon, Nikon, and Sony all have excellent zoom lenses that cover the range. I use Canonโs RF 15-35mm L lens a lot, and reviewed it here on my blog from 2022.
But all these wide-angle zooms are f/2.8. While thatโs a good speed for most astro work, having an even faster lens can be valuable. An aperture of f/2 or faster allows for:
โ Shorter exposures for untrailed stars when shooting just on a tripod with no tracker.
โ Capturing fainter and more numerous meteors during a shower.
โ Rapid-cadence time-lapses of auroras, freezing the motions of curtains.
โ Real-time movies of auroras and satellite passages at lower, less noisy ISO settings.
The Nikkor 20mm at f/1.8 allowed a short 1.3-second exposure for capturing the aurora from a ship off the coast of Norway, to minimize ship motion trailing the stars.
Also, stopping those faster lenses down to f/2.8 can sometimes yield better image quality than shooting with a native f/2.8 lens wide open.
Canon and Sony each have fast f/2 zooms that cover the range from 28mm to 70mm. While those focal lengths can be useful, both lenses are expensive and heavy. And they are still not wide enough for many astro subjects. For fast lenses with even shorter focal lengths we need to turn to โprimeโ lenses, ones with fixed focal lengths.
As of this writing Canon has few fast, wide primes for their RF lens mount (their new 24mm f/1.4 VCM is a costly choice designed primarily for video use). A few third-party lens makers offer fast (f/2 or faster) primes for Canon full-frame cameras, always as manual focus lenses. For example, Laowa has a 15mm f/2, and TTArtisan has a 21mm f/1.5.
Yes, Sigma now offers auto-focus 16mm and 23mm f/1.4 primes, and Samyang has a new 12mm f/2, but they are only for Canon RF-S cropped-frame cameras. Canon has yet to allow other companies to produce auto-focus lenses for their full-frame cameras.
Nikon has been restrictive as well. Sigma’s much-lauded Art series that includes the 14mm rectilinear (i.e. the horizon remains straight) and 15mm fish-eye (with a curved horizon), both f/1.4 and aimed at astrophotographers, are not offered for Nikon or Canon, only for Sony E-mount and Panasonic/Leica L-mount cameras.
However, while Sigma lenses are missing, there is a wider choice of third-party lenses for Nikon Z-mount compared to Canon RF, plus Nikon itself makes a very fine 20mm prime in their premium S-series.
Thatโs what I test here โ three wide-angle rectilinear primes for Nikon Z: A 20mm Nikkor, and two third-party primes: one from Viltrox, their 16mm; and one from Laowa, their new 10mm.
As a bonus, I add in a test of a fast fish-eye lens, from TTArtisan, their 7.5mm f/2.
NOTE: All test images can be downloaded as full-resolution JPGs for closer inspection. Click or tap on the images.
Prices are from B&H Photo, but will vary with sales and special promotions.
The Nikkor 20mm S-Line Lens ($1,050)
The Nikkor 20mm accepts 77mm filters.The rear mount has weather sealing.
I shot the northern summer Milky Way (below) with the three rectilinear wide-angle lenses (meaning these are not fish-eyes) with the camera on a star tracker, to prevent star trailing. The tracker was the Move-Shoot-Move Nomad, reviewed here on my blog.
The Nikon Z6III and 20mm Nikkor on the MSM Nomad tracker.
I shot with Nikon’s new Z6III, a 24-megapixel full-frame camera I reviewed in the December 2024 issue of Sky & Telescope magazine. It offers a number of excellent features for nightscape photography. Most notably, auto-focus lenses zip to the infinity focus point automatically when the camera is turned on, something I wish Canon cameras would do.
The Nikkor 20mm has a field of view along the long dimension of 84ยฐ.
The Nikkor 20mm is the widest prime lens in Nikonโs premium S-Line series. It offers what I consider to be an ideal focal length for most nightscape and wide-field Milky Way images.
While a 14mm lens is often thought of as the default nightscape lens, a 20mm presents less distortion (objects leaning in or stretched out at the corners) and a more natural perspective. Plus the lens can be made faster (in this case f/1.8), smaller, and not cost as much as an ultra-fast 14mm like the Sigma f/1.4 Art lens.
Nikkor 20mm Corner Aberrations
The four panels show the upper left corner, in the area outlined in the inset that shows the full frame.
Sharp stars right to the corners is the ideal for all forms of astro images. We donโt want stars to turn into winged seagulls or coloured streaks. They should remain as pinpoint as possible.
The Nikkor 20mm shows very little aberrations across the frame. Stars are elongated by tangential astigmatism and discoloured by lateral chromatic aberration only slightly and only at the extreme corners.
Stopping down the lens decreased the aberrations, but some residual astigmatism remained, even at f/4. However, the corner aberrations are low enough, and so restricted to the very corners, that this is a lens you can certainly use wide open at f/1.8, or perhaps at f/2, without any penalty of image sharpness.
Nikkor 20mm Vignetting
The four panels show the left side, as outlined in the inset. The inset is the f/1.8 sample.
Ideally, we also want images to be as fully-illuminated across the frame as possible. Light fall-off, or vignetting, creates dark corners with less signal reaching the sensor. Less signal gives rise to more noise, noticeable when brightening the corners in processing. That can reveal unsightly noise, banding, and discolouration in nightscapes, especially in the ground, often the darkest part of a scene, not the starry sky.
The 20mm shows a fair degree of edge and corner darkening when wide open at f/1.8. Stopping the lens down to f/2 improves the field illumination notably. And by f/2.8 the field is fairly uniformly lit. There is little need to go as slow as f/4.
In all, the Nikkor 20mm S is a superb lens ideal for nightscapes and Milky Way images.
The Viltrox AF 16mm STM ASPH ED IF ($580)
The Viltrox also accepts 77mm filters. The Viltrox has weather sealing and a USB port, obscured here, for powering the lens when not on a camera.
The new company Viltrox has been making a name for themselves recently with the introduction of a number of top-quality pro-grade lenses to compete with the best from any brand, and at much more affordable prices.
The horizontal field of view of the Viltrox 16mm is 100ยฐ.
Their 16mm is an auto-focus lens that, on the Nikon, can actually auto-focus on stars, as can the Nikkor 20mm. However, it, too, will zip to infinity focus when powered up. Plus two function buttons can be programmed to rack between two preset focus distances, one of which can be infinity.
The buttons at left are for preset distances.The display shows depth of field as well as focus distance and aperture.
A manual aperture ring (above left) has 1/3rd-stop detents, or it can be set to A for controlling the aperture in the camera.
A colour OLED display (above right) shows the focus distance and aperture, a nice way to confirm your settings at night. The display is too bright on the darkest nights; I cover it with red gel.
An option to turn it red using the Viltrox app would be welcome.ย Or to turn it off! ….
NOTE ADDED FEB 24, 2025 โ I tested all lenses on a stock camera. But when used on an astro-modified camera with greater red and infra-red sensitivity, the Viltrox 16mm can add a noticeable red glow or flare to images, as a colleague has found and reported to me. I did confirm this with very long exposures and high ISOs with my stock Z6III. It barely shows up in dark frames boosted a lot for brightness (see below โ it’s the faint magenta band across the centre of the frame).
But in modded cameras it is much more obvious. This comes from the lens’s top OLED display. The trick is to slightly dismount the lens, which turns the display off, but still maintains data contact to the camera. Viltrox is aware of the issue and has said they will fix it in a firmware update.
With Viltrox lens fully engaged and display ONUpdate at your risk!Connect if you can!Set if you can!
Uniquely, this and other Viltrox lenses have Bluetooth built in, for direct connection to a mobile device for firmware updates and lens settings, shown above. However, I found the app buggy; it would connect to the lens, but then refuse to allow settings to be changed, claiming the lens was not connected. Or the app would freeze, disconcerting during a firmware update. Luckily, that did not brick the lens.
Viltrox 16mm Corner Aberrations
The four panels show the small corner area outlined in the centre inset that shows the entire image.
At the extreme corners, the Viltrox shows some softness (perhaps from field curvature), but only minimal astigmatism and lateral chromatic aberration when wide open at f/1.8, and slightly sharper corners at f/2. At f/2.8 corner performance is nearly perfect, and certainly is at f/4.
This is a level of aberration correction even the most premium of lenses have a hard time matching.
Viltrox 16mm Vignetting
The panels show the left side outlined in the centre inset, which shows the f/1.8 image.
As is often the case with wider lenses, the Viltrox does show a great deal of vignetting at f/1.8, more so than the Nikkor 20mm. While this can be corrected in processing it will raise noise levels.
Stopping down to just f/2 helps, but the field becomes more uniform only at f/2.8, the sweet spot for this lens for the best all-round performance. But it offers the speed of f/1.8 when needed, such as for auroras.
If you prefer a wider field than a 20mm provides, the Viltrox 16mm (also available for Sony) is a great choice that wonโt break the bank. Until Canon changes their third-party lens policy, Canon owners are out of luck getting this excellent lens.
The Venus Optics/Laowa 10mm Zero-D FF ($800)
The Laowa also accepts 77mm filters, unusual for such a wide lens..The Laowa also has a weather-sealing gasket. The lens has a unique blue-grey finish.
The lens maker Venus Optics (aka Laowa) is known for its innovative and often unusual lens designs.
Introduced in 2024, their new 10mm offers the widest field available in a rectilinear (not fish-eye) lens for full-frame cameras. The โZero-Dโ label is for the lensโs lack of pincushion or barrel distortion. Horizons remain straight no matter where they fall on the frame. However, objects at the corners become elongated a lot.
The Northern Lights in a superb display on August 11-12, 2024, at Grasslands National Park, Saskatchewan. This is with the Laowa 10mm wide open at f/2.8 on the Nikon Z6III at ISO 6400.
Even so, thereโs a lot to be said for having a field that extends for 130ยฐ across the long dimension of a full-frame sensor. Thatโs more than enough to go from well below the horizon to past the zenith when the camera is in portrait orientation. Even in landscape orientation (as above) the lens covers nearly a 90ยฐ field across the short dimension, enough to go almost from horizon to zenith.
The f/2.8 speed is slower than the other lenses on test here, but is still faster than most ultra-wide lenses. Remarkably, it accepts common 77mm filters, the same as the Nikkor 20mm and Viltrox 16mm.
The 10mm is available as an auto-focus lens for Sony E and Nikon Z, and in manual focus versions for Canon RF and Panasonic L, oddly all at the same price.
Laowa 10mm Corner Aberrations
The four panels show the corner area outlined in the inset, at four apertures between f/2.8 and f/4.
Corner aberrations are much worse than in the 20mm and 16mm lenses, showing a fair degree of tangential and sagittal astigmatism, elongating stars radially and adding wings to them, respectively. The aberrations are larger and reach deeper into the frame than in the Nikkor and Viltrox lenses.
Thereโs also some lateral chromatic aberration adding blue and purple fringes to the stars at the corners. Stopping down to f/4 improves, but doesnโt eliminate, the aberrations.
Laowa 10mm Vignetting
The four panels show the left side, as outlined in the inset, which shows the f/2.8 image.
Edge and corner darkening were also worse than in the other lenses and required about a +50 setting to correct in Adobe Camera Raw, far less than the maximum of +100. So itโs still quite acceptable and correctable.
However, while stopping the lens down to f/4 improves vignetting, it does not eliminate it, still requiring a +40 correction. Vignetting will be a factor to deal with in all astrophotos with this ultra-wide lens.
Laowa 10mm Lens Flares
Three panels showing the Moon framed in the left corner (L), centred (C), and in the right corner (R).
With such a wide lens, the Moon or other bright light sources are bound to be within the frame. The Laowa exhibits a prominent internal lens flare when bright objects are in the corners, but just in the corners. Objects near the edge but centered are fine.
Showing the effect of decreasing aperture on the lens flare and bright light source.
Stopping down the lens adds diffraction spikes (or โsunstarsโ) to bright lights, but doesnโt eliminate the circular internal reflection. None of this is a serious issue for most images, but it is something to be mindful of when framing nightscapes.
With the Laowa 10mm lens at f/2.8 on the Nikon Z6III at ISO 3200. Note the Big Dipper at left and Orion at right.
In Milky Way and starfield images, constellations in the corners can distort into unnatural shapes that look odd, as I show above. While the lens can take in a great swath of sky, its distortion and corner aberrations make it less than desirable for tracked Milky shots.
An aurora in the dawn twilight on September 17, 2024. A 4-second exposure with the Laowa 10mm at f/2.8.
Where the Laowa 10mm really proves its worth is for auroras, as above, which can require as wide a field as you can muster. Note the flat horizon.
For ultra-wide nightscapes in a single image (not a panorama) with a natural looking (not curved) horizon, and for meteor showers, the Laowa is just the ticket.
BONUS TEST: The TTArtisan 7.5mm f/2 Fish-Eye ($140)
The TTArtisan has a fixed lens hood. Front filters are not possible without vignetting. There’s no weather sealing or electrical connections at this price.
Technically, this lens is designed to be used on cropped-frame (or APS-sensor) cameras where it fills the frame with a curving horizon. But it works on a full-frame camera where it projects a circular image slightly larger in diameter than the short dimension of the frame, so not a complete circle as with a true circular fish-eye like the old Sigma 8mm f/3.5.
An aurora in the dawn twilight on September 17, 2024 in a 2-second exposure with the TTArtisan 7.5mm fish-eye lens at f/2 on the Nikon Z6III at ISO 800.
For all-sky auroras, this is ideal, where the TTArtisanโs fast f/2 speed is unprecedented in a fish-eye lens. That makes rapid-cadence time-lapses possible, as well as real-time movies. An example is here on my YouTube channel.
A stack of 4 x 4-minute exposures with the TTArtisan 7.5mm f/2 fish-eye lens stopped down to f/2.8 on the Nikon Z6III at ISO 1600, on the MSM Nomad tracker.
Or you can just capture the Milky Way from horizon to horizon, as above. For the latter, having stars sharp across the circular field is still desirable.
I have this lens for Canon RF as well, but that unit shows a noticeable softening of the left edge with defocused stars, likely from lens de-centering. I was told by TTArtisan that was a normal unit-to-unit variation and not a defect warranting replacement. Annoying!
I hesitated to buy one for my Nikon. But this is such a unique lens, and so affordable, I took the chance. The Nikon Z-mount version proved much better.
TTArtisan 7.5mm Edge Performance
There is no corner performance or vignetting to test here.
TTArtisan 7.5mm lens at f/2, showing the left side area shown in the blowups below.
Instead, Iโm inspecting the same side on the Nikon Z version that caused a problem on my Canon version.
Comparing f/2 and f/2.8 edge aberrations.
The Nikon version looks fine, with stars sharp along the edge even at f/2, showing just a low level of astigmatism, to be expected in such a fast, wide lens. Stars tighten up a bit more at f/2.8. Most critically, the field was flat and in focus across the frame. There was no evidence of lens de-centering or optical defects.
The edges do show some discolouration and a soft edge to the image area. I also see two odd dark protrusions at the top of the frame. Looking through the lens, thereโs nothing obvious intruding into the light path.
Keep in mind when used on a full-frame camera youโre seeing more of the projected image than was intended in the design.
The 7.5mm lens comes with a metal lens cap with a threaded centre disk. Remove it to create an aperture that vignettes the image to a smaller but complete circle.
The TTArtisan 7.5mm is a specialty lens to be sure. But at its low price it isnโt a big outlay to include in your lens arsenal, for unique all-sky images, of auroras, satellite passages, sky colours, and the Milky Way. And it is terrific for time-lapses and movies of the whole sky. It is a no-frills manual lens available for most camera mounts.
Recommendations
The Viltrox 16mm, Laowa 10mm and TTArtisan 7.5mm are all available for Sony E-mount. The Laowa and TTArtisan are available for Canon RF, but the Viltrox 16mm is not, as it is an auto-focus, full-frame lens, the class of lenses Canon has yet to allow on their RF mounts, much to the disdain of all concerned but Canon management it seems.
Viltrox 16mm โ For nightscape use, the Viltrox 16mm might be the single best choice, as being the most versatile and affordable of the trio of wide-angle lenses. Its focal length is a good balance between the usual 14mm and what I think is a more useful 20mm.
Nikkor 20mm โ I like the Nikkor 20mm for its lower level of vignetting, slightly tighter framing, and very sharp stars. I think a 20mm is an ideal focal length for many nightscapes and Milky Way scenes. But it is the most expensive lens tested here.
Laowa 10mm โ While nearly as costly as the Nikkor 20mm, the Laowa 10mm is much more specialized and, I think, not as useful as the others for general nightscape and Milky Way shooting. But it is superb for auroras, if you are in a place where they are common, as they are here in Alberta. Otherwise, I think youโd find the 10mm a costly lens that might not see a lot of use for astrophotography. Its real fortรฉ is architecture and real-estate interiors.
TTArtisan 7.5mm โ Ditto on its limited use. But it is so affordable itโs easy to justify even if it doesnโt get a lot of use. The astro images, time-lapses, and movies it can produce are unique and impossible to create any other way. Be sure to buy it from a source where you can return it easily if you find your sample defective.
Reason To Go Mirrorless
The quality of these and other premium lenses from Nikon, and also from Canon, Sony and third-party makers like Sigma and Viltrox, is one of the major benefits of migrating to mirrorless cameras. DSLRs, and the lenses made for them, are now effectively dead as new gear choices.
Yes, mirrorless cameras can be better in many aspects of their operation than DSLRs. But it is the lenses made for mirrorless that show the greatest improvement over their DSLR equivalents, many of which date back to the forgiving film days.
The PDF can be printed at home. It is designed to be printed landscape mode at 13×10-inches, but will work printed 11×8.5-inches. Office supply shops might be able to print it with mounting holes and a spiralย binding.ย
My 12-month Calendar is illustrated with a selection of 14 of my favourite astro-images from 2024, taken from Alberta, Australia, Utah, Norway, and Quebec.
Each month includes listings of the best sky events for the month, with an emphasis on naked-eye sights, and photogenic events. I’ve selected the Calendar events to be suitable for stargazers in North America.
The new star tracker from Move Shoot Move improves upon their original model, eliminating its flaws to provide a reliable and compact tracker.
A few years ago the start-up company Move Shoot Move (MSM) introduced a low-cost (about $250), compact star tracker they called the Rotator. Like all other star trackers, the Rotator allowed a camera to follow the turning sky for untrailed, pinpoint stars in long exposures.
Trackers are essential for rich Milky Way images, and are great for nightscapes, for shooting the sky, blended with untracked shots of the ground, as I show in examples below.
The original Rotator (L) and new Nomad (R). The Nomad is even smaller than the Rotator.
Out with the Old โฆ
The original Rotator went through a couple of design changes during its lifetime. I tested the last versions to be marketed, using three different sample units I either purchased or were sent to me by MSM. (My reviews appeared in 2019 on my blog here, and in the June 2021 issue of Sky & Telescope magazine.)
The bottom line is that I found all the samples of the Rotator I tested to be unreliable for accurate tracking, indeed for tracking period, as units would sometimes not start tracking for a few minutes, or just stop tracking mid-shoot and then restart intermittently. Getting a set of untrailed exposures was a hit or miss affair.
But with a cost lower than most other trackers on the market (ostensibly, as explained below), a pocketable compact size, and with endorsements from notable nightscape photographers, the original Rotator garnered a loyal following of fans. I was not one of them.
MSM obviously recognized the design flaws of the Rotator, because in early 2024 they replaced it with an all-new model, dubbed the Nomad. It works!
The Nomad on the Benro 3-Way Head, with Laser and Polar Scope, and with a camera and 135mm lens. The ball head is not one from MSM.
I purchased a unit in January 2024 when the Nomad came out, and have used it extensively and successfully over the last few months. I found it has addressed all the serious flaws of the Rotator.
Polar Alignment Accessories
With a weight of about 400 grams, the Nomad is about 70 grams lighter than the old Rotator. It is one of the lightest and smallest trackers on the market, a benefit for those wanting to hike to remote nightscape sites, or pack gear for airline travel. (I took my Nomad to Australia this year; one result is below, shot with the Nomad.)
This frames the spectacular area of the southern Milky Way from Centaurus at left, to Carina at right, with Crux, the Southern Cross, at centre. This is a stack of 8 x 4-minute exposures with the Canon RF28-70mm lens at 48mm and f/2.8, on the Canon Ra at ISO 800. All on the MSM Nomad tracker.
However, unlike the popular Star Adventurer 2i and Mini trackers from Sky-Watcher, the Nomad, like MSMโs older Rotator, does not have a polar alignment scope built in, just a peep sight hole. That makes it easier for MSM to fit a tracker inside a compact box.
And yet, I feel some form of polar alignment aid (not just a peep sight) is essential if a tracker is to follow the sky accurately. Like the Rotator, the Nomad can be purchased with two add-on choices (shown below):
โข a 5 mw green laser pointer,
โข and an optical polar scope โฆ
โฆ each of which attaches to the side of the Nomad as outboard accessories. I purchased both, bundled with the Nomad as โBasic Kit Cโ for $309 U.S., and find both accessories useful.
NOTE: When shopping at the MSM website donโt be fooled by what looks like temporary sale prices. The prices are always marked down, though MSM does offer coupon codes now and then for genuine discounts. I’ve always found MSM’s delivery by parcel post prompt, and in my case, shipments came from a warehouse in Canada, not China.
The Laser and Polar Scope as they come suppliedWith the Laser threaded on using the red capWith the Polar Scope clamp attachedWith both the Polar Scope and Laser attached. Don’t lose the caps at bottom!
As with the Rotator, the need to add essential accessories makes the Nomad more expensive and more complex to pack than buyers might think. And it can be more complex to initially set up than imagined, not helped by the lack of any instructions. (I’m told by MSM that a downloadable PDF sheet is being prepared.) In place of factory-supplied instructions, MSM depends on its YouTuber fans to provide tutorials.
It took me a moment to figure out how the laser attaches to the Nomad โ it does so by replacing the black cap that comes on the laser with a supplied threaded red cap, so the laser can screw into the peep hole on the Nomadโs body that is covered by yet another cap you remove โ but donโt lose it, as you might need it.
The optical polar scope attaches by way of an included clamp held onto the Nomad by the laser, or by the removable threaded cap (so you will need it if you arenโt using the laser, but it is easily lost).
Out of the box I found I had to adjust the beam of the laser (using the two tiny set screws on the laser) so the beam exited straight out the laser and up the peep hole in the Nomadโs case.
Once collimated, the laser pointer has proved to be an accurate and convenient way to polar align, especially for shooting with wide-angle lenses. (Keep in mind, green laser pointers over 1 mw are illegal in some jurisdictions.)
The laser uses a removable and rechargeable 3.7-volt battery, and comes with a little USB-powered charger. The laser’s battery has lasted for months of momentary use. The laser works briefly in winter when it is warm, but as soon as it gets cold, as is true of most laser pointers, it refuses to lase!
This frames the small constellations of Sagitta the Arrow and Vulpecula the Fox. At lower left is the green planetary nebula Messier 27, aka the Dumbbell, shown in the close-up tracking test image below. This is a stack of 14 x 2-minute exposures with the Canon RF135mm lens on the Canon Ra, on the MSM Nomad tracker. The images were the best 14 out of a series shot to test the Nomad’s tracking.
However, for the more accurate polar alignment needed when shooting with telephoto lenses (an example is above), and for winter use, I prefer to use the optical polar scope, with the laser a handy complement just to get close to the pole.
The polar scope has a reticle etched with star patterns for both the North and South Celestial Poles. I found the latter worked well in Australia. The mounting clamp held the polar scope securely and consistently well centered, another welcome improvement over the polar scope clamp supplied with the Rotator, which could wiggle around.
Polar scope with its glow-in-the-dark Illuminator. The Nomad comes with an Arca-Swiss dovetail plate bolted onto the bottom edge, for attaching it to a tripod head or to the optional MSM Wedge.
The polar scope does not have an illuminator LED. Instead, it comes with a novel phosphorescent cap which you hit briefly with white light so it glows in the dark.
Placed over the front of the polar scope, it lights up the field allowing the reticle to be seen in silhouette. While it works fine for sighting Polaris, the bright field can make it hard to see the faint stars in Octans around the South Celestial Pole.
The Nomad on the Benro 3-Way Geared Head, using the Arca-Swiss attachment plate. Another method of mounting the Nomad to the Benro is shown below.
To aid polar alignment I purchased the Benro 3-Way Geared Head, also sold by MSM but available from many sources. Its geared motions make it easy to aim the trackerโs rotation axis precisely at the pole and hold it there solidly.
The Benro accepts standard Arca-Swiss mounting plates, so Iโve found it a useful head to have for other purposes and gear combinations. It has replaced my old Manfrotto 410 3-axis head which uses a proprietary mounting plate.
However, MSM also sells its own latitude adjustment Wedge which, at $90, is a cheaper alternative to the $200 Benro. Iโve not used the MSM Wedge, so I canโt say how solid and precise it is. But the Wedge is lighter than the Benro head, and so may be a better choice when weight is a prime consideration.
I would recommend either the Wedge or Benro for their fine adjustments of azimuth and altitude that are essential for easy, yet precise and stable polar alignment.
Tracking Accuracy
All-important is how well the Nomad tracks. When shooting with wide-angle lenses (14mm to 35mm) for nightscapes and wide Milky Way shots, the majority of images Iโve taken over the last few months, using exposures of 1 to 3 minutes, have been reliably well tracked, with pinpoint stars.ย
The Nomad begins tracking right away, with no wait for gear backlash to be taken up, or for the drive mechanism to settle in. I also found no tendency for tracking to be better or worse with camera position, unlike the Rotator that seemed to work better with the camera aimed at one area of sky vs another. And the Nomad didn’t suffer from any stalls or moments when it just stopped in its tracks, again unlike the problematic Rotator.
20 consecutive 2-minute exposures with a 135mm lens, to show the variations in tracking accuracy. Tap on the image to download it for closer inspection.
As with any tracker, where you do see mistracking is when using longer lenses. I tested, and indeed have used, the Nomad with 85mm and 135mm telephoto lenses, as many owners will want to do, for close-ups of Milky Way starfields and for so-called โdeepscapes.โ (An example of the latter is at the end.) The demo image above shows blow-ups of consecutive frames from the 135mm shoot of the Vulpecula/Sagitta starfield shown earlier.ย
In those more demanding tests, as I demonstrate here, I found that typically about 50% to 60% of images (taken with 1- to 2-minute exposures) were tracked well enough to be usable. The longer the focal length used, or the longer the exposures, the more frames will be trailed enough to be unusable in an image stack. And a well-tracked frame can be followed by a badly tracked one, then the next is fine again. Thatโs the nature of small drive gears.
As with other trackers, I would suggest that the Nomad is best used with lenses no longer than a fast 135mm. Even then, plan to shoot twice as many frames as youโll need. Half may need to be discarded. While I know some users will want to push the Nomad beyond its limits, I would not recommend burdening it with monster telephoto lenses or small telescopes. Like all other trackers, that’s not its purpose.
When there was mistracking it was usually in the east-west direction, due to errors in the drive mechanism, and not north-south due to flexure. (If it occurs, north-south drift is likely due to poor polar alignment.)
I found the Nomad did indeed turn at the sidereal rate to follow the stars, something I was never confident the Rotator actually did.
While you might think a 50% success rate with telephotos is not good, in fact the Nomadโs tracking performance is on par with other competing trackers Iโve used, from Sky-Watcher and iOptron. At wide-angle focal lengths the success rate proved closer to 100%.
So for a tracker as compact as the Nomad to perform so well is very welcome indeed. Itโs the main area where the Nomad beats the old Rotator by a long shot!
NOTE: While the MSM website mentions an “optional counterweight system,” as of my review’s publication date it is still being developed, MSM tells me. However, I don’t feel it will be necessary for the Nomad’s main purpose of wide-field imaging.
Mechanical Stability
Another flaw of the old Rotator was that it had several single-point attachments that, under the torque of a turning camera, could cause the camera to come loose and suddenly flop down.
Exploded view of the ratcheted mounting plate to attach a ball head to the NomadShowing the set screw to prevent the ball head coming loose
The Nomad uses a ratcheted clamp to attach a user-supplied ball head to the tracker body, and that clamp has an additional safety set screw to help ensure the ball head does not unscrew itself as a camera turns.
Iโve had no issues with cameras coming loose. Of course, the solidness of the ball head used will be critical as well. A large ball head can be better, but introduce some of the issues I report on below.
While MSM offers its own ball head, I have not used it, preferring to use a couple of other ball and pano heads I like, and that I show in the images here.
Simplicity of Operation
The Nomad improves upon the old Rotator by doing away with all its time-lapse features. You might think that eliminating features canโt be an improvement, but in this case it is.
I suspect few owners used the Rotatorโs preset functions for slowly turning a camera along the horizon while firing the camera shutter between each incremental time-lapse move (the very function that gave the company its name!). The Rotatorโs options for creating time-lapses were confusing to set up and limited in their choice of speeds. A serious time-lapse photographer would never use it.
(If you do want a tracker with time-lapse motion-control capabilities the Star Adventurer Mini works well. Its WiFi connection and mobile app allows a user to set all the factors needed for a good time-lapse: interval, angle increment, number of frames, and length of shoot.)
Instead, MSM has focused the Nomad on being just a star tracker, and I think wisely so. Its only controls are a three-position S-OFF-N switch, for using the Nomad in either the southern or northern hemisphere. It worked very well “Down Under,” with the exception noted below.
There is no solar or lunar drive rate, unnecessary in a tracker, and also no half-speed rate for nightscapes, used to lessen star trailing while also minimizing ground blurring. Iโve never liked using trackers at such a compromise half-speed rate, so I donโt miss it.
Using the optional V-Plate described below, I have used the Nomad to take tracked Milky Way panoramas, as shown here. It has worked very well for that purpose, with it easy to switch the tracking on (for the sky) and off (for the ground).
This is a 200ยฐ panorama of the arch of the northern Milky Way rising over Dinosaur Provincial Park, Alberta. Shot with the Nomad, with a blend of an untracked panorama for the ground and tracked panos for the sky.The gear used to take the panorama above, including the Alyn Wallace V-Plate, supporting an Acratech 2-axis pan head. The Nomad is ON here, set to N. Below the power switch is the USB-C port for charging and external power.
My only criticism is that the power switch is a little mushy and perhaps easy to slide on by mistake when it is packed in a bag.
An LED for each of the N and S directions glows red to indicate the power is on and the direction chosen, handy to help prevent you from choosing the wrong direction by mistake.
The Nomad is powered by an internal lithium battery that charges from any 5-volt USB charger (the Nomad comes with a USB-C cord, but no charger). The Nomad takes about 2.5 hours to charge to full and runs for 6 to 7 hours of continuous tracking at room temperatures. A second LED by the USB port glows yellow when the Nomad is charging, and green when it has fully charged.
In practice the Nomad has lasted for several nights of shooting on one charge. When the battery level is low, the red LED for the other direction begins blinking. As a backup in the field, the Nomad can be powered via its USB-C port by any external 5-volt power bank.
Collisions
The Nomad hasnโt been without issues, though the main problem Iโve had I canโt, in fairness, blame on the Nomad.
Due to the Nomadโs small size and shape, ball heads sit close to the Nomad body. Locks and clamps sticking out from ball heads can collide with the Nomad, or with the Benro head, as it rotates the ball head. Here I show how a collision can occur when aimed up at the zenith.
Showing the ball head colliding with the Benro when aimed high.
But collisions can also occur when aimed at the Celestial Pole. I ran into that issue in Australia, where many of the wide-field targets in the Milky Way (such as the field in Carina and Crux shown earlier) lie close to the South Celestial Pole.
A camera aimed toward the Celestial Pole (either South or North) is more likely to collide with the Nomad than when a camera is aimed toward the sky opposite the Pole.
Aimed toward the Celestial PoleAs it turns, the ball head hits the Nomad
As I show above, one night when tracking targets in Carina I found the ball head had jammed against the Nomad, seizing its motion. As I feared, that caused something inside the Nomad to come loose.
After the collision incident no frame was well-tracked. The Nomad was wandering all over the place!
From then on it failed to track well for any shots. The drive was wobbling the stars in random directions. No frame was usable. The Nomad was now out of commission, not a welcome prospect when you have traveled to the other side of the world to shoot the sky.
The access hole with a handy adjustment screw that fixed the issue.
What was the solution? There was only one point of adjustment accessible to users, a mysterious hole on the side of the tracker with a small hex screw at the bottom. This is normally covered by a rubber plug, though that was either missing on arrival or got lost along the way from my unit. Upon inquiry, MSM told me the screw is for use just at the factory, for a final adjustment of the gear and bearing distance.
But in my case, tightening it slightly seemed to do the trick, restoring normal tracking. However, my unit still tends to make intermittent clicking sounds now and then, though it seems to track well enough again.
The lesson here is donโt let gear collide with the Nomad. It likely has no internal clutch, making it unforgiving of being jammed.
Collision Avoidance
How do you avoid collisions? What I should have used in Australia was MSMโs optional V-Plate designed by the late and sadly missed Alyn Wallace.
Aimed toward the Celestial PoleAimed toward the zenith
I bought one a couple of years ago, but never thought to bring it with me on the Australia trip. As I show above, the V-Plate allows for much more freedom to aim a camera, either toward the Poles or straight up (as I show above), or low in the sky 180ยฐ away from the Pole, without fear of the ball head hitting other components.
The V-Plateโs shortcoming is that, despite cranking down the levers that hold it in position, it can still slip under the weight of a heavy camera sitting on the diving-board-like platform supported only on one end. The V-Plateโs locks are not as solid and secure as they should be. But with care it can work well. And you need buy only the V-Plate; not the Z-Plate.
I should note that since I got my V-Plate, it has been upgraded with a larger lever handle to aid tightening the tilt lock. However, it really needs another support point on the tilt adjustment, so it can’t move as readily under load.
V-Plate lock knob hard to get at and adjustV-Plate lock knob hitting the Polar Scope
In addition, MSM now offers a taller Arca-Swiss mounting block as an option, to replace the plate that comes bolted onto the Nomad with two Torx screws. That optional riser block moves the Nomad farther from the Wedge or Benro head, helping to prevent some collisions. By putting more space between the Nomad and the Benro head, the riser block makes it easier to get at the small locking clamp on the V-Plate’s rotation axis. But …
Shortly after I first published this review, a loyal reader (thanks, John!) pointed out his method of placing the Nomad on the Benro, with the Nomad turned 90ยฐ to the way I pictured it earlier. As I show below, this places the Benro’s lock knob on the side of the Nomad, not back. The benefit is that the V-Plate’s azimuth lock lever is now more accessible and well-separated from the Benro. That method makes the taller riser block unnecessary.
Here’s a reader-suggested alternative method for mounting the Nomad and orienting the Benro head that puts more space between the V-Plate and Benro, for ease of adjustment.
Even with this alternative method, the V-Plate tends to block the laserโs beam, as does a camera once it is mounted. The polar scope can also be blocked. Itโs an example of how one MSM accessory can interfere with another accessory, perhaps requiring yet another accessory to solve!
Laser beam hitting the V-Plate with it horizontalV-Plate rotated out of the way of the laser
In practice, with the V-Plate installed, polar alignment often has to be done before attaching the camera or setting up the V-Plate to the desired orientation. When adding the camera, care has to be taken to then not bump the Nomad off alignment. Thatโs why I like the Benro head as a stable platform for the Nomad, despite its extra weight.
As I illustrated earlier, the V-Plate is also an essential accessory for shooting tracked-sky Milky Way panoramas, as it allows a camera to be turned parallel to the horizon from segment to segment while it also tracks the sky.
A “deepscape” of the Sagittarius starclouds over Mt. Blakiston, in Waterton Lakes National Park, Alberta. This is a blend of two exposures: a single untracked 2-minute exposure at ISO 1600 for the ground, and a single tracked 2-minute exposure at ISO 800 for the sky, taken immediately after, with the Nomad tracker motor now on. With a 28-70mm lens at 70mm, on the rig shown.
Recommendations
So, as with the Rotator, when buying a Nomad, plan on adding several โoptionalโ accessories to your cart. They can, in fact, be essential.
However, they can add another $150 (for V-Plate + Wedge + riser block) to $250 (V-Plate + Benro head + riser block) to the total. These are in addition to the cost of the polar alignment aids offered in the various Basic bundles. I like having both the laser and polar scope, but for shooting just wide-angle nightscapes, the laser alone will do.
The cost of accessories makes the Nomad not quite the low-cost tracker you might have been sold on, nor as self-contained and compact as it first appears. Just choosing what combination of gear to buy can be daunting for beginners.
The Milky Way and its core region in Sagittarius and Scorpius over the Badlands of Dinosaur Provincial Park, Alberta. This is a blend of untracked exposures for the ground and tracked exposures for the sky, with the Canon Ra on the Nomad, with the Canon RF15-35mm lens at 20mm at f/2.8.
But when well-equipped, the little Nomad can work very well. Despite my run-in with a collision glitch, I can recommend the Nomad as a good choice for anyone looking for a solid, accurate, but portable tracker that can slip into any camera bag.
Just make room in your bag โ and budget! โ for polar alignment aids, V-Plates, wedges, and ball heads to complete your tracking kit.
And then donโt let anything collide with the Nomad!
โ Alan, June 27, 2024 – Revised June 28 / AmazingSky.com
I present a selection of new images taken at local World Heritage Sites, along with some advanced nightscape shooting tips.
I’m fortunate in living near scenic landscapes here in southern Alberta. Many are part of UNESCO World Heritage Sites that preserve regions of unique scenic and cultural significance. In early June I visited several to shoot nightscapes of starry skies over the scenic landscapes.
I also took the opportunity to experiment with some new shooting techniques. So I’ve included some tips and techniques, most of the advanced variety.
First up was Dinosaur Provincial Park.
The Milky Way and its core region in Sagittarius and Scorpius is here low over the Badlands landscape of Dinosaur Provincial Park, Alberta.
After nearly a month of rain and clouds, the night of May 31/June 1 proved wonderfully clear at last. I headed to a favourite location in the Red Deer River valley, amid the eroded badlands formations of Dinosaur Provincial Park, site of late-Cretaceous fossil finds.
The bright core of the Milky Way in Sagittarius would be in the south. With the night only three weeks before summer solstice, from the Park’s latitude of 50.5ยฐ N the sky would not get astronomically dark. But it would be dark enough to show the Milky Way well, as above in this framing looking south on the Trail of the Fossil Hunters.
However, May and June are “Milky Way Arch” months, at least for the northern hemisphere. The full sweep of the northern Milky Way, from Perseus in the northeast to Sagittarius in the southeast, then stretches across the sky โ high enough to be impressive, but low enough (unlike later in summer) to be framable in a horizontal panorama.
This is a 200ยฐ panorama of the arch of the northern Milky Way rising over the Badlands landscape of Dinosaur Provincial Park, Alberta.
To capture the arc of the Milky Way I shot a panorama โ in fact three:
one exposed for the ground
one exposed for the sky, but with the camera now tracking the sky to keep stars pinpoint
and a final sky panorama but with a specialized filter installed in front of the camera sensor to let through only the deep red light emitted by nebulas along the Milky Way
Rig for tracked panoramas with the MSM Nomad tracker
The image above shows my rig for taking tracked panoramas. The rectangular box is the little Nomad sky tracker from Move-Shoot-Move (MSM), here equipped with its accessory laser pointer to aid the “polar alignment” that is needed for this or any tracker to follow the turning sky properly.
A review of the MSM Nomad will be forthcoming (subscribe to my blog!). However, I’ve found it works very well, much better than MSM’s original Rotator tracker, which was entirely unreliable!
On top of the little Nomad is an Acratech pano head, so I can turn the camera by a specific angle between each pano frame, both horizontally from segment to segment, and vertically if needed when raising the camera from the ground pano to the sky pano.
The pano head is on a “V-Plate” sold by MSM and designed by the late, great nightscape photographer (and engineer by trade), Alyn Wallace. The V-Plate allows the camera to turn parallel to the horizon when on a tipped-over tracker. The entire rig is on a Benro 3-Axis tripod head (also sold by MSM, but widely available) that makes it easy to precisely aim the tracker for polar alignment and then hold it rock steady.
The H-Alpha Panorama rendered in monochrome
I’d taken many panos before using sets of untracked ground and tracked sky panoramas. New this night was the use a “narrowband” Hydrogen-Alpha filter to take a final pano that brings out the red nebulas. I used a filter from Astronomik that clips into the camera in front of the sensor. Such a filter has to be used on a camera that has been modified to be more sensitive to deep red light, as the Canon Ra shown below is (or was, as Canon no longer makes it).
While a modded camera brings out the nebulas, using an H-Alpha filter as well really shows them off. But using one is not easy!
Astronomik clip-in filters, the 12nm H-a on the right
The clip-in placement (unlike a filter in front of a lens) requires that the lens be refocused โ infinity focus now falls at the 3 to 6 metre point (the focus shift varies with the lens and focal length โ the wider the lens the greater the shift). With the image so dark and deep red, seeing even a bright star to manually focus on is a challenge.
Shifting the lens focus also changes the overall image size (called “focus breathing”) and often introduces more off-axis lens aberrations, again depending on the lens.
So, blending the H-Alpha pano (which I rendered out in monochrome, above) into the final stack is tough, requiring lots of manual alignment, image warping, BlendIf adjustments, and masking. This is where I added in the red colouration to taste. Careful here, as the “Saturation Police” patrolling social media will issue tickets if they judge you have exceeded their “speed limit.”
The complete panorama with Photoshop layers and adjustments
The final pano required a complex blend of image and adjustment layers, all applied non-destructively, so the many elements of the scene can be individually tweaked at any time.
The work was worth it, as the final pano records the deep red nebulas contrasting with the deep blue of a sky still lit partly by twilight, a magenta aurora to the north, and bands of green and yellow airglow, all above the earth tones of the Badlands. It is one of my favourite nightscape panoramas.
As a further note on software: For stitching panos I try to use Adobe Camera Raw first. It can work very well. But complex panos, especially taken with very wide lenses, often require the specialized program PTGui, which offers more choice of pano projection methods, cleaner stitching, and control of panorama framing and levelling.
Next up was Writing-on-Stone Provincial Park.
A week later, with the waxing Moon beginning to appear in the western sky and the promise of clear nights, I headed south to the 49th parallel borderlands of the Milk River and Writing-on-Stone Provincial Park, known as รรญsรญnai’pi to the Blackfoot First Nation who revere the site as sacred.
My plan was a framing of the galactic centre over the Milk River valley and distant Sweetgrass Hills in Montana, perhaps using the H-Alpha filter again. But clouds got in the way!
A 13-segment panorama of the landscape and sky just as the Sun sets over Writing-on-Stone Provincial Park (รรญsรญnai’pi) in Alberta.
When you are faced with a cloudy sky, you make use of it for a colourful sunset. I like shooting panoramas at such sites as they capture the grand sweep of the “big sky” and prairie landscape. Above is the scene at sunset.
A 14-segment panorama of the landscape and sky at sunset at Writing-on-Stone Provincial Park.
Above is the same scene a few minutes later as the Sun, though now set, still lights the high clouds with its red light, mixing with the blue sky to make purples. On the hill at right, a couple admires the sunset, adding a human scale to the vast skyscape.
This pano was with the Canon RF15-35mm lens at 15mm and the camera in portrait orientation to capture as much of the sky and ground as possible in a single-row pano.
A 13-segment panorama of the sandstone landscape in blue-hour twilight at Writing-on-Stone Provincial Park.
I finished the evening with another panorama, but using a Canon RF70-200mm telephoto lens at 70mm to zoom in on the Sweetgrass Hills in the deepening twilight.
Rig for untracked panoramasPanorama head close-up
For these panoramas, exposures were short, so I didn’t need to track the sky. I used another combination of gear shown above. An Acratech ball head sits atop another style of panorama head that has adjustable click stops to make it easy to move the camera from segment to segment at set angles. When the lighting is changing by the second, it helps to be quick about shooting all the pano segments. Such pano heads are readily available on Amazon.
That pano head sits atop an Acratech levelling head (there are many similar units for sale), an essential addition that makes it easy to level the pano head so the camera turns parallel to the horizon. Any tilt will result in a panorama that waves up and down, likely requiring fussy warping or cropping to correct. Avoid that; get it right in-camera!
A single-image portrait of a sunset sky with the waxing two-day-old crescent Moon amid colourful clouds over the prairie.
As the sky lit up, I also shot the crescent Moon above the sunset clouds and prairie scene. While the clouds made for a fine sunset, they did not clear off, thwarting my Milky Way plans this night. I headed back to Milk River, to travel farther west the next day.
From Writing-on-Stone I drove along scenic Highways 501 and 5 to Waterton Lakes National Park.
A nightscape scene under a twilight “blue-hour” sky, on the Red Rock Canyon Parkway in Waterton Lakes National Park, Alberta, looking west toward the sunset with the four-day-old crescent Moon.
After an initial cloudy night, I made use of the (mostly) clear night on June 10 to shoot twilight scenes with the now four-day-old crescent Moon in the evening sky. Here I wanted to play with another technique I had not used much before: focus stacking.
To keep exposures short (here to minimize the blurring effects of the constant wind at Waterton) you have to shoot at wide apertures (f/2 in this case). But that produces a very shallow depth of field, where only a small area of the image is in focus.
So I shot a series of six images, shifting the focus from near (for the foreground flowers) to far (for the mountains and sky). Photoshop has an Auto Blend function that will merge the images into one with everything in focus. I also shot separate images exposed for the bright sky, shooting a vertical panorama โ dubbed a “vertorama” โ moving the camera up from frame to frame.
I shot an additional short exposure just for the Moon, to prevent its disk from overexposing too much, as it did in the twilight sky images.
Twilight sky assembly and layers in Photoshop
So what looks like a simple snapshot of a twilight scene is actually a complex blend of focus-stacked ground images, panoramic sky images, and a single short image of the Moon replacing its otherwise overly bright disk. But the result better resembles what the eye saw, as single exposures often cannot record the range of brightness the eye can take in.
A nightscape scene under a moonlit sky, on the Red Rock Canyon Parkway in Waterton Lakes National Park, Alberta, looking back along Pass Creek to the south, with the Milky Way rising at left.
About an hour later, from the same location, I shot the other way, toward the Milky Way rising over Vimy Peak, but the sky still lit blue by moonlight. This, too, is a blend of focus-stacked ground and panorama sky images. But the camera was on a fixed tripod for exposures no longer than 15 seconds. So I didn’t use the tracker.
And here the longer exposures do pick up more (colours, fainter stars, and brighter ground detail) than was visible to the eye. Revealing more than the eye can see is the essence and attraction of astrophotography.
A vertical panorama of the moonlit spring sky with the Big Dipper and Arcturus over the jagged outline of Anderson Peak at the Red Rock Canyon area of Waterton Lakes National Park, Alberta.
Heading down the Red Rock Canyon Parkway, I set up the tracker rig for the darker sky, now that the Moon was nearly setting. I shot a vertical panorama, with two untracked ground segments and four tracked sky segments, to capture Arcturus and the Big Dipper over the iconic Anderson Peak.
Comparing without and with LENR โ Lots of coloured specks without LENR! Tap to zoom up.
For all the images at Waterton and Writing-on-Stone I used the 45-megapixel Canon R5 camera, great for high resolution, but prone to noise, especially colourful thermal hot pixels. (See my review here.)
For all the long exposures I turned on Long Exposure Noise Reduction, a feature most cameras have. LENR forces the camera to take a “dark frame,” a second exposure of equal length, but with the shutter closed. The camera subtracts the dark frame (which records only the hot pixels) from the previous light frame. The final image takes twice as long to appear, but is much cleaner, as I show above. So a two-minute exposure requires four minutes to complete.
While there are clever ways to eliminate hot pixels later in processing (using Photoshop’s Dust and Scratches filter), doing so can blur details. I’ve long found that doing it “in-camera” always produces better results.
The Milky Way rising over the peak of Mt. Blakiston, in Waterton Lakes National Park, Alberta, Canada.
With the Moon now down, I turned the camera the other direction toward Mt. Blakiston, to capture the star clouds of the summer Milky Way rising behind the mountain, in an example of a “deepscape,” a nightscape with a telephoto lens. This is another technique I’ve not used very often, as the opportunities require good location planning and timing, transparent skies, and a tracker. Apps like ThePhotographersEphemeris coupled with TPE3D, and PlanItPro can help.
Deepscapes frame landscape fragments below some notable deep-sky objects and starfields, in this case a region with several “Messier objects” โ nebulas and star clusters well-known to amateur astronomers.
This was a blend of one untracked and one tracked exposure, again on the Nomad. Taking more frames for stacking and noise reduction, while a common practice, was not practical here โ at this focal length of 70mm the sky was moving enough that the mismatch between sky and ground would make blending tough to do.
And the reality is that today’s AI-trained noise reduction software (see my test report here) is so good, image stacking is not as essential as it once was.
For many of the Waterton images I used the Canon RF28-70mm lens, usually wide open at f/2. For the image below I used the RF15-35mm lens at its maximum aperture of f/2.8. (See my test report on these lenses here.)
The stars and clouds trail across the sky over Cameron Lake in Waterton Lakes National Park, Alberta, and Mt. Custer across the border in Glacier National Park in Montana.
On my final night in Waterton I drove the Akamina Parkway to Cameron Lake, located in extreme southwest Alberta on the borders with British Columbia and Montana. The glaciated peak to the south is Mt. Custer in Glacier National Park, Montana.
Again, I had hoped to get a deepscape of the photogenic starfields in Scorpius above Mt. Custer. But as is often the case at this site, clouds wafting over the Continental Divide defeated those plans. So Plan B was a set of long exposures of the clouds and stars trailing with the last light of the low Moon lighting parts of the scene. Chunks of ice still drift in the lake.
This is a blend of separate multi-minute exposures for the ground and sky, all at the slow ISO of just 100, and all untracked to purposely create the star trails, not avoid them.
So over a total of four nights at these wonderful World Heritage Sites, I was able to try out some new shooting techniques:
H-Alpha blending
Focus stacking
Deepscapes
As well as panoramas, both horizontal and vertical
Every nightscape outing is a learning process. And you have to be prepared to change plans as the clouds dictate. I didn’t get all the shots I had hoped to, but I still came away with images I was very pleased with.
AI-based noise reduction programs continue to improve, to provide remarkable results on many images. But โฆ how well do they work on star-filled astrophotos?
As we know, software evolves rapidly. So hereโs my latest look at versions of those programs current of as May 2024, plus new entries into the category, all with a focus on how well they perform on a variety of astrophotos. Only two programs tested here, NoiseXTerminator and GraXpert, are specifically designed to be used on astrophotos, primarily telescopic images of deep-sky objects.
The other programs on test are general purpose, for use on noisy images such as wildlife photos shot at high ISOs to freeze motion, or any photos shot under low light. But the latter includes nightscapes.
I tested programs in three categories, defined primarily by how they are used in a processing workflow:
Adobe DeNoise AI in Camera RawDxO PureRAW 4 stand-alone app
General programs usable only on Raw files at the start of a workflow:
Adobe DeNoise AI from within Adobe Camera Raw (v16.3) or Lightroom (v13.3)
DxO PureRAW 4 (v4.1), a stand-alone app only
Luminar Neo Noiseless AION1 NoNoise AI 2024Topaz Photo AI
General programs usable as stand-alone apps on Raw files, but also as plug-ins for Photoshop for use later in a workflow (I tested both workflows):
Luminar Neo (v1.19.1) and its Noiseless AI filter
ON1 NoNoise AI 2024 (v18.3)
Topaz Photo AI (v3.02)
GraXpert stand-alone app
Programs specialized for astro work:
RC-Astro NoiseXTerminator (v1.1.3), usable only as a Photoshop plug-in
GraXpert (v3.0.2), usable only as a stand-alone application
(The latter two can also be installed as โprocessesโ accessed from within the specialized astrophoto program PixInsight; I did not test that workflow.)
Comparing ACR’s standard noise reduction to 5 AI-based noise reduction programs
MY METHODS (โBUT WHAT ABOUT โฆ?โ)
I tested the five general-purpose programs on four types of astrophotos:
Nightscapes
Aurora images
Total solar eclipse images
Deep-sky images, both wide-field and telescopic
I tested the two specialized programs only on sample deep-sky photos, the types of images they are designed and trained for.
In all cases, the test images are single frames. I did not stack any images for these examples, as I wanted to show what the programs could do with noisy originals.
I tested only on Raw files from mirrorless cameras. I did not test on FITS files from specialized cooled astronomy cameras, as those require a quite different workflow and software.
Anticipating the โWhat about โฆ?โ question โ no, I did not test Topaz DeNoise AI. While popular among astrophotographers, both it and its companion program, Sharpen AI, were discontinued in 2023, in favor of Topaz concentrating on their single program, Photo AI, that can de-noise, sharpen, and upscale.
I made an exception for Luminar Neo. While it includes general processing functions, it is used more often (certainly by me!) just as a plug-in for its AI-driven effects and filters, noise reduction being one.
PLEASENOTE:
All the test images are full-resolution JPGs (6,000 to 8,000 pixels wide) that you can download (by right-clicking) for detailed inspection. You will often need to do so, to see the pixel-level differences I refer to.
But the sizes of the images make the blog page slow to load initially. Patience, please!
All images are ยฉ Alan Dyer, so any publication or posting elsewhere requires my permission, please and thank you! Just link to this blog if you wish to share the review.
DxO PureRAW can be called up from within Adobe Bridge by going to File>Open With โฆ and choosing DxO PureRAW.
In Lightroom, the route to send images to PureRAW is File>Plug-In Extras>Process and Preview with DxO PureRaw 4. You cannot choose Photo>Edit In โฆ as you might do to send images to other programs.
TL;DR SUMMARY (with links to the software websites)
Of the two Raw-only programs, Adobeโs DeNoise AI and DxOโs PureRAW 4, both worked well, with v4 of PureRAW much improved over its earlier artifact-prone v2 I tested and dismissed in 2022. Similarly, unlike its early version, Adobe DeNoise AI did not invent structures, such as auroral arcs.
Adobeโs DeNoise AI brought out details in the shadows much better than DxOโs PureRAW 4, which blocked up shadows. But PureRAW produced sharper details in illuminated landscapes, yielding less of the plastic appearance that Adobe DeNoise is still prone to. However, both programs turned star trails into wiggly worms.
Each of the three other general-purpose programs failed as stand-alone apps when importing Raw files, then exporting them as either Raw DNG (Digital Negative) files (ON1 NoNoise AI and Topaz Photo AI), or as TIFF files (Luminar Neo). Their exported images were either dark, vignetted, or hugely shifted in color or tonal balance. Results with that Raw-to-DNG/TIFF workflow were often unusable.
However, the same three programs (Luminar Neo, ON1 NoNoise AI and Topaz Photo AI) worked well as plug-ins from within Adobe Photoshop. Images now looked fine, with ON1 NoNoise producing what I thought was the best overall noise reduction with the fewest artifacts and โpatchinessโ in most examples. Luminar Neoโs Noiseless AI was consistently the poorest performer in all cases. Itโs the program I can rule out of the running for noise reduction.
The two specialized astro programs, NoiseXTerminator and GraXpert, did a fine job on deep-sky images, reducing fine-grained noise without eliminating stars, just what they are โtrainedโ to do. However, I felt NoiseXTerminator did the better job, with the new (as of May 2024) GraXpert 3.0 softening stars or leaving residual mottled artifacts. Neither worked well on nightscapes โ while they didnโt harm detail too much, other programs performed better on what are often detailed but dark and noisy foregrounds.
My main takeaway โ No one piece of AI software works best on all astrophotos. A program that provides great results on one image or class of image might perform poorly on another image. That’s the nature of AI-driven processing.
So … my overall conclusion and personal workflow picks? โ
Adobe DeNoise AI would be my first choice for noisy nightscape images, where it has to be applied early in the workflow. It will be worth trying on deep-sky images.
DxO PureRAW might work better on some nightscapes with lots of ground textures.
ON1 NoNoise AI works well on many images when applied as a plug-in later in the workflow, but its sliders often need adjusting from the defaults.
NoiseXTerminator remains my preferred plug-in for deep-sky images.
PLEASENOTE:
I have not provided prices and explained buying options, as frankly some can be complex!
For those details, go to the softwareโs website by clicking on the links in the names above. With the exception of Luminar Neo, all are available as free trial copies.
All programs are available for Windows and MacOS. I tested the latter versions, on an M1 Max MacBook Pro.
A typical test image, showing the small section that the comparison examples zoom in on. This is the first image shown below in detail.
RAW-ONLY PROGRAMS โ NIGHTSCAPES
To provide evidence for my conclusions, I focus first on the two Raw-only programs, Adobe DeNoise AI and DxO PureRAW 4, as they produced by far the best results of all the programs on demanding nightscapes, often remarkably so. They not only reduce noise, they also recover fine details with AI sharpening you cannot turn off. How well that works is what I demonstrate below.
In each of the following examples, I show the two programs compared to an image processed in Adobe Camera Raw (ACR) using the Detail panelโs old non-AI adjustments for sharpening and noise reduction.
I developed all the images in ACR, then sent them through Adobeโs DeNoise AI option or into DxO PureRAW. Both options produce new raw DNG files, with all the develop settings intact and accurate, with some exceptions with PureRAW as shown below.
Peyto Lake Nightscape
Peyto Lake corner closeup โ with Canon R5 at ISO 3200
In most cases I show only a section of images blown up by 250% to 500%. Here, in the first example of a nightscape shot I zoom in on a corner, as illustrated above, where noise often lurks due to lens vignetting. (I shot this and many of the nightscape examples with the 45-megapixel Canon R5. See my test of it for astrophotography here.)
The standard ACR noise reduction leaves a blizzard of fine noise and large color blotches. The Adobe DeNoise AI version (with it at 60%, the setting I used for all the DeNoise images) shows much less noise and somewhat reduced color blotches. The PureRAW version shows even better noise reduction, but the trees turn very dark with no detail.
But compare the mountainside. Adobe turns the rock layers into artificial-looking ropey bands; PureRAWโs detail recovery looks much more natural for texture.
Lake Edith Nightscape
Lake Edith corner closeup โ with Canon R5 at ISO 5000
In this example, I again zoom in on a badly underexposed corner. The standard ACR version looks awful, riddled with color splotches and banding. The Adobe DeNoise version has cleaned up most of the mess. But the PureRAW version is better, eliminating even more noise and artifacts.
So is PureRAW better? Not so fast!
Storm Mountain Nightscape
Storm Mountain corner closeup โ with Canon R5 at ISO 100
In this close-up of the Storm Mountain twilight image (that I show in full farther down the page), the normal image shot at ISO 100 isnโt marred too much by noise. But it does exhibit the magenta discoloration often seen in underexposed frame corners when the shadows are โliftedโ brighter, as I show in the inset of the Basics panel.
The Adobe DeNoise version automatically corrected the color back to normal (I made no manual adjustments) and brought out the fine details. By comparison, PureRAW turned the trees completely dark, a lazy way to reduce noise! I tried further lifting the shadows with some reverse vignetting (as shown), but the result was a muddy mess. PureRAW crushed the shadows to the point no detail was recoverable.
So is Adobe better? Not necessarily ….
Lake Louise Nightscape
Lake Louise close-up โ with Canon R5 at ISO 1600
Here I zoom in on famous Mount Victoria at the end of Lake Louise in Banff, in a one-minute exposure taken for the ground. As before, I think PureRAW has done a better job at recovering details in the mountain, though maybe to the point of over-sharpening? Adobe DeNoise perhaps looks more natural here.
But look at the star trails, which we sometimes want in our nightscapes, or have whether we want them or not! Yes, the sky in the AI-processed images looks less noisy, but the star trails now look like wiggly irregular streaks. PureRAW is a little worse, but both programs suffer from the same AI misinterpretation of the content. Both ruined the sky.
Will this always be the case?
Sierra Cabins Nightcape
Sierra Cabins close-up โ with Fuji GFX100S at ISO 3200
All the other image examples are from Canon mirrorless cameras: the EOS R, Ra or R5. But this is a blow-up of a 100-megapixel photo from a medium-format Fuji GFX100S. The rustic cabin and the sky is less noisy in the AI images, with PureRAW the better performer here by a small margin. Stars look fine, and the AI sharpening of both programs has brought out the faint stars without any artifacts, a welcome improvement I think.ย
RAW-ONLY PROGRAMS โ AURORA
I include this as a separate example, as an aurora photo provides a sky with a different type of content. In the past Iโve seen Adobe AI invent aurora rays.
Aurora Curtain
Aurora close-up โ with Canon Ra at ISO 1600
This is an image from the Great Aurora show of May 10, 2024. Thereโs less noise in the AI versions of this example, and both programs also eliminated the errant hot red pixel at lower right in the ACR image. Iโve found these two AI programs can correctly identify and eliminate some hot pixels, though hot pixel removal can be hit or miss.
In all, I found the AI routines of Adobe and DxO did a fine job on auroras, reducing noise without introducing artifacts such as banding or posterized color gradations. Neither overly sharpened foreground details, nor added structures into the aurora or clouds that shouldnโt be there or that look unrealistic.
RAW-ONLY PROGRAMS โ SOLAR ECLIPSE
Many of us have close-ups of the April 8, 2024 total eclipse of the Sun. Even though you might have shot them at a low ISO (even when eclipsed, the Sun is bright), you might have been surprised to see how much fine noise remains in the corona and sky.
Solar Eclipse Corona Close-Up
Corona close-up โ with Canon R5 at ISO 100
This is a close-up of a frame taken through a 105mm f/6 refractor at a focal length of 630mm. Even at ISO 100, thereโs a pixel-level granulation visible, but in this case I donโt think either Adobe DeNoise or PureRAW provided much of an improvement, likely because this is a low-ISO original.
In fact, I think Adobe DeNoise AI made noise worse, as its inherent sharpening added some dark flecks throughout the corona. But neither program introduced any banding, unlike Topaz was guilty of below.
RAW-ONLY PROGRAMS โ DEEP-SKY
Here I compare the two Raw-only programs on several examples of deep-sky images โ photos of the Milky Way and nebulas taken with tracking mounts so the stars remain pinpoints, ideally! These examples are tough tests, as the AI models have likely received little training on what these are supposed to look like! And faint stars can look like noise.
Orion Portrait
Orion close-up โ with Canon Ra at ISO 800
First is a wide-angle portrait of Orion, blowing up the center of a tracked exposure with a 28-70mm zoom lens set to 46mm. (See my test of Canon RF zoom lenses here.) Shot at ISO 800, low for deep-sky images, this single frame is fairly clean to begin with. The AI programs do smooth the noise, without wiping out stars. Nice!
But they do accentuate the residual chromatic aberration (the blue haloes) on stars. PureRAW looks a little worse as it seems to have shifted the color to more magenta. All three Raw files have identical settings and profiles applied, yet PureRAW looks slightly different.
Cygnus H-alpha Monochrome
Cygnus close-up โ with Canon Ra at ISO 3200 with Astronomik 12nm H-a clip-in filter
This is a more demanding example, shot with the same lens but at 70mm, and with the red-sensitive Canon Ra. It is rendered in monochrome as it was shot through a deep-red hydrogen-alpha filter to isolate the red light from the nebulas, here in Cygnus.
This is a single frame (you would normally stack lots of these!), very noisy due not only to the high ISO used, but also because only the red pixels (one quarter of the total on the sensor) recorded any signal.
Both Adobe DeNoise AI and DxO PureRaw have cleaned up the noise well. PureRAW has added more sharpening, tightening the stars and enhancing fine structure. Whether this is good or not depends on your goals and tolerance for AI-induced changes. In this case, I donโt think it has invented details.
But then thereโs this example โฆ.
Vela Supernova Remnant
Vela SNR close-up โ with modified Canon R at ISO 3200
This, too, is a filtered single frame, taken through a 61mm-aperture telescope equipped with a โdual narrowbandโ filter which isolates the red H-alpha wavelength, but also the cyan Oxygen emission lines prominent in supernova remnants like this one in Vela. The deep filter requires shooting at a high ISO. So thereโs lots of noise.
In this trio, I also applied NoiseXTerminator to the left image, an AI-based noise reduction program designed for just such images. I show more examples with โNoiseXโ at the end.
I donโt think Adobe DeNoise or PureRAW have done any better job than NoiseX at reducing noise. If anything, each might have added some additional texturing that looks artificial, and accentuated chromatic aberration haloes on the stars. NoiseX wins here, right?
Well โฆ look at the fine structures of the wisps of nebulas in all three panes. In the two panels at center and right, you can see more structure in the nebulosity, such as the protruding red fingers at top, that are not there in the NoiseX version at left. Is this real? Might other sharpening routines later in the workflow have brought it out anyway? Or are these details the products of AI imagination!?
Before purists dismiss the Adobe and DxO AI programs for fabricating details, hereโs another example.
Crab Nebula
Crab Nebula close-up โ with modified Canon R at ISO 800
This is another supernova remnant, the famous Crab Nebula in Taurus. It is a 500% blow-up of the center of a single exposure with a modified Canon R on a 120mm f/7 refractor.
In this case, the โnormal” image on the left has had just ACRโs old-style noise reduction applied, nothing else. In the middle and on the right, the Adobe and DxO AI versions are noticeably less noisy.
But โฆ the small red tendrils are also more obvious with AI enhancement โ and they are real (as comparisons to other more detailed astrophotos showed me). So here the AI has helped bring out subtle details while smoothing noise. I think PureRAW has sharpened stars a little too much, and shifted the colors, again to magenta.
Summary Points:
Both Adobe DeNoise AI and DxO PureRAW 4 can work wonders on nightscapesโฆ
โฆ Except on star trails! Both programs ruin star trails.
Their improvements to low ISO images is not so great, if minimal.
In its conversion of Raw to DNG, PureRAW sometimes introduced minor and unwelcome changes to imagesโ brightness and color. Adobe DeNoise did not.
But PureRAW recovered details in textured landscapes much better than DeNoise, which can suffer from plastic looking artifacts.
Both programs are worth trying on deep-sky images, if your workflow allows working with Raw files.
But you have to look carefully at the details โ pixel peep! โ as you might see oddities introduced by either program that you feel are unacceptable. Or you might see welcome sharpening, saving you more work later in processing.
Recommendations:
Adobe DeNoise AI has the advantage that if you are an Adobe Cloud subscriber you already have it. It is included with Lightroom and Camera Raw. So try DeNoise AI; you might like the results. Or not! But as with DxO PureRAW, it can be applied only to Raw files and only at the start of a workflow.
Download the trial copy of DxO PureRAW and test it on your own images. You might prefer it in your workflow.
OTHER PROGRAMS โ WORKING STAND-ALONE ON RAW FILES
Now I test Luminar Neo Noiseless AI, ON1 NoNoise AI, and Topaz Photo AI โ three AI noise reduction programs that can work not only on Raw files but on other file formats, allowing them to be applied at various points in a workflow.
All three programs can read Raw files from a wide range of cameras. Like PureRAW, ON1 and Topaz can also export DNG files, Adobeโs universal version of a Raw file. The best format Luminar can export to is a 16-bit TIFF.
I sent all the raw images Iโve shown above, plus a dozen more Iโm not showing, through all three programs working as stand-alone apps, similar to how PureRAW operates. I usually applied their default or auto settings for noise reduction, and also for sharpening, as both Adobe and DxO also sharpen โ you canโt have them not sharpen. I wanted to compare like to like.
Aurora Curtain
Aurora Curtain with three programs as stand-alone apps
The exported files from all three programs showed noticeable differences in brightness and color on this aurora example from the May 10, 2024 display. Again, all have had the same develop settings applied to them as were applied to the original file in Camera Raw. Topaz shows over-sharpening, but that can be turned down from the usually excessive level chosen by its โAuto Pilotโ routine.
Aurora over House
Aurora over House with three programs as stand-alone apps
Another aurora example also shows significant differences in brightness, color and contrast. Auroras are particularly sensitive to shifts in white balance and to the camera profile chosen. In this case the profile was Camera Neutral. Only Luminar honored that profile; ON1 and Topaz offered only a generic Color profile in their DNGs. Luminar did not apply the lens correction for the Venus Optics 15mm lens used here, as it was not in its database. So its image looks dark and vignetted, requiring manual adjustments.
Peyto Lake Nightscape
Peyto Lake nightscape with three programs as stand-alone apps
The differences became even more marked on some of my test nightscapes. In this ISO 3200 Canon R5 image from Peyto Lake in Banff only Topazโs exported DNG succeeds in resembling the original developed Raw file from ACR. Luminarโs TIFF is far too dark and ON1โs DNG is way too bright and contrasty. What happened there?
Storm Mountain Nightscape
Storm Mountain twilight scene with three programs as stand-alone apps
Another example, shot at ISO 100 with the Canon R5, also shows major disparities between the original Raw files and the exported images, with Luminarโs now looking the closest, ON1 still too bright and contrasty, and Topazโs way too dark. There is no predicting what youโll get.
I think the differences might be due to how each program interprets the camera profile used, but the reason is a mystery.
Summary Points:
Unlike DxO PureRAW 4, none of these three programs can be used in practice as stand-alone noise reduction apps, at least not with reliable results.
Recommendations:
Use Luminar Neo, ON1 NoNoise AI and Topaz Photo AI only as plug-ins, at least for noise reduction. Thatโs what I test next.
THE SAME TRIO โ AS PLUG-INS WITHIN PHOTOSHOP
Thankfully, when I used the same three programs called up from within Photoshop as filter plug-ins, all worked well, though with varying levels of noise reduction quality.
All three can also be called up from within Adobe Lightroom.
Sending images to Plug-Ins with Lightroom, using Edit in ….
However, for the latter, do not use the route I advised at the beginning for DxO PureRAW. Do not send images to them via File>Plug-In Extras โฆ. While that will work, youโll get the same bad results I show in the previous section when using the programs as stand-alone apps.ย
Instead, as I show immediately above, from Lightroom, use Photo>Edit Inโฆ and choose your plug-in. That will produce the same good results I show below.ย
An even better method is to choose Photo>Edit In>Open as Smart Object in Photoshop. You can then apply these or any plug-in as a non-destructive โsmart filter,โ with settings you can re-adjust at any time, rather than being โbaked intoโ the resulting TIFF file. Thatโs what I did for the tests below.
I can hear the anti-Adobe faction clamouring! For those who do not use Photoshop, all three programs will also install as plug-ins into Affinity Photo 2, a very Photoshop-like layer-based editor available under a perpetual license at low cost. However, I did not test that workflow variation.
Peyto Lake Nightscape
Peyto Lake close-up โ with Canon R5 at ISO 3200
Here, on blow-ups of a noisy frame corner, I show the settings I used. Most are default, except for ON1 where I backed off its Tack Sharp Deblur from the 100 it had picked. While ON1 NoNoise ostensibly has an Auto function for detecting and applying an amount of noise reduction and sharpening suitable for each photo, it often picks 100%.
However, ON1 NoNoise AI did the best job. Topaz Photo AI still left noise in the foreground. Luminar Noiseless AI wasnโt bad, but left a noisier sky with some patchy artifacts.
Aurora Curtain
Aurora Curtain โ with Canon Ra at ISO 1600
On the aurora example, I also applied Photoshopโs old Reduce Noise filter to the image brought in from Camera Raw. It can do a good job smoothing fine-scale noise.
With that conventional filter applied I found there wasnโt a big difference among the four versions. The three AI programs did a good job, with ON1 and Topaz better than Luminar, which still left some noise. Topaz over-sharpened the stars and trees, leaving colorful ringing artifacts on the latter. And that was with its Sharpen filter backed off to 30 from the 50 the Auto Pilot routine suggested using.
Vela Supernova Remnant Deep-Sky
Vela SNR close-up โ with modified Canon R at ISO 3200
Luminar Noiseless AI improved this noisy frame by only a small degree. ON1 and Topaz were much better, providing good noise reduction without adding significant artifacts or odd โinventedโ structures. As usual, Topaz sharpened stars by default, and perhaps a little too much.
Cygnus Starfield Deep-Sky
Cygnus close-up โ with Canon Ra at ISO 1600
This star-rich field taken with a 70mm lens tests how well the programs can retain tiny stars while smoothing noise. Luminar left stars intact but didnโt provide much better noise reduction over what Camera Rawโs old manual noise sliders produced.
ON1 did provide a smoother background sky. But retaining faint stars required backing off Luminance noise reduction and increasing Enhance Detail to bring back the faint stars it wiped out with its default settings. Boosting Deblur and Micro Contrast can add ugly haloes on stars. So, with a deft touch to the sliders the results with ON1 can be very good, with the added benefit that it appears to reduce residual chromatic aberration around stars without affecting star colors.
With Topaz, sliding up Original Detail helped bring back stars lost to noise smoothing. However, there was an odd general reduction in contrast over the image.
Solar Eclipse Corona Close-Up
Corona close-up โ with Canon R5 at ISO 100
Each program handled this low-ISO file a little differently. Luminar seemed to actually increase noise, adding coarser structures and some banding. ON1 was the smoothest, with noticeably less noise than the original Camera Raw image. Topaz left (or added?) some fine scale color noise. It sharpened the lunar limb very well, though with a slight dark halo.
But the real revelation was when I zoomed out to look at the darker sky beyond the brightest parts of the corona.
Solar Corona Banding Artifacts
Corona sky close-up โ with Canon R5 at ISO 100, showing Topaz banding artifacts
Topaz Photo AI introduced very noticeable banding in the form of square blocks, an artifact of how AI programs analyze images in โtiles.โ I did see this in other photos processed with Photo AI, in areas that should look smooth. The culprit is the noise reduction; turn it off and the banding goes away, but now you have noise!
In this case, Topazโs noise reduction ruined the image, though its sharpening was useful. Overall, I think ON1 NoNoise AI 2024 was the winning plug-in for noise reduction. But Iโve used Photo AI to sharpen solar prominences.
Summary Points:
All three programs worked well as plug-ins, with none of the extreme shifts in color or tone shown in the previous section in the stand-alone app exports.
However, even as a plug-in I felt Luminar Neoโs Noiseless AI filter consistently produced the worst results, or often little benefit at all.
Topaz Photo AI can produce good results, but watch for banding artifacts and over-sharpening. I also found that Topaz was prone to crashes and lock-ups, requiring force-quitting.
ON1 NoNoise AI 2024 provided the best overall noise reduction among these three plug-ins. The 2024 version is much improved over the 2023 version which had a High Detail mode that was awful! Even so, watch for loss of stars, or sharpening haloes. Play with the sliders.
Recommendations:
While Topaz Photo AI is popular among nature photographers, I would suggest ON1โs NoNoise AI 2024 is the better choice for astrophotographers looking for a noise reduction plug-in.
I canโt dismiss Luminar Neo. I like it for some of its other special effect filters, such as Orton glows, Magic Light, Sky Enhancer AI, and Accent AI. I find it a useful plug-in for effects and finishing touches. However, I would not recommend Luminar for noise reduction.
SPECIALIZED PROGRAMS โ NOISE XTERMINATOR and GRAXPERT
No review of AI programs for astrophotography can leave out RC-Astroโs XTerminator plug-ins. Here I show Russell Cromanโs NoiseXTerminator which uses AI trained on star-filled astrophotos. I tested it as a filter plug-in for Photoshop.
Also becoming popular in the last year is the free stand-alone application GraXpert. Developed first to eliminate nasty gradients of tone and color across deep-sky images due to light pollution, GraXpert now also includes AI-based noise reduction. I tested it as a stand-alone application; it does not install as a plug-in, though like NoiseXTerminator, it can install as a process accessible from within the popular astrophoto program PixInsight.
As a stand-alone app, GraXpert can only import and work on TIFFs, JPGs, or FITS files, the latter format produced by dedicated astro cameras.
I show only deep-sky image examples, as thatโs the domain of these two programs.
Crab Nebula with NoiseXTerminator vs. ON1 and Topaz
Crab Nebula close-up โ with modified Canon R at ISO 800
First I show a comparison of the Crab Nebula test image with ACRโs standard non-AI noise reduction applied plus Photoshopโs old Reduce Noise filter. I compare this to the same image but with NoiseXTerminator also applied at 60% strength. Now compare this to versions with ON1 NoNoise and Topaz Photo AI.
NoiseXTerminator produced the smoothest result with no detrimental affect on the stars or nebulosity. ON1 is a good second place for noise reduction, with slightly sharper stars, which may or may not be desirable. Topaz produced subtle patchy artifacts and added tiny structures that may or may not be real.
NGC 1763 with NoiseXTerminator vs. ON1 and Topaz
NGC 1763 in LMC โ with modified Canon R at ISO 3200
This is a single-frame close-up of the second best nebula in the Large Magellanic Cloud (after the Tarantula), taken at ISO 3200 through a dual-narrowband filter. So it is noisy.
The left panel is again with ACR and Photoshopโs Reduce Noise. But applying NoiseXTerminator cleaned the image up a lot. ON1 looks almost as good. Topaz sharpened detail to the point of revealing pinprick faint stars that are just blurs in the other images. These may indeed be real!
Vela Supernova Remnant with Noise XTerminator and GraXpert
Vela SNR close-up โ with modified Canon R at ISO 3200
The same Vela SNR image I used earlier shows excellent noise reduction from NoiseXTerminator, with star colors and nebula structures left alone. GraXpert at 50% strength (the developers have suggested backing off the settings) did not produce as smooth a sky. Applying GraXpert at 100% strength did yield noise reduction on par with NoiseX, but produced a slightly softer overall image.
Crab Nebula with Noise XTerminator and GraXpert
Crab Nebula close-up โ with modified Canon R at ISO 800
Processing the Crab Nebula image shows much the same results. Though I think here even at 100% GraXpert isnโt producing as good a level of noise reduction as NoiseX, leaving some patchiness amid the nebula, and a mottled texturing to the background sky.
Summary Points:
For the best noise reduction on deep-sky images, especially telescopic close-ups, the dedicated programs NoiseXTerminator and GraXpert trained on such images can do a better job than general-purpose AI programs.
I find NoiseXTerminator the better of the two, but GraXpert is new and evolving.
Recommendations:
GraXpert has the great benefit of being free! But on Macs it runs very slowly, something the developers admit and seem resigned to, as their market is Windows users. My test images each took 2 to 2.5 minutes to process, some 5 to 10 times slower than any of the other programs. And it runs only as a stand-alone app, yet it cannot read Raw files from DSLRs or mirrorless cameras, unlike PureRAW. But if you are a deep-sky imager, try it, as its main purpose โ gradient removal โ might prove indispensable.
As I prefer to accomplish as much of my editing as possible within one program, I prefer NoiseXTerminator as it can be applied from within Photoshop, and as an editable smart filter. I use it on most of my deep-sky images. I highly recommend it and RC-Astroโs other plug-ins.
YOUR MILEAGE MAY VARY!
The nature of AI means that results with any program can vary from image to image. Thatโs why no one, me included, can claim that one program is โthe best!โ Best for what? And with what workflow?
As some programs, such as Topaz Photo AI, offer multiple AI models and settings for strength and sharpening, results on the same image can be quite different. In most of my testing I used either the programโs auto defaults or backed off from those defaults where I thought the effect was too strong and detrimental to the image.
This is all by way of saying, your mileage may vary! In fact, it certainly will.
So donโt take my word for it. Most programs (Luminar Neo is an exception) are available as free trial copies to test out on your astro-images and in your preferred workflow. Test for yourself.
But do pixel peep. Thatโs where youโll see the flaws. And the benefits. We are fortunate to have such a great arsenal of tools at our disposal. They will only get better as the AI models improve.
I hope my review โ as lengthy as it is! โ has helped you make an informed decision on what to buy.
It has been many years since we were treated to an aurora as widely seen as the show on May 10, 2024. Here’s my tale of the great display.
As the sky darkened around the world on May 10/11, 2024, sky watchers in both the northern and southern hemispheres were amazed to see the sky lit by the deep reds, greens and pinks of a massive display of aurora. For me, this was my first Kp8 to 9 show (to use one measure of aurora intensity) in more than 20 years, back in the film era!
Throughout the day, aurora chasers’ phones (mine included) had been beeping with alerts of the arrival of a major solar storm, with the usual indicators of auroral activity pinned to the top of the scale.
A NOAA satellite’s eye view of the ring of aurora May 10/11, showing it south of me in Alberta, and across the northern U.S. People in the southern U.S. saw it to their north.
As I show below, the graphic of the intensity of the band of aurora, the auroral oval, was lit up red and wide. This was a night we didn’t have to chase north to see the Northern Lights or aurora borealis โ they were coming south to meet us (as I show above).
The Kp Index was reading 9 on SpaceWeatherLiveThe auroral oval was lit up red in the Ovation mapThe 3-hour predictions called for red and magenta alerts!
Observers in the southern hemisphere had the normally elusive aurora australis move much farther north than usual, bringing the Southern Lights even to tropical latitudes in Australia, South America and Africa.
The cause was a massive sunspot group on the Sun which had let off several intense solar flares.
Sunspot group 3664 was so big it could be seen with the naked eye, using solar eclipse glasses. Photo courtesy NASA.
The flares had in turn blown off parts of the Sun’s atmosphere, the corona, that anyone who saw the total eclipse a month earlier had admired so much. But a month later, the corona was being blown our way, in a series of Coronal Mass Ejections (CMEs), to collide with Earth.
A movie of six CMEs blasting toward Earth, captured by the SOHO satellite. Courtesy NASA/ESA.
As it happened I was scheduled to give a community talk in the nearby town early in the evening of May 10, on the topic of The Amazing Sky! Watching the indicators, I could more or less promise the audience that we would indeed see an amazing sky later that evening as it got dark.
Post talk, I hurried home to get the cameras ready, choosing to forgo more hurried driving out to a scenic site in southern Alberta, for the convenience of shooting from my rural backyard. As the sky darkened, the clouds were lit purple, and curtains of aurora appeared in the clear patches.
Clouds and aurora in twilight with the 11mm TTArtisan full-frame fish-eye lens.A bright arc of aurora shining through the purple clouds, with the 7.5mm TTArtisan circular fish-eye lens.
Something big was going on! This was promising to be the best show of Northern Lights I had seen from home in a year. (Spring 2023 had three great shows at monthly intervals, followed by an aurora drought for many months. See The Great April Aurora.)
A selfie at the start of the great aurora show of May 10, 2024.
I shot with four cameras (a Canon EOS R, Ra, R5 and R6) โ two for time-lapses, one for real-time movies, and one for still images. I used the latter to take many multi-image panoramas, as they are often the best way to capture the wide extent of an aurora across the sky.
The arc of aurora in purple and white across the northern sky from home in Alberta at the start of the great display (about 11:30 p.m. MDT).
Early in the evening the arc of aurora wasn’t the usual green from oxygen, but shades of purple, pink, and even white, likely from sunlit nitrogen. The panorama above is looking north toward a strangely coloured arc of nitrogen (?) aurora.
Then after midnight a more normal curtain appeared suddenly, but toward the south, brightening and rising to engulf much of the southern sky and the sky overhead.
Looking south with the 15mm wide-angle lens.
It is at local midnight to 1 a.m. when substorms usually hit, as we are then looking straight down Earth’s magnetic tail, toward the rain of incoming aurora particles bombarding the Earth. During a substorm, the rain turns into a deluge โ the intensity of the incoming electrons increases, sparking a sudden brightening of the aurora, making it dance all the more rapidly.
This is a 300ยฐ panorama of my home sky now filled with colourful curtains.
As the aurora explodes in brightness it often swirls up to the zenith (or more correctly, the magnetic zenith) to form one of the sky’s greatest sights, a coronal outburst. Rays and beams converge overhead to form a tunnel effect. It is jaw-dropping.
I’ve seen this many times from northern sites such as Churchill and Yellowknife, where the aurora often dances straight up. And from my latitude of 51ยฐ N in western Canada, the aurora does often come down to us.
But this night, people at latitudes where, at best, the aurora might be seen just as a glow on the horizon, saw it dance overhead in a corona show to rival the solar eclipse, and that other corona we saw on April 8!
This is a panorama of a substorm outburst creating an overhead corona with rays converging to the magnetic zenith (south of the true zenith), and amid clouds. The rays show a rich mix of oxygen greens and reds, as well as nitrogen blues blending to create purples. Some greens and reds are mixing to make yellows.
Yes, the long exposures of aurora photos (even those taken with phone cameras) show the colours better than your eye can see them (insensitive as our eyes are to colour in dim light). But this night portions of the arcs and rays were bright enough that greens and pinks were easily visible to the naked eye.
This is a single 9-second exposure of the peak of a bright outburst at 1 a.m. MDT. It was with the Laowa 7.5mm circular fish-eye lens at f/2 on the Canon R5 at ISO 800. It is one frame from a time-lapse sequence. A brief outburst of a substorm created an overhead corona with bright rays converging to the magnetic zenith (south of the true zenith).The corona shows a mix of oxygen greens and reds, as well as nitrogen blues blending to create purples. Some greens and reds mix to make yellows.
At its peak the show was changing rapidly enough, I couldn’t get to all the cameras to aim and frame them, especially the movie camera. The brightest outburst at 1 a.m. lasted just a minute โ the time-lapse cameras caught it. The sequence below shows the view in 9-second exposures taken consecutively just 1 second apart.
This series shows a brief outburst of bright aurora at the magnetic zenith overhead. The time between these 7 consecutive 9-second exposures is only 1 second, so this bright outburst did not last long (little more than a minute). With the TTArtisan 7.5mm f/2 fish-eye lens on the Canon R5. Click or tap to enlarge to full screen.
Here’s another sequence of frames taken as part of a time-lapse sequence with the 11mm lens. It shows the change in the aurora over the 80 minutes or so that it was most active for me at my site.
The time between these 12 images is usually 8 minutes, though to include some interesting activity at a bright outburst, the interval is 5 minutes for three of the images around 1 a.m. Each is a 7- or 9-second exposure taken as part of a time-lapse sequence using the 11mm TTArtisan lens at f/2.8 on the Canon R at ISO 800 or 1600.
Shooting time-lapses with fish-eye lenses captures the show with a minimum of attention needed (except to adjust ISO or exposure times when the aurora brightens!). I could use the still camera (with the Laowa 15mm f/2 lens) to take individual shots, such as more selfies and home shots.
This is a single 6-second exposure with the Laowa 15mm lens at f/2 and Canon Ra at ISO 2000.This is a single 4-second exposure with the Laowa 15mm lens at f/2 and Canon Ra at ISO 1600. This is a single 8-second exposure with the Laowa 15mm lens at f/2 on the Canon Ra at ISO 800. Another camera taking a time-lapse is in the scene. I had four going this night.
As colourful as the aurora was at its best between midnight and 1:30 a.m., I think the most unique shots came after the show had subsided to appear just as faint rays across the north again, much as it had begun. To the eye it didn’t look like much, but even on the camera’s live screen I could see unusual colours.
I took more panoramas, to capture one of the most unusual auroral arcs I’ve even seen โ a blue and magenta aurora across the north, similar to how the night started.
This a stitch of 11 segments, each 13-second exposures, with the Laowa 15mm lens at f/2 on the Canon Ra camera at ISO 800, and turned to portrait orientation. Processed in Camera Raw and stitched with PTGui.
The colours may be from nitrogen glowing, which tends to light up in blues and purples, especially when illuminated by sunlight at high altitudes. At 2 to 2:30 a.m. the Sun might have been illuminating the aurora at a height of 150 to 400 km, and far to the north.
I’d seen blue-topped green auroras before (and there’s a green aurora off to the west at left here). But this was the first time I’d seen an all-blue aurora, no doubt a product of the intense energy flowing in the upper atmosphere this night. And the season and my latitude.
The panorama is a spherical projection spanning 360ยบ, and reaching to the zenith 90ยฐ high at centre. This a stitch of 20 segments, each 13-second exposures, with the Laowa 15mm lens at f/2 on the Canon Ra camera at ISO 800, and turned to portrait orientation. Processed in Camera Raw and stitched with PTGui.
The weirdest aurora was at 2:30 a.m., when in addition to the blue rays of nitrogen, an odd white and magenta patch appeared briefly to the south. What was that??
The lesson here? During a bright show do not go back to sleep when things seem to be dying down. Interesting phenomena can appear in the post-storm time, as we’ve learned with STEVE and other odd red arcs and green proton blobs that we aurora photographers have helped document.
I end with a finale music video, mostly made of the time-lapses I shot this night.
Enjoy!
Bring on more aurora shows as the Sun peaks in activity, perhaps this year. But the best shows often occur in the 2 or 3 years after solar max. So we have several more years to look forward to seeing the Lights dance in our skies.
Watch in full screen and in 4K if you can. For all the tech details click through to YouTube and check the description below the video.
I present a two-minute video set to music of the April 8, 2024 total solar eclipse.
In my previous blog Chasing the Cross Continental Eclipse I told the tale of my chase to see the total eclipse of the Sun. I ended up under mostly clear skies in the Eastern Townships of Quรฉbec, Canada, not Texas, my original destination.
Here I present the result of shooting with four cameras that afternoon, taking still images, time-lapses, and a 4K movie.
Be sure to watch in 4K!
The site worked out very well, as the lower Sun in eastern Canada lent itself to views framing the eclipse over a landscape below, in this case a very wavy lake. But I was lucky to have open water as other lakes in the area were still frozen.
My post-eclipse selfie at the Lac Brome site in Quebec for the April 8, 2024 total eclipse of the Sun.
As it was, a snow storm a few days earlier left lots of snow in the area to be included in my post-eclipse selfie.
This was only the third total solar eclipse I’ve seen from Canada, after February 26, 1979 from Manitoba, and August 1, 2008 from the air out of Cambridge Bay, Nunavut in the Canadian Arctic. The next total eclipse from Canada passes over my home in Alberta. But it is not until August 22, 2044!
I test nine programs for processing raw files for the demands of nightscape astrophotography.
Warning! This is a long and technical blog, but for those interested in picking the best software, I think youโll find it the most comprehensive test of programs for processing nightscapes. The review is illustrated with 50 high-resolution, downloadable images which will take a while to load. Patience!
As a background, in December 2017 I tested ten contenders vying to be alternatives to Adobeโs suite of software. You can find that earlier survey here on my blog. But 2017 was ages ago in the lifetime of software. How well do the latest versions of those programs compare now for astrophotography? And what new software choices do we have as we head into 2023?
To find out, I compared eight programs, pitting them against what I still consider the standard for image quality when developing raw files, Adobe Camera Raw (the Develop module in Adobe Lightroom is essentially identical). I tested them primarily on sample nightscape images described below.
I tested only programs that are offered for both MacOS and Windows, with identical or nearly identical features for both platforms. However, I tested the MacOS versions.
In addition to Adobe Camera Raw (represented by the Adobe Bridge icon), I tested, in alphabetical order, and from left to right in the icons above:
ACDSee Photo Studio
Affinity Photo 2 (from Serif)
Capture One 23
Darktable 4
DxO PhotoLab 6
Exposure X7
Luminar Neo (from SkyLum)
ON1 Photo RAW 2023
I tested all the programs strictly for the purpose of processing, or โdevelopingโ raw files, using nightscape images as the tests. I also looked at features for preparing and exporting a large batch of images to assemble into time-lapse movies, though the actual movie creation usually requires specialized software.
NOTE: I did not test the programs with telescope images of nebulas or galaxies. The reason โ most deep-sky astrophotographers never use a raw developer anyway. Instead, the orthodox workflow is to stack and align undeveloped raw files with specialized โcalibrationโ software such as DeepSkyStacker or PixInsight that outputs 16-bit or 32-bit TIFFs, bypassing any chance to work with the raw files.
TL;DR Conclusions
Hereโs a summary of my recommendations, with the evidence for my conclusions presented at length (!) in the sections that follow:
Whatโs Best for Still Image Nightscapes?
Adobe Camera Raw (or its equivalent in Adobe Lightroom) still produces superb results, lacking only the latest in AI noise reduction, sharpening and special effects. Though, as Iโve discovered, AI processing can ruin astrophotos if not applied carefully.
The Adobe alternatives that provided the best raw image quality in my test nightscapes were Capture One and DxO PhotoLab.
ACDSee Photo Studio, Exposure X7,and Luminar Neo produced good results, but all had flaws.
ON1 Photo RAW had its flaws as well, but can serve as a single-program replacement for both Lightroom and Photoshop.
Affinity Photo works well as a Photoshop replacement, and at a low one-time cost. But it is a poor choice for developing raw images.
If you are adamant about avoiding subscription software, then a combination of DxO PhotoLab and Affinity Photo can work well, providing great image quality, and serving to replace both Lightroom and Photoshop.
I cannot recommend Darktable, despite its zero price. I struggled to use its complex and overly technical interface, only to get poor results. It also kept crashing, despite me using the new ARM version on my M1 MacBook Pro. It was worth what I paid for it.
At the end of my blog, I explain the reasons why I did not include other programs in the test, to answer the inevitable โBut what about โฆ!?โ questions.
Whatโs Best for Basic Time-Lapses?
For simple time-lapse processing, where the same settings can be applied to all the images in a sequence, all the programs except Affinity Photo, can copy and paste settings from one key image to all the others in a set, then export them out as JPGs for movie assembly.
However, for the best image quality and speed, I feel the best choices are:
Adobe, either Lightroom or the combination of Camera Raw/Bridge
Capture One 23
DxO PhotoLab 6
While ON1 Photo RAW can assemble movies directly from developed raw files, I found Capture One or DxO PhotoLab can do a better job processing the raw files. And ON1โs time-lapse function is limited, so in my opinion it is not a major selling point of ON1 for any serious time-lapse work.
Luminar Neo was so slow at Copy & Paste and Batch Export it was essentially unusable.
Whatโs Best for Advanced Time-Lapses?
None of the non-Adobe programs will work with the third-party software LRTimelapse (www.lrtimelapse.com). It is an essential tool for advanced time-lapse processing.
While ON1 offers time-lapse movie assembly, it cannot do what LRTimelapse does โ gradually shift processing settings over a sequence based on keyframes to accommodate changing lighting, and to micro-adjust exposure levels based on actual image brightness to smooth out the bane of time-lapse shooters โ image flickering.
LRTimelapse works only with Lightroom or ACR/Bridge. If serious and professional time-lapse shooting is your goal, none of the Adobe contenders will do the job. Period. Subscribe to Adobe software. And buy LRTimelapse.
Avoiding Adobe?
My testing demonstrated to me that for nightscape photography, Adobe software remains a prime choice, for its image quality and ease of use. However, the reasons to go with any program other than Adobe are:
For equal or even better image quality, or for features not offered by Adobe.
But mostly to avoid Adobeโs subscription model of monthly or annual payments.
Capture One pricing as of early 2023, in Canadian funds.
All the non-Adobe alternatives can be purchased as a โperpetual licenseโ for a one-time fee, though often with significant annual upgrade costs for each yearโs major new release. However, you neednโt purchase the upgrade; your old version will continue to run. Below, I provide purchase prices in U.S. funds, but most companies have frequent sales and discount offers.
While all of Adobeโs competitors will proclaim one-time pricing, several also offer their software via annual subscriptions, with additional perks and bonuses, such as file syncing to mobile apps, or better long-term or package pricing, to entice you to subscribe.
Keep in mind that whatever program you use, its catalog and/or sidecar files where your raw image settings are stored will always be proprietary to that program. ON1 and Affinity also each save files in their own proprietary format. Switch to any other software in the future and your edits will likely not be readable by that new software.
Raw Editing vs. Layer-Based Editing
As I mentioned, I tested all the programs strictly for their ability to process, or โdevelop,โ raw image files for nightscapes. (Raw files are likened to being digital negatives that we โdevelop.โ)
For some nightscape still images, raw developing might be all thatโs needed, especially as software companies add more advanced โAIโ (artificial intelligence) technology to their raw developers for precise selection, masking, and special effects.
In the case of time-lapse sequences made of hundreds of raw frames, raw developing is the only processing that is practical. What we need for time-lapses is to:
Develop a single key raw file to look great, then โฆ
Copy all its settings to the hundreds of other raw files in the time-lapse set, then โฆ
Export that folder of raw images to โintermediate JPGsโ for assembly into a movie, usually with a specialized assembly program.
The programs that offer layer-based editing: Adobe Photoshop, ON1 Photo RAW, and Serif Affinity Photo
However, for most still-image astrophotography, including nightscapes, we often stack and/or blend multiple images to create the final scene, for several reasons:
To stack multiple images with a Mean or Median stack mode to smooth noise.
To layer dozens of images with a Lighten blend mode to create star trails.
To layer and blend images via masking to combine the different exposures often needed to record the ground and sky each at their best.
Or often as not, a combination of all of the above!
All those methods require a layer-based program. Adobe Photoshop is the most popular choice.
Of the programs tested here, only two also offer the ability to layer multiple images for stacks, blends and composites. They are:
Affinity Photo 2
ON1 Photo RAW 2023
I did not test these two programs to compare their image layering and masking abilities vs. Photoshop, as important as those functions might be.
Fans of Skylumโs Luminar Neo will point out that it also supports image layers. In theory. In the version I tested (v1.6.2) bugs made it impossible to load files into layers properly โ the layer stack became confused and failed to display the stackโs contents. I could not tell what it was stacking! Skylum is notorious for its buggy releases.
Those determined not to use Adobe software should be aware that, apart from Affinity Photo and ON1 Photo RAW, all the other programs tested here are not replacements for Adobe Photoshop, nor are they advertised as such. They are just raw developers, and so can serve only to replace Adobe Lightroom or Adobe Camera Raw/Adobe Bridge.
The Challenge
This is the main image I threw at all nine programs, a single 2-minute exposure taken at Lake Louise, Alberta in October 2022. The lens was the Canon RF15-35mm at f/2.8 on a Canon R5 camera at ISO 800.
The original raw image
Above is the raw image as it came out of camera, with the default Adobe Color camera profile applied, but no other adjustments. The length of exposure on a static tripod meant the stars trailed. The image has:
A sky that needs color correcting and contrast enhancement.
Dark shadows in the foreground and distance that need recovery.
Bright foreground areas that need suppressing, where lights from the Chateau Lake Louise hotel illuminate the mountainsides and water.
Lens flares and lights from night hikers that need retouching out.
It is an iconic scene, but when shot at night, itโs a challenging one to process.
The untracked image developed in Adobe Camera Raw
Above is the image after development in Adobe Camera Raw (ACR), using sliders under its Basic, Optics, Detail, Curve, Color Mixer, and Calibration tabs, and applying the Adobe Landscape camera profile. Plus I added retouching, and local adjustments with ACRโs masks to affect just the sky and parts of the ground individually. This is the result I think looks best, and is the look I tried to get all other programs to match or beat. You might prefer a different look or style.
The developed tracked image
In addition, I tried all programs on another two-minute exposure of the scene (shown above) but taken on a star tracker to produce untrailed, pinpoint stars, but a blurred ground. It served to test how well each programโs noise reduction and sharpening dealt with stars.
The final layered and blended image in Adobe Photoshop
I shot that tracked version to blend with the untracked version to produce the very final image above, created from the Camera Raw edits. That blending of sky and ground images (with each component a stack of several images) was done in Photoshop. However, Affinity Photo or ON1 Photo RAW could have done the required layering and masking. I show a version done with Affinity at the end of the blog.
The Competitors
In a statement I read some time ago, DxO stated that Adobe products enjoy a 90% share of the image processing market, leaving all the competitors to battle over the remaining 10%. Iโm not sure how accurate that is today, especially as many photographers will use more than one program.
However, I think it is fair to say Adobeโs offerings are the programs all competitors are out to beat.
NOTE: Click/tap on any of the images to bring them up full screen as high-res JPGs so you can inspect them more closely.
The Established Standard
Adobe Camera Raw (included with Photoshop, Adobe Bridge and Lightroom)
Cost: $10 a month, or $120 a year by subscription for 20 Gb of cloud storage (all prices in U.S. $)
Adobe Camera Raw (ACR) is the raw development utility that comes with Photoshop and Adobe Bridge, Adobeโs image browsing application. Camera Raw is equivalent to the Develop module in Lightroom, Adobeโs cataloguing and asset management software. Camera Raw and Lightroom have identical processing functions and can produce identical results, but I tested ACR. I use it in conjunction with Adobe Bridge as an image browser. Bridge can then send multiple developed images into Photoshop as layers for stacking. All programs are included in Adobeโs Photo subscription plan.
The Contenders (in Alphabetical Order)
Here are the eight programs I tested, comparing them to Adobe Camera Raw. All but Skylumโs Luminar Neo offer free trial copies.
ACDSee Photo Studio
Cost: $100 to $150, depending on version. $50 on up for annual major upgrades. By subscription from $70 a year.
I tested Photo Studio for Mac v9. Windows users have a choice of Photo Studio Professional or Photo Studio Ultimate. All three versions offer a suite of raw development tools, in addition to cataloging functions. However, the Ultimate version (Windows only) also offers layer-based editing, making it similar to Photoshop. ACDSee assured me that Photo Studio for Mac resembles the Windows Professional version, at least for basic raw editing and image management. However, Photo Studio Professional for Windows also has HDR and Panorama merging, which the Mac version does not.
Affinity Photo 2
Cost: $70. Upgrades are free except for rare whole-number updates (in seven years thereโs been only one of those!). No subscription plan is offered.
Apart from the free Darktable, this is the lowest-cost raw developer on offer here. But Affinityโs strength is as a layer-based editor to compete with Photoshop. As such, Affinity Photo has some impressive features, such as the unique ability to calibrate and align deep-sky images, its stack modes (great for star trails and noise smoothing) which only Photoshop also has, and its non-destructive adjustment layers, filters and masks. Affinity Photo is the most Photoshop-like of all the programs here. However, it alone of the group lacks any image browser or cataloging function, so this is not a Lightroom replacement.
Capture One 23 Pro
Cost: $299. 33% off (about $200) for annual major upgrades. By subscription for $180 a year.
Capture One started life as a program for tethered capture shooting in fashion studios. It has evolved into a very powerful raw developer and image management program. While Capture One advertises that it now offers โlayers,โ these are only for applying local adjustments to masked areas of a single underlying image. While they work well, you cannot layer different images. So Capture One cannot be used like Photoshop, to stack and composite images. It is a Lightroom replacement only, but a very good one. However, it is the most costly to buy, upgrade each year, or subscribe to, which appears to be the sales model Capture One is moving toward, following Adobe.
In contrast to Capture One, you cannot argue with Darktableโs price! For a free, open-source program, Darktable is surprisingly full-featured, while being fairly well supported and updated. As with most free cross-platform programs, Darktable uses an unconventional and complex user interface lacking any menus. It has two main modules: Lighttable for browsing images, and Darkroom for editing images. Map, Slideshow, Print and Tethering modules clearly signal this program is intended to be a free version of Lightroom. The price you pay, however, is in learning to use its complex interface.
DxO PhotoLab 6 ELITE
Cost: $219. $99 for annual major upgrades. No subscription plan is offered.
DxO PhotoLab is similar to Capture One in being a very complete and feature-rich raw developer with good image management functions and a well-designed interface. While it has an image browser for culling, keywording and rating images, PhotoLab does not create a catalog as such, so this isnโt a full Lightroom replacement. But it is a superb raw developer, with very good image quality and noise reduction. While PhotoLab is also available in a $140 ESSENTIAL edition, it lacks the DeepPrime noise reduction and ClearView Plus haze reduction, both useful features for astrophotos.
Exposure X7
Cost: $129. $89 for annual major upgrades. No subscription plan is offered.
Formerly known as Alien Skin Exposure, from the makers of the once-popular utilities Blow Up and Eye Candy, Exposure X7 is a surprisingly powerful raw editor (considering you might not have heard of it!), with all the expected adjustment options, plus a few unique ones such as Bokeh for purposely blurring backgrounds. It enjoys annual major updates, so is kept up to date, though is a little behind the times in lacking any AI-based effects or masking, or even automatic edge detection. Like Capture One, Exposure offers adjustment layers for ease of applying local edits.
Luminar Neo
Cost: $149. $39 to $59 for individual Extensions. $179 for Extensions pack. By subscription for $149 a year which includes Neo and all Extensions. Frequent discounts and changing bundles make the pricing confusing and unpredictable.
By contrast to Exposure X7, Luminar Neo from Skylum is all about AI. Indeed, its predecessor was called Luminar AI. Introduced in 2022, Neo supplanted Luminar AI, whose image catalog could not be read by Neo, much to the consternation of users. Luminar AI is now gone. All of Skylumโs effort now goes into Neo. It offers the expected raw editing adjustments, along with many powerful one-click AI effects and tools, some offered as extra-cost extensions in a controversial ร la carte sales philosophy. Neoโs cataloging ability is basic and unsuitable for image management.
ON1 Photo RAW 2023
Cost: $99. $60 for annual major upgrades. $70 for individual plug-ins, each with paid annual updates. By subscription for $90 a year which includes all plug-ins and updates.
Of all the contenders tested, this is the only program that can truly replace both Lightroom and Photoshop, in that ON1 Photo RAW has cataloging, raw developing, and image layering and masking abilities. In recent years ON1 has introduced AI functions for selection, noise reduction, and sharpening. Some of these are also available as individual plug-ins for Lightroom and Photoshop at an additional cost. While the main program and plug-ins can be purchased as perpetual licences, the total cost makes an annual subscription the cheapest way to get and maintain the full ON1 suite. Like Capture One, they are moving customers to be subscribers.
Feature Focus
I have assumed a workflow that starts with raw image files, not JPGs, for high-quality results. And I have assumed the goal of making that raw image look as good as possible at the raw stage, an important step in the workflow, as it is the only time we have access to the full dynamic range of the 14-bit raw data that comes from the camera.
I judged each program based on several features I consider key to great nightscapes and time-lapses:
Browser/Cataloging Functions โBecause we often deal with lots of images from an astrophoto shoot, the program should allow us to sort, rate, and cull images before proceeding with developing the best of the set for later stacking, and to easily compare the results.
Lens Corrections โDoes the program apply automatic lens corrections for distortion and vignetting? How extensive is its lens database? Or are manual adjustments required?
Noise Reduction โWe shoot at high ISOs, so good noise reduction is essential for removing digital noise without sacrificing details such as pixel-level stars, or adding AI artifacts.
Shadow Recovery โWhile good highlight recovery can be important (and a prime reason for shooting and processing raw images), in nightscapes good shadow recovery is even more crucial. The starlit ground is dark, but rich in detail. We want to recover that shadow detail, without affecting other tonal ranges or introducing noise.
Local Adjustments and Masking โGood masking tools allow us to do more at the raw stage while we have access to the full range of image data. But how precise can the masks be? How easy is it to apply different settings to the ground and sky, the most common need for local adjustments with nightscapes.
Overall Finished Image Quality โTools such as Dehaze and Clarity can work wonders at boosting contrast in the sky. Good color adjustments from HSL sliders can help fine-tune the overall color balance. How good did the final image look? โ an admittedly subjective judgement.
Copy & Paste Settings โA program should not only develop one image well, but also then be able to transfer all of that key imageโs settings to several other images taken for noise stacking, or to what could be hundreds of images shot for a time-lapse movie or star trail scene.
Batch Export โFor stacking images for star trails, or for creating panoramas in advanced stitching programs such as PTGui, or when assembling time-lapse movies, the program should allow a โbatch exportโ of selected images to TIFFs or JPGs for use elsewhere.
Advanced Features โDoes the program support panorama stitching and HDR (High Dynamic Range) merging of selected developed raw files? If so, what type of file does it create?
Summary Comparison Table
โข = Feature is present; ticks the boxes!
โ = Feature is missing
Partial = Feature only partially implemented (e.g. Only has distortion correction but not vignetting correction, or has limited cataloging functions)
I judged other features on an admittedly subjective scale of Poor, Fair, Good, or Excellent, based on my overall impressions of the reliability, options offered, quality, and/or speed of operation.
Feature-by-Feature Details โ 1. Browsing and Cataloging
Here, feature by feature, are what I feel are the differences among the programs, comparing them using the key factors I listed above.
All programs, but one, offer a Browse or Library module presenting thumbnails of all the images in a folder or on a drive. (For Adobe Camera Raw that module is Adobe Bridge, included with the Creative Cloud Photo subscription.) From the Browse/Library module you can sort, rate and cull images.
The Catalog screens from six of the programs tested
Luminar Neoโs Catalog function (as of early 2023) allows only flagging images as favorites. It is very crude.
The other programs have more full-featured image management, allowing star rating, color label rating, pick/reject flags, keywording, grouping into collections or projects, and searching.
Capture One and ON1 Photo RAW provide the option of importing images into formal catalogs, just as Adobe Lightroom requires. However, unlike Lightroom, both programs can also work with images just by pointing them to a folder, without any formal import process. Capture One calls this a โsession.โ Adobe Bridge works that way โ it doesnโt produce a catalog.
While not having to import images first is convenient, having a formal catalog allows managing a library even when the original images are off-line on a disconnected hard drive, or for syncing to a mobile app. If thatโs important, then consider Capture One, ON1 Photo RAW, or Adobe Lightroom. They each have mobile apps.
Adobe Lightroom (but not Bridge) is also able to connect directly to what it calls โPublish Servicesโ โ Flickr, PhotoShelter, and SmugMug for example, using plug-ins offered by those services. I use that feature almost daily. ACDSee offers that feature only in its Windows versions of Photo Studio. As best I could tell, all other programs lacked anything equivalent.
SerifAffinity Photo is the lone exception lacking any form of image browser or asset management. Itโs hard to fathom why in late 2022, with their major update to Version 2 of their software suite, Serif did not introduce a digital asset management program to link their otherwise excellent Photo, Designer and Publisher programs. This is a serious limitation of Serifโs Affinity creative suite, which is clearly aimed at competing one-on-one with Adobe Photoshop, Illustrator and InDesign, yet Serif has no equivalent of Adobe Bridge for asset management.
WINNERS: Capture One and ON1 Photo RAW, for the most flexibility in informal browsing vs. formal cataloguing. Adobe Lightroom for its Publish Services.
LOSER: Affinity Photo for lacking any image management or catalog.
The wide-angle lenses we typically use in nightscape and time-lapse imaging suffer from vignetting and lens distortions. Ideally, software should automatically detect the camera and lens used and apply accurate corrections based on its equipment database.
The Lens Corrections panels from all nine programs.
Of the nine programs tested, only four โ Adobe Camera Raw, Darktable, DxO PhotoLab, and ON1 Photo Raw โ automatically applied both distortion and vignetting corrections for the Canon RF15-35mm lens I used for the test images. DxO is particularly good at applying corrections, drawing upon the companyโs vast repository of camera and lens data. If your local copy of PhotoLab is missing a camera-lens combination, what it calls a โmodule,โ DxO allows you to download it or request it.
Capture One and Exposure X7 both detected the lens used and applied distortion correction, but did nothing to adjust vignetting. I had to apply vignetting correction, a more important adjustment, manually by eye.
ACDSee and Luminar have no Auto Lens Corrections at all; distortion and vignetting both have to be dialed in manually.
Affinity Photo lacked any automatic correction data for the Canon RF15-35mm lens in question, despite the lens being introduced in 2019. I selected the similar Canon EF16-35mm lens instead, as I show above circled in blue. Affinity gets marks off for having an outdated and incomplete lens database.
WINNERS: Adobe, Darktable, DxO PhotoLab, and ON1 Photo RAW, for full Auto Lens Corrections.
LOSERS: ACDSee and Luminar, for lacking Auto Lens Corrections.
Feature-by-Feature Details โ 3. Noise Reduction and Sharpening
Absolutely essential to astrophotography is effective noise reduction, of both grainy โluminanceโ noise, as well as colorful speckles and splotches from โchrominanceโ noise. Programs should smooth noise without eliminating stars, removing star colors, or adding odd structures and artifacts.
Conversely, programs should offer a controllable level of sharpening, without introducing dark halos around stars, a sure sign of over-zealous sharpening.
Closeups of the tracked image comparing noise reduction and star image quality in all 9 programs. Tap or click to download a high-res version for closer inspection to see the pixel-level differences.
I tested noise reduction using the tracked version of my test images, as the pinpoint stars from the 45-megapixel Canon R5 will reveal any star elimination or discoloration.
Adobe Camera Rawโs aging noise reduction routine stood up very well against the new AI competitors. It smoothed noise acceptably, while retaining star colors and Milky Way structures. But turn it up too high, as might be needed for very high ISO shots, and it begins to blur or wipe out stars. AI noise reduction promises to solve this.
AI-Based Noise Reduction:
DxO PhotoLabโs Prime and DeepPrime AI-based options can also do a good job. But โฆ I find DeepPrime (shown above) and the newer DeepPrimeXD (shown below) can introduce wormy looking artifacts to starfields. The older Prime method might be a better choice. However, the annoyance with DxO PhotoLab is that it is not possible to preview any of its Prime noise reduction results full-screen, only in a tiny preview window, making the best settings a bit of a guess, requiring exporting the image to see the actual results.
ON1 Photo RAWโs NoNoise AI can also do a good job, but has to be backed off a lot from the automatic settings its AI technology applies. Even so, I found it still left large-scale color blotches, a pixel-level mosaic pattern, and worst of all, dark halos around stars, despite me applying no sharpening at all to the image. ON1 continues to over-sharpen under the hood. I criticized it for star halos in my 2017 survey โ the 2023 version behaves better, but still leaves stars looking ugly.
The other AI program, Luminar Neo with its Noiseless AI extension (an extra-cost option) did a poor job, adding strange artifacts to the background sky and colored halos around stars.
Comparing DxO’s three Prime noise reduction options on the untracked image. DeepPrimeXD is sharper!Comparing DxO’s three Prime noise reduction methods on the tracked image. DeepPrimeXD is riddled with artifacts.
So beware of AI. As I show above with DxO, because they are not trained on starfields, AI routines can introduce unwanted effects and false structures. What works wonders on high-ISO wildlife or wedding shots can ruin astrophotos.
For a more complete test of AI programs, such as Topaz DeNoise AI and Noise XTerminator, made specifically for noise reduction, see my review from November 2022, Testing Noise Reduction Programs for Astrophotography.
Non AI-Based Noise Reduction:
Capture One smoothed noise very well, but tended to bloat stars and soften fine detail with its Single Pixel control turned up even to one pixel, as here.
Affinity Photo nicely smoothed noise, but also removed star colors, yet added colored rims to some stars, perhaps from poor de-Bayering. Serif Labโs raw engine still has its flaws.
ACDSee Photo Studio also added loads of unacceptable halos to stars, and could not reduce noise well without smoothing details.
Darktable has very good noise reduction, including a panel specifically for Astrophoto Denoise. Great! Pity its routines seemed to wipe out star colors and fine structures in the Milky Way.
Exposure X7 smoothed noise well, but also wiped out details and structures, and its sharpening adds dark halos to stars.
That said, it might be possible to eke out better results from all these programs with more careful settings. Backing off sharpening or noise reduction can avoid some of the unwanted side effects I saw, but leave more noise.
Adobe Camera Raw does eliminate most random hot or dead pixels “under the hood.” However, I wish it had an adjustable filter for removing any that still remain (usually from thermal noise) and that can plague the shadows of nightscapes. Single-pixel filters are offered by Capture One, Darktable, DxO, and Exposure X7. Though turning them up too high can ruin image detail.
WINNERS: Adobe and DxO PhotoLab (if the latter is used cautiously)
LOSERS: ACDSee, Affinity, Darktable, Exposure X7, and Luminar Neo for unacceptable loss of detail and star colors, while adding in false structures (Neo)
Feature-by-Feature Details โ 4. Shadow Recovery
While all programs have exposure and contrast adjustments, the key to making a Milky Way nightscape look good is being able to boost the shadows in the dark starlit ground, while preventing the sky or other areas of the image from becoming overly bright or washed out.
Comparing Shadow Recovery in two programs (Camera Raw – top – and DxO PhotoLab – middle) that worked quite well, with Darktable (bottom) that did not.
In the three examples above I have applied only white balance and exposure correction, then โliftedโ the Shadows. I added some contrast adjustment to Darktable, to help improve it, and Smart Lighting to the DxO image, which was needed here.
Here are my findings, roughly in order of decreasing image quality, but with Adobe first as the one to match or beat.
Adobe Camera Raw has a very good Shadows slider that truly affects just the dark tonal areas and with a slight touch (turning it up to 100 doesnโt wipe out the image). Some other programsโ Shadows adjustments are too aggressive, affect too wide a range of tones, or just add a grey wash over the image, requiring further tweaks to restore contrast.
Capture One did an excellent job on Shadow recovery under its High Dynamic Range set of sliders. The dark landscape brightened without becoming flat or grey. This is a primary contributor to its excellent image quality.
DxO PhotoLabโs Shadows slider affects a wider tonal range than ACR or Capture One, also brightening mid-tones, though it has a Midtones slider to separately adjust those. On its own, the Shadows slider didnโt work as well as in ACR or Capture One. But DxOโs superb feature is its โSmart Lighting,โ which can work wonders on a scene with one click. Another unique adjustment is โClearView Plus,โ a form of Dehaze which can snap up contrast, often too aggressively, but it can be backed off in intensity. Those two adjustments alone might be reason enough to use PhotoLab.
ON1 Photo RAWโs Shadows slider affected too wide a range of tonal values, brightening the entire scene and making it look flat. This can be overcome with some tweaks to the Contrast, Blacks and Midtones sliders. It takes more work to make a scene look good.
ACDSeeโs Fill Light and Shadows sliders were also much too broad. But its unique LightEQ panel has options for โStandard” and โAdvancedโ settings which each provide an equalizer interface for making more selective tonal adjustments. It worked well, though the image looked too harsh and contrasty, despite me adding no contrast adjustments, the opposite flaw of other programs.
Luminar Neoโs Shadows slider under its DevelopRAW panel was also broad, washing out contrast, requiring a liberal application of its SuperContrast slider to return the image to a better look. But the final result looked fine.
Exposure X7โs Shadows slider also lowered overall contrast, requiring boosting Contrast and Blacks to return the image to a pleasing tonal balance.
Affinity Photoโs Shadows slider did a far better job in its new v2 (released in late 2022) than in the original Affinity Photo, which was frankly awful. Even so, I found Affinity Photo 2 still tended to produce flat results, hard to compensate for from within the Develop Persona, as its options are so limited.
Darktableโs Shadows slider (which has several sub-sliders) produced a flat result. Despite the numerous variations of other contrast and level adjustments scattered over various panels, I could not get a pleasing result. It will take a true Darktable fan and expert to exact a good image from its bewildering options, if itโs even possible.
WINNERS: Capture One and DxO PhotoLab, plus Adobe still works well
LOSERS: Affinity Photo and Darktable
Feature-by-Feature Details โ 5. Local Adjustments and Masking
This is the area where programs have made major improvements in the five years since my last survey of raw developers. Thus I devote a major section to the feature.
With accurate and easy masking it is now easier to apply adjustments to just selected areas of a raw image. We can finish off a raw file to perhaps be publication ready, without having to use a layer-based program like Photoshop to perform those same types of local adjustments. Adobe Camera RAW, Luminar Neo, and ON1 Photo Raw are leaders in this type of advanced AI masking. But other programs have good non-AI methods of masking โ and making โ local adjustments.
Adobe Camera Raw (and Adobe Lightroom) now has far better masking than in older versions that used the awkward method of applying multiple โpins.โ Masks now occupy separate layers, and AI masks can be created in one-click for the sky (and ground by inverting the Sky mask) and for key subjects in the image. Other non-AI masks can be created with brushes (with an Auto Mask option for edge detection) and gradient overlays, and with the option of luminance and color range masks. The AI-created Sky masks proved the most accurate compared to other programsโ AI selections, though they can intrude into the ground at times. But the sky masks do include the stars. In all, Camera Raw (or Lightroom) has the most powerful masking tools of the group, though they can be tricky to master.
ACDSee Photo Studio allows up to eight different brushed-on mask areas, each with its own adjustments, in addition to gradient masks. There is no edge detection as such, though the brushes can be limited to selecting areas of similar brightness and color. The โMagicโ brush option didnโt help in selecting just the sky and stars. Local adjustments are possible to only Exposure, Saturation, Fill Light, Contrast, and Clarity. So no local color adjustments are possible. In all, local adjustments are limited.
Affinity Photo has, in its Develop Persona, what it calls Overlays, where for each Overlay, or layer, you can brush on separate sets of adjustments using all the sliders in the Develop Persona. Oddly, there is no option for decreasing the opacity of a brush, only its size and feathering. While there is an Edge Aware option, it did a poor job on the test image detecting the boundary between land and sky, despite the edge being sharply defined. So local adjustments require a lot of manual brushing and erasing to get an accurate mask. The red mask Overlay, useful at times, has to be turned on and off manually. Other programs (ACR and Capture One) have the option of the colored overlay appearing automatically just when you are brushing.
Capture One offers adjustment layers for each mask required. The only โsmartโ brush is the Magic Brush which affects areas across the entire image with similar luminosity. There isnโt any edge detection option as such, so creating masks for the sky and ground is still largely a manual process requiring careful brushing. Separate layers can be added for healing and retouching. While Capture Oneโs local adjustments can work well, they require a lot more manual work than do programs equipped with AI-driven selection tools.
DxO PhotoLab allows multiple local adjustments, with the option of an Auto Mask brush that nicely detects edges, though the mask overlay itself (as shown above on the sky) doesnโt accurately show the area being affected. Strange. Masks can also be added with what are called Control Points to affect just areas of similar luminance within a wide circle, often requiring multiple Control Points to create an adjustment across a large region. Masks can also be created with adjustable brushes. Each masked area is then adjusted using a set of equalizer-like mini-controls, rather than in the main panels. In all, itโs a quirky interface, but it can work quite well once you get used to it.
Exposure X7 offers adjustment layers with options to add a gradient, or to draw or brush on an area to make a selection. There is no edge detection, only a color range mask option, so creating a sky or ground mask can require lots of hand painting. I found the preview sluggish, making it a bit of a trial-and-error exercise to make fine adjustments. However, the full range of tone and color adjustments can be applied to any local mask, a plus compared to ACDSee for example.
Luminar was first out with AI masks to automatically select the sky, and various landscape elements it detects. In all it does a good job, making it easy to add local adjustments. There are also gradient tools and normal brushes, but oddly, considering the amount of AI Luminar relies on, there is no edge detection (at least, as of early 2023). So brushing to create a mask requires a lot of finicky painting and erasing to refine the mask edge. The strong point is that masks can be added to any of Luminarโs many filters and adjustment panels, allowing for lots of options for tweaking the appearance of selected areas, such as adding special effects like glows to the sky or landscape. However, most of those filters and effects are added to the image after it is developed, and not to the original raw file.
ON1’s AI Sky mask does not include the stars.
ON1 Photo RAW has always offered good local adjustments, with each occupying its own layer. Photo RAW 2023 added its new โSuper Selectโ AI tools to compete with Adobe. But they are problematic. The select Sky AI masking fails to include stars, leaving a sky mask filled with black holes, requiring lots of hand painting to eliminate. You might as well have created the mask by hand to begin with. Plus in the test image, selecting โMountainโ to create a ground mask just locked up the program, requiring a Force Quit to exit it. However, ON1โs conventional masks and adjustments work well, with a wide choice of brush options. The Perfect Brush detects areas of similar color, not edges per se.
WINNERS: Adobe and Luminar for accurate AI masks
LOSER: Darktableโ it has no Local Adjustments at all
I provide each of the finished images for the untracked star trail example below, under Program-by-Program Results. But hereโs a summary, in what I admit is a subjective call. One program would excel in one area, but be deficient in another. But who produced the best looking end result?
Overall, I think Capture One came closest to matching or exceeding Adobe Camera Raw for image quality. Its main drawback is the difficulty in creating precise local adjustment masks.
DxO PhotoLab also produced a fine result, but still looking a little flat compared to ACR and Capture One. But it does have good AI noise reduction.
In the middle of the ranking are the group of ACDSee Photo Studio, Exposure X7, and ON1 Photo RAW. Their results look acceptable, but closer examination reveals the flaws such as haloed stars and loss of fine detail. So they rank from Fair to Good, depending on how much you pixel peep!
Luminar Neo did a good job, though achieving those results required going beyond what its DevelopRAW panel can do, to apply Neoโs other filters and effects. So in Neoโs case, I did more to the image than what was possible with just raw edits. But with Luminar, the distinction between raw developer and layer-based editor is fuzzy indeed. It operates quite differently than other programs tested here, perhaps refreshingly so.
For example, with the more conventionally structured workflow of Affinity Photo, I could have exacted better results from it had I taken the developed raw image into its Photo Persona to apply more adjustments farther down the workflow. The same might be said of ON1 Photo RAW.
But the point of this review was to test how well programs could do just at the raw-image stage. Due to the unique way it operates, Iโll admit Luminar Neo did get the advantage in this raw developer test. Though it failed on several key points.
WINNERS: Adobe and Capture One, with DxO a respectable second
Getting one image looking great is just the first step. Even when shooting nightscape stills we often take several images to stack later.
As such, we want to be able to process just one image, then copy and paste its settings to all the others in one fell swoop. And then we need to be able to inspect those images in thumbnails to be sure they all look good, as some might need individual tweaking.
While itโs a useful feature for images destined for a still-image composite, Copy & Paste Settings is an absolutely essential feature for processing a set for a time-lapse movie or a star trail stack.
The Copy and Paste Settings panels from the 8 programs that offer this feature.
I tested the programs on the set of 360 time-lapse frames of the Perseid meteor shower used next for the Batch Export test.
Adobe Bridge makes it easy to copy and paste Camera Raw settings to identically process all the files in a folder. Lightroom has a similar function. Adobe also has adaptive masks, where a sky mask created for one image will adapt to all others, even if the framing or composition changes, as it would in a motion-control time-lapse sequence or panorama set. Applying settings to several hundred images is fairly quick, though Bridge can be slow at rendering the resulting thumbnails.
ON1 Photo RAW can also copy and paste AI masks adaptively, so a Sky mask created for one image will adapt to match another image, even if the framing is different. However, applying all the settings to a large number of images and rendering the new previews proved achingly slow. And itโs a pity it doesnโt create a better sky mask to begin with.
Capture One has a single Copy and Apply Adjustments command where you develop one image, select it plus all the other undeveloped images in the set to sync settings from the processed image to all the others. But the adjustment layers and their masks copy identically; there is no adaptive masking because there are no AI-generated masks. However, applying new settings to hundreds of images and rendering their thumbnails is very fast, better than other programs.
DxO PhotoLabโs Control Point masks and local adjustments also copy identically. Copying adjustments from one image to the rest in the set of 360 test images was also very fast.
ACDSee Photo Studio and Exposure X7 also allow copying and pasting all or selected settings, including local adjustment masks. ACDSee was slow, but Exposure X7 was quite quick to apply settings to a large batch of images, such as the 360 test images.
Darktableโs function is under the History Stack panel where you can copy and paste all or selected settings, but all are global โ there are no local adjustments or masks.
Luminar Neo allows only copying and pasting of all settings, not a selected set. When testing it on the set of 360 time-lapse frames, Neo proved unworkably slow, taking as much as an hour to apply settings and render the resulting thumbnails in its Catalog view, during which time my M1 MacBook Pro warned the application was running out of memory, taking up 110 Gb! I had to Force Quit it.
Affinity Photo is capable of editing only one image at a time. There is no easy or obvious way to copy the Develop Persona settings from one raw image, open another, then paste in those settings. You can only save Presets for each Develop Persona panel, making transferring settings from one image to even just one other image a tedious process.
Affinity Photo with several raw images stacked and identically processed with the method below.
Affinity Workaround
But โฆ there is a non-obvious and unintuitive method in Affinity which works for stacking and processing a few raw files for a blend:
Process one raw image and then click Develop so it moves into the Photo Persona, as a โRAW Layer (Embedded),” a new feature in Affinity Photo 2.
Find the other raw image files (they wonโt have any settings applied) and simply drag them onto the Photo Persona screen.
Use the Move tool to align the resulting new layers with the original image.
Select all the image layers (but only the first will have any settings applied) and hit the Develop Persona button.
Then hit the Develop button โ this will apply the settings from the first image to all the others in the layer stack. Itโs the best Affinity can do for a โcopy and pasteโ function.
Change the blend mode or add masks to each layer to create a composite or star trail stack.
Each layer can be re-opened in the Develop Persona if needed to adjust its settings.
Itโs all a bit of a kludge, but it does work.
WINNERS: Capture One for blazing speed; Adobe and ON1 for adaptive masks
LOSER: Affinity Photo, for lacking this feature entirely, except for a method that is not at all obvious and limited in its use.
Feature-by-Feature Details โ 8. Batch Export
Once you develop a folder of raw images with โCopy & Paste,โ you now have to export them with all those settings โbaked intoโ the exported files.
This step creates an intermediate set of TIFFs or JPGs to either assemble into a movie with programs such as TimeLapse DeFlicker, or to stack into a star trail composite using software such as StarStaX.
The Batch Export panels from all 9 programs.
To test the Batch Export function, I used each program to export the same set of 360 developed raw files taken with a 20-megapixel Canon R6, shot for a meteor shower time-lapse, exporting them into full-resolution, low-compression JPGs.
While all programs can do the task, some are much better than others.
Adobe Bridge has a configurable Export panel (though it can be buggy at times), as does Lightroom. Its speed is good, but is beaten by several of the competitors.
Even Affinity Photo can do a batch export, done through its โNew Batch Job” function. As with its other image selection operations, Affinity depends on your operating systemโs Open dialog box to pick images. Exporting worked well, though without being able to develop a batch of raw files, Iโm not sure why you would have cause to use this batch function to export them. I had to test it with undeveloped raws. Oddly, Affinityโs exported JPGs (at 5496 x 3664 pixels) were slightly larger than the size of the original raws (which were 5472 x 3648 pixels). No other program did this.
Most programs allow saving combinations of Export settings as frequently used presets. An exception is Exposure X7 where separate presets have to be saved and loaded for each option in its Export panel, awkward. And Luminar Neoโs batch export is basic, with no option for saving Export presets at all.
In the export of the 360 test images, each program took:
Adobe Bridge 15 minutes (after 3 attempts to get it to actually work!)
ACDSee Photo Studio 33 minutes
Affinity Photo 2 32 minutes
Capture One 23 6 minutes
Darktable 4 16 minutes
DxO PhotoLab 6 8 minutes
Exposure X7 5 minutes 30 seconds
Luminar Neo 8.5 hours (!)
ON1 Photo RAW 2023 1.4 hours
This was on my M1 Max MacBook Pro. Your mileage will vary! The clear winners in the export race were Exposure X7, Capture One, and DxO. ON1 was way behind the pack. Luminar was impossibly slow. It is not a program for working with lots of images.
ON1โs Time-Lapse Function
Unique among these programs, ON1 Photo RAW provides a Time-Lapse function that allows directly exporting developed raw files to a final movie, without the need to export an intermediate JPG set. That sounds like a great time saver. Only Adobe After Effects can do the same.
However โฆ ON1โs options are limited: up to a maximum DCI 4K size, in H264 or Apple ProRes codecs, and with a choice of just three frame rates: 24, 25, or 30 frames per second. A dedicated assembly program such as TimeLapse DeFlicker can do a much better job, and faster, with more options such as frame blending, and up to 8K movie sizes.
And oddly, ON1โs Time-Lapse panel provides no option for where to save the movie or what to name it โ it defaults to saving the movie to the original folder with the images, and with the name of one of the images. I had to search for it to locate it.
WINNERS: Exposure X7 and Capture One for sheer speed
LOSER: Luminar Neo for being unusably slow
Feature-by-Feature Details โ 9. Advanced Features
Here Iโve noted what programs offer what features, but I tested only the panorama stitching function. For a panorama test I used a set of seven images shot with the Canon R5 and RF15-35mm lens at Peyto Lake, Banff.
The Panorama options from 4 programs. ON1 (lower left) failed to stitch 2 of the 7 segments).
Adobe Camera Raw (and Lightroom) offers HDR Merge and Panorama stitching plus, uniquely, the ability to merge multi-exposure HDR panoramas. But it has no Focus Stack option (thatโs in Photoshop). For panoramas, ACR offers a choice of projection geometries, and the very excellent Boundary Warp function for filling in blank areas, as well as content-aware Fill Edges. The result is a raw DNG file.
Capture One has HDR Merge and Panorama stitching, but no Focus Stack option. Like ACR, Capture Oneโs panorama mode offers a choice of projection geometries and results in a raw DNG file for further editing at the raw level. It worked well on the test set, though lacks anything equivalent to ACR’s content-aware Fill Edges and Boundary Warp options.
ON1 Photo RAW offers HDR Merge, Focus Stack, and Panorama stitching of raw files. Using the same seven images that ACR and Capture One succeeded with, ON1 failed to stitch two of the segments, leaving a partial pano. It does offer a limited choice of projection methods and, like ACR, has the option to warp the image to fill blank areas. It creates a raw DNG file.
Affinity Photo also offers HDR Merge, Focus Stack, and Panorama stitching, all from raw files. However, the panorama function is quite basic, with no options for projection geometry or content-aware fill. But it did a good job blending all segments of the test set seamlessly. The result is a raw file that can be further processed in the Develop Persona.
ACDSee Photo Studio for Mac lacks any HDR, Focus Stack, or Panorama stitching. Those functions are available in the Windows versions (Pro and Ultimate), but I did not test them.
Luminar Neo offers HDR Merge and Focus Stack through two extra-cost extensions. As of this writing it does not offer Panorama stitching, but more extensions (yet to be identified!) will be released in 2023.
Darktable offers just HDR Merge, but no Focus Stack or Panorama functions.
DxO PhotoLab 6 lacks any HDR, Focus Stack or Panorama functions. Ditto for Exposure X7. Those are serious deficiencies, as we have a need for all those functions when processing nightscapes. You would have to develop the raw files in DxO or Exposure, then export TIFFs to merge or stitch them using another program such as Affinity Photo.
WINNERS: Adobe and Capture One
LOSER: DxO for missing key functions expected in a premium โAdobe killerโ
Program-by-Program Summary
I could end the review here, but I feel itโs important to present the evidence, in the form of the final images, as best I could process them with each of the programs. I rate their overall image quality and performance on a subjective scale of Poor / Fair / Good / Excellent, with additional remarks about the Pros and Cons of each program, as I see them.
Adobe Camera Raw (also applies to Adobe Lightroom)
IMAGE QUALITY: Excellent
PROS: ACR has excellent selective shadow recovery and good noise reduction which, while not up to the level of new AI methods, doesnโt introduce any weird AI artifacts. Its panels and sliders are fairly easy to use, with a clean user interface. Its new AI masking and local adjustments are superb, though take some practice to master.
CONS: It is available only by monthly or annual subscription, and lacks the more advanced AI noise reduction, sharpening, and one-click special effects of some competitors. Using the Adobe suite requires moving between different Adobe programs to perform all functions. Adobe Bridge, a central program in my workflow, tends to be neglected by Adobe, and suffers from bugs and deficiencies that go uncorrected.
ACDSee Photo Studio (for Mac)
IMAGE QUALITY: Fair
PROS: Photo Studio in its various versions offers good image management functions, making it suitable as a non-subscription Lightroom alternative. It offers an advanced array of tonal and color adjustments in an easy-to-use interface.
CONS: It produced badly haloed stars and had poor noise reduction. Its local adjustments are limited and lag behind the competition with no AI functions. It has no panorama stitching or HDR merging functions in the Mac version โ the Windows versions get much more love and attention from ACDSee.
Affinity Photo 2
IMAGE QUALITY: Fair (for its Develop Persona) / Good to Excellent (as a Photoshop replacement)
PROS: Affinity Photo is certainly the best alternative to Photoshop for anyone looking to avoid Adobe. It is an excellent layer-based program (far better than GIMP) with unique features for astrophotographers such as stacking and gradient removal. With v2, it is now possible to transfer a raw file from the Develop Persona to the Photo Persona non-destructively, allowing re-opening the raw file for re-editing, similar to Adobeโs Camera Raw Smart Objects.
CONS: Affinity Photoโs Develop Persona for raw files is basic, with limited adjustments and producing average results at best. Transferring settings from one raw file to others is difficult, if not impossible. Affinity Photo is designed for editing single images only.
Capture One 23
IMAGE QUALITY: Excellent
PROS: Capture One has excellent shadow recovery and color adjustment controls. Local adjustments are easy to add and edit, though lack edge detection and AI selection. It has excellent cataloging functions, and overall superb image quality. Itโs a good Lightroom alternative.
CONS: Itโs costly to purchase, and more expensive than Adobeโs Creative Cloud to subscribe to. It can easily soften stars if not careful. It lacks AI masking, and overall the program tends to lag behind competitors by a few years for advanced features โ Capture One added panorama stitching only a couple of versions back. I found the program also tended to litter my drive with Capture One folders.
Darktable
IMAGE QUALITY: Poor
PROS: Itโs free! And it offers many adjustments and intricate options not found elsewhere that the technically minded will enjoy experimenting with.
CONS: Darktableโs community of developers has added a bewildering array of panels in a confusing interface, making Darktable not for beginners nor the feint of heart. I struggled with it, all for poor results. Just finding the Export function was a challenge. Darktable is a program designed by programmers for use by other programmers who love to play with image data, and who care little for a user interface friendly to โthe rest of us!โ
DxO PhotoLab 6
IMAGE QUALITY: Excellent
PROS: Along with Capture One, I found DxO PhotoLab capable of producing a good-looking image, the equal of or perhaps better than Camera Raw, partly because of DxOโs ClearView and Smart Lighting options. It has lots of downloadable camera and lens modules for automatic lens corrections. Its noise reduction was excellent, though its DeepPrime and DeepPrimeXD options can add AI artifacts.
CONS: There are no adjustment layers or masks as such. Local adjustments are done through DxOโs quirky Control Point interface which isnโt as visually intuitive nor as precise as masks and layers. As of PhotoLab 6, DxO has yet to offer panorama or HDR merging, lagging far behind the competition.
Exposure X7
IMAGE QUALITY: Fair
PROS: Exposure has a full set of tonal and color adjustments, and essential image management functions. It has good local adjustment layers, though with no AI or smart brushes to automatically detect edges. It produced acceptable final results, though still looking a little flat.
CONS: Exposure lacks any panorama stitching or HDR merging functions. Its noise reduction can wipe out stars and image details, and its sharpening adds dark halos to stars. It often crashed during my testing, by simply quitting unexpectedly. Annoying.
Luminar Neo
IMAGE QUALITY: Good to Excellent
PROS: Luminar has a clean, fresh interface with many powerful AI-driven functions and effects unique to Luminar and that are easy to apply. The final result looks fine. Its AI masks work quite well. Neo also works as a plug-in for Photoshop or Lightroom.
CONS: Luminar is expensive to purchase outright with all the Extensions, with a subscription the most economical method of acquiring, and maintaining, the full package. Its Noiseless AI didnโt handle starfields well. Neo lacks a useable cataloging function, and the version tested had numerous serious bugs. It is best for editing just single images.
ON1 Photo RAW 2023
IMAGE QUALITY: Good
PROS: ON1 Photo RAW is the only program of the set that can: catalog images, develop raw files, and then layer and stack images, performing all that Lightroom and Photoshop can do. It can serve as a one-program solution, and has excellent Effects and NoNoise AI, also available as plug-ins for Adobe software. It offers layer-based editing as well.
CONS: ON1 consistently produces dark halos around stars from over-sharpening in its raw engine. These cannot be eliminated. Its AI selection routines are flawed. Its AI noise reduction can leave artifacts if applied too aggressively, which is the default setting. Opening images from the Browse module as layers in the Edit module can be slow. It offers no stack modes (present in Photoshop and Affinity) for easy noise smoothing or star trail stacking, and the alternative โ changing layer Blend modes โ has to be done one at a time for each layer, a tedious process for a large image stack.
Why Didnโt I Test โฆ?
โฆ [Insert your favorite program here!] No doubt itโs one you consider badly neglected by all the worldโs photographers!
But โฆ as I stated at the outset, I tested only programs offered for both MacOS and Windows. I tested the MacOS versions โ and for nightscapes, which are more demanding than normal daytime scenes.
Icons for the programs not tested. How many can you identify? Hint: They are in alphabetical order.
I did not test:
Adobe Photoshop Elements โEffectively Photoshop โLite,โ Elements is available for $99 as a one-time purchase with a perpetual license, for both MacOS and Windows. Optional annual updates cost about $80. While it offers image and adjustment layers, and can open .PSD files, Elements cannot do much with 16-bit images, and has limited functions for developing raw files, in its version of Camera Raw โLite.โ And its Lightroom-like Organizer module does not not have any Copy & Paste Settings or batch export functions, making it unsuitable for batch editing or time-lapse production.
Like Appleโs Photos and other free photo apps, I donโt consider Elements to be a serious option for nightscape and time-lapse work. A Creative Cloud Photo subscription doesnโt cost much more per year, yet gets you far, far more in Adobeโs professional-level software.
Corel PaintShop โ As with ACDSeeโs product suite, Corelโs PaintShop is available in Pro and Pro Ultimate versions, both updated for 2023, and each with extensive raw and layer-based editing features. But they are only for Windows. If you are a PC user, PaintShop is certainly worth testing out. Their neglected MacOS program (also available for Windows and Linux) is the raw developer AfterShot Pro 3 (currently at v3.7.0.446). It is labeled as being from 2017, and last received a minor bug fix update in January 2021. I included it in my 2017 survey, but could not this year as it refused to recognize the CR3 raw files from my Canon R5 and R6 cameras.
Darkroom and Acorn are two Mac-only apps wth just basic features. There are no doubt numerous other similar Windows-only apps that I am not familiar with.
GIMP โ Being free, it has its loyal fans. But it is not a raw developer, so it is not tested here. It is favorite of some astrophotographers as a no-cost substitute for Adobe Photoshop or Affinity Photo. Itโs available for MacOS and Windows.
Iridient Developer โ Its anachronistic, text-only website looks like it comes from 1995, giving the impression that this raw developer should be free, open-source software. It isnโt; it costs $99. It is a basic raw developer but only for MacOS. It is updated frequently, and a trial copy is available.
Pixelmator Pro โ While it is a very capable and well-supported program with some excellent features, it too is available only for MacOS. Like Affinity Photo, it seems to be primarily for editing individual raw images, and lacks any image management functions, notably Copy & Paste Settings.
PixInsight โ This specialized astrophoto program is designed for deep-sky image processing and bringing out the most subtle structures in faint nebulas and galaxies. For those it works wonders. But it is not suitable for nightscapes. Examples Iโve seen from PI fans who have used it for nightscapes, including images Iโve sent them for their expert processing, have not impressed me.
RawTherapee โ As of early January 2023 when I completed my testing, the latest version of this free open-source program, v5.9, was available only for Windows and Linux. The MacOS version was still back at v5.8 from February 2020, a version that was unable to open the Canon CR3 raw files I was using in my tests. While the CR3 format has been out for several years, RawTherapee was still not supporting it, a hazard of open-source software dependent on the priorities of volunteer programmers who mostly use Windows. Like Darktable, RawTherapee is an incredibly complex program to use, with programmers adding every possible panel, slider and checkbox they could think of.ย [UPDATE MARCH 2023: RawTherapee 5.9 for MacOS is now available and opens Canon .CR3 files. Mac users might certainly want to try it. And Windows users, too!]
Topaz Studio โ While Topaz Labs has been busy introducing some fine AI specialty programs, such as DeNoise AI, their main photo editor, Topaz Studio, has been neglected for years and, as of late 2022, was not even listed as a product for sale. Itโs gone.
What About? โ To prevent the number of programs tested from growing even larger, I did not include a few other little-known and seldom-used programs such as Cyberlink PhotoDirector and Picktorial, though Iโm sure they have their fans.
I also did not test any camera manufacturer programs, such as Canonโs Digital Photo Professional, Nikonโs CaptureNX, or Sonyโs ImagingEdge. They will open raw images only from their own cameras. Few photographers use them unless forced to, perhaps to open new raw files not yet supported by Adobe, DxO, et al, or to access files created by special camera functions such as Pixel Shift or Raw Burst Mode.
Recommendations
Having used Adobe software for decades, Iโm used to its workings and the look it provides images. Iโve yet to see any of the competitors produce results so much better that they warrant me switching programs. At best, the competitors produce results as good as Adobe, at least for nightscape astrophotos, though with some offering unique and attractive features.
For example, the AI noise reduction routines in DxO PhotoLab and ON1 Photo RAW can outperform Adobe Camera Raw and Lightroom. Adobe needs to update its raw editing software with more advanced noise reduction and sharpening. Even so, the AI routines in the competitors are prone to creating odd artifacts, so have to be applied carefully to astrophotos.
A possible workflow: DxO PhotoLab or Capture One into Affinity Photo
As I recommended in 2017, for those who refuse to use Adobe โ or any software by subscription โ a possible combination for the best astrophoto image quality might be DxO PhotoLab 6 for raw developing and basic time-lapse processing, paired with Affinity Photo 2 for stacking and compositing still images, from finished TIFF files exported out of DxO then opened and layered with Affinity.
An example of images developed in Capture One and then layered and masked in Affinity Photo.
The pairing of Capture One with Affinity could work just as well, though is more costly. And anyone who hates software by subscription in principle might want to avoid Capture One as they are pushing customers toward buying only by subscription, as is ON1.
For a single-program solution, Iโd recommend ON1 Photo RAW more highly, if only it produced better star image quality. Its raw engine continues to over-sharpen, and its AI masking functions are flawed, though will likely improve. I routinely use ON1โs Effects plug-in from Photoshop, as it has some excellent โfinishing-touchโ filters such as Dynamic Contrast. I find ON1โs NoNoise AI plug-in also very useful.
The same applies to Luminar Neo. While I canโt see using it as a principle processing program, it works very well as a Photoshop plug-in for adding special effects, some with its powerful and innovative AI routines.
Finally โ Download Trials and Test!
But donโt take my word for all of this. Please test for yourself!
With the exception of Luminar Neo, all the programs I tested (and others I didnโt, but you might be interested in) are available as free trial copies. Try them out on your images and workflow. You might find you like one program much better than any of the others or what you are using now.
Often, having more than one program is useful, if only for use as a plug-in from within Lightroom or Photoshop. Some plug-ins made for Photoshop also work from within Affinity Photo, though it is hit-and-miss what plug-ins will actually work. (In my testing, plug-ins from DxO/Nik Collection, Exposure X7, ON1, RC-Astro, and Topaz all work; ones from Skylum/Luminar install but fail to run.)
LRTimelapse working on the meteor shower time-lapse frames.
While I was impressed with Capture One and DxO PhotoLab, for me the need to use the program LRTimelapse (shown above) for processing about 80 percent of all the time-lapse sequences I shoot means the question is settled. LRTimelapse works only with Adobe software, and the combination works great and improves wth every update of LRTimelapse.
Even for still images, the ease of working within Adobeโs ecosystem to sort, develop, layer, stack, and catalog images makes me reluctant to migrate to a mix of programs from different companies, especially when the cost of upgrading many of those programs is not much less than, or even more costly, than an Adobe Photo plan subscription.
However โฆ if itโs just a good raw developer you are after for astro work, without paying for a subscription, try Capture One 2023 or DxO PhotoLab 6. Try Affinity Photo if you want a good Photoshop replacement.
Clear skies! And thanks for reading this!
โ Alan, January 2023 / ยฉ 2023 Alan Dyer / AmazingSky.com
In mid-October 2022 I enjoyed a rare run of five clear and mild nights in the Rocky Mountains for shooting nightscapes of the stars. Hereโs a portfolio โฆ and a behind-the-scenes look at its making.
Getting two perfectly clear nights in a row is unusual in the mountains. Being treated to five is a rare treat. Indeed, had I started my shooting run earlier in the week I could have enjoyed even more of the string of cloudless nights in October, though under a full Moon. But five was wonderful, allowing me to capture some of the scenes that had been on my shot list for the last few years.
Here is a portfolio of the results, from five marvelous nights in Banff and Jasper National Parks, in Alberta, Canada.
For the photographers, I also provide some behind-the-scenes looks at the planning and shooting techniques, and of my processing steps.
Night One โ Peyto Lake, Banff National Park
Peyto Lake, named for pioneer settler and trail guide Bill Peyto who had a cabin by the lakeshore, is one of several iconic mountain lakes in Banff. Every tour bus heading along the Icefields Parkway between Banff and Jasper stops here. By day is it packed. By night I had the newly constructed viewpoint all to myself.
The stars of Ursa Major, the Great Bear, over the waters of Peyto Lake, Banff, in deep twilight. This is a stack of 6 x 30-second exposures for the ground and a single untracked 30-second exposure for the sky, all at f/2.8 with the Canon RF 15-35mm lens at 15mm, and Canon R5 at ISO 800.
I shot the classic view north in deep twilight, with the stars of Ursa Major and the Big Dipper low over the lake, as they are in autumn. A show of Northern Lights would have been ideal, but I was happy to settle for just the stars.
This is a blend of two panoramas: the first of the sky taken at or just before moonrise with the camera on a star tracker to keep the stars pinpoint, and the second taken for the ground about 20 minutes later with the tracker off, when the Moon was up high enough to light the peaks. Both pans were with the Canon RF15-35mm lens at 15mm and f/2.8, and Canon R5 at ISO 1600, with the sky pan being 7 segments for 1 minute each, and the untracked ground panorama being the same 7 segments for 2 minutes each.
The night was perfect, not just for the clarity of the sky but also the timing. The Moon was just past full, so was rising in late evening, leaving a window of time between the end of twilight and moonrise when the sky would be dark enough to capture the Milky Way. Then shortly after, the Moon would come up, lighting the peaks with golden moonlight โ alpenglow, but from the Moon not Sun.
The above is blend of two panoramas, each of seven segments, the first for the sky taken when the sky was dark, using a star tracker to keep the stars pinpoints. The second for the ground I shot a few minutes later at moonrise with no tracking, to keep the ground sharp. I show below how I blended the two elements.
The Photographer’s Ephemeris
TPE 3D
To plan such shots I use the apps The Photographerโs Ephemeris (TPE) and its companion app TPE 3D. The screen shot above at left shows the scene in map view for the night in question, with the Big Dipper indicated north over the lake and the line of dots for the Milky Way showing it to the southwest over Peyto Glacier. Tap or click on the images for full-screen versions.
Switch to TPE 3D and its view at right above simulates the scene youโll actually see, with the Milky Way over the mountain skyline just as it really appeared. The app even faithfully replicates the lighting on the peaks from the rising Moon. It is an amazing planning tool.
This is a blend of 5 x 20-second exposures stacked for the ground to smooth noise, and a single 20-second exposure for the sky, all with the Canon RF15-35mm lens at f/2.8 and Canon R5 at ISO 1600. All were untracked camera-on-tripod shots.
On the drive back from Peyto Lake to Saskatchewan River Crossing I stopped at another iconic spot, the roadside viewpoint for Mt. Cephren at Waterfowl Lakes. By this time, the Moon was well up and fully illuminating the peak and the sky, but still leaving the foreground dark. The sky is blue as it is by day because it is lit by moonlight, which is just sunlight reflecting off a perfectly neutral grey rock, the Moon!
This is from a set of untracked camera-on-tripod shots using short 30-second exposures.
Night Two โ Pyramid Lake, Jasper National Park
By the next night I was up in Jasper, a destination I had been trying to revisit for some time. But poor weather prospects and forest fire smoke had kept me away in recent years.
The days and nights I was there coincided with the first weekend of the annual Jasper Dark Sky Festival. I attended one of the events, the very enjoyable Aurora Chaserโs Retreat, with talks and presentations by some well-known chasers of the Northern Lights. Attendees had come from around North America.
This is a blend of: a stack of 4 x 1-minute tracked exposures for the sky at ISO 1600 plus a stack of 7 x 2-minute untracked exposures at ISO 800 for the ground, plus an additional single 1-minute tracked exposure for the reflected stars and the foreground water. All were with the Canon RF15-35mm lens at 15mm and f/2.8 and Canon R5.
On my first night in Jasper I headed up to Pyramid Lake, a favorite local spot for stargazing and night sky photography, particularly from the little island connected to the โmainlandโ by a wooden boardwalk. Lots of people were there quietly enjoying the night. I shared one campfire spot with several other photographers also shooting the Milky Way over the calm lake before moonrise.
This is a blend of: a stack of 4 x 1-minute tracked exposures for the sky at ISO 1600 plus a stack of 6 x 3-minute untracked exposures at ISO 800 for the ground, all with the Canon RF15-35mm lens at 20mm and f/2.8 and Canon R5. The tracker was the Star Adventurer Mini.
A little later I moved to the north end of Pyramid Island for the view of the Big Dipper over Pyramid Mountain, now fully lit by the rising waning Moon, and with some aspens still in their autumn colours. A bright meteor added to the scene.
Night Three โ Athabasca River Viewpoint, Jasper National Park
For my second night in Jasper, I ventured back down the Icefields Parkway to the โGoats and Glaciersโ viewpoint overlooking the Athabasca River and the peaks of the Continental Divide.
This is a blend of three 3-section panoramas: the first taken with a Star Adventurer Mini for 3 x 2-minute tracked exposures for the sky at ISO 800; the second immediately afterward with the tracker off for 3 x 3-minutes at ISO 800 for the ground; and the third taken about an hour later as the Moon rose, lighting the peaks with warm light, for 3 x 2.5-minutes at ISO 1600. All with the Canon RF15-35mm lens at f/2.8 and 15mm and Canon R5,
As I did at Peyto Lake, I shot a panorama (this one in three sections) for the sky before moonrise with a tracker. I then immediately shot another three-section panorama, now untracked, for the ground while it was still lit just by starlight under a dark sky. I then waited an hour for moonrise and shot a third panorama to add in the golden alpenglow on the peaks. So this is a time-blend, bending reality a bit. See my comments below!
Night Four โ Edith Lake, Jasper National Park
With a long drive back to Banff ahead of me the next day, for my last night in Jasper I stayed close to town for shots from the popular Edith Lake, just up the road from the posh Jasper Park Lodge. Unlike at Pyramid Lake, I had the lakeshore to myself.
This is a panorama of four segments, each 30 seconds untracked with the Canon RF15-35mm lens at 15mm and f/2.8 and Canon R5 at ISO 1000.
This would be a fabulous place to catch the Northern Lights, but none were out this night. Instead, I was content to shoot scenes of the northern stars over the calm lake and Pyramid Mountain.
This is a blend of a single tracked 2-minute exposure for the sky and water with the reflected stars, with a single untracked 4-minute exposure for the rest of the ground, both at f/2.8 with the Canon RF15-35mm lens at 17mm and Canon R5 at ISO 800.
This is a blend of a single tracked 2-minute exposure for the sky and water with the reflected stars, with a stack of two untracked 3-minute exposure for the rest of the ground, both at f/2.8 with the Canon RF15-35mm lens at 17mm and Canon R5 at ISO 1600. I shot this October 16, 2022.
The Moon was now coming up late, so the shots above are both in darkness with only starlight providing the illumination. Well, and also some annoying light pollution from town utility sites off the highway. Jasper is a Dark Sky Preserve, but a lot of the townโs street and utility lighting remains unshielded.
Night Five โ Lake Louise, Banff National Park
On my last night I was at Lake Louise, as the placement of the Milky Way would be perfect.
This is a blend of two sets of exposures: – a stack of two untracked 2-minute exposures for the ground at ISO 800 – a stack of four tracked 1-minute exposures for the sky at ISO 1600 All with the Canon RF15-35mm lens at f/2.8 and 20mm and Canon R5, and with the camera and tripod not moving between image sets.
Thereโs no more famous view than this one, with Victoria Glacier at the end of the blue-green glacial lake. Again, by day the site is thronged with people and the parking lot full by early morning.
By night, there were just a handful of other photographers on the lakeshore, and the parking lot was nearly empty. I could park right by the walkway up to the lake.
The Photographer’s Ephemeris
TPE 3D
Again, TPE and TPE 3D told me when the Milky Way would be well-positioned over the lake and glacier, so I could complete the untracked ground shots first, to be ready to shoot the tracked sky segments by the time the Milky Way had turned into place over the glacier.
This is a blend of three vertical panoramas: the first is a set of three untracked 2-minute exposures for the ground at ISO 800 with the camera moved up by 15ยฐ from segment to segment; the second shot immediately afterward is made of 7 x 1-minute tracked exposures at ISO 1600 for the sky, also moved 15ยฐ vertically from segment to segment; elements of a third 3-section panorama taken about 90 minutes earlier during “blue hour” were blended in at a low level to provide better lighting on the distant peaks. All with the Canon RF15-35mm lens at f/2.8 and 20mm and Canon R5.
This image is also a panorama but a vertical one, made primarily of three untracked segments for the ground and seven tracked segments for the sky, panning up from the horizon to past the zenith overhead, taking in most of the summer and autumn Milky Way from Serpens up to Cassiopeia.
Nightscape Gear
As readers always want to know what gear I used, I shot all images on all nights with the 45-megapixel Canon R5 camera and Canon RF15-35mm lens, with exposures of typically 1 to 3 minutes each at ISOs of 800 to 1600. I had other cameras and lenses with me but never used them.
Star Adventurer Mini tracker with Alyn Wallace V-Plate and AcraTech Panorama Head
For a tracker for such images, I used the Sky-Watcher Star Adventurer Mini, a compact and lightweight unit that is easy to pack and carry to shooting sites. See my review of it here at AstroGearToday.
I use the Mini with a V-Plate designed by nightscape photographer Alyn Wallace and sold by Move-Shoot-Move. It is an essential aid to taking tracked panoramas, as it allows me to turn the camera horizontally manually from one pan segment to the next while the camera is tracking the stars. Itโs easy to switch the tracker on (for the sky) and off (for the ground). The Mini tracks quite accurately and reliably. Turn it on and you can be sure it is tracking.
For those who are interested, hereโs a look at how I processed and assembled the images, using the Peyto Lake panorama as an example. This is not a thorough tutorial, but shows the main steps involved. Tap or click on an image to download a full-size version.
I first develop all the raw files (seven here) in Adobe Camera Raw, applying identical settings to make them look best for what they are going to contribute to the final blend, in this case, for the tracked sky with pinpoint stars and the Milky Way.
Camera Raw (as does Adobeโs Lightroom) has an excellent Merge to Panorama function which usually works very well on such scenes. This shows the stitched sky panorama, created with one click.
I develop and stitch the untracked ground segments to look their best for revealing details in the landscape, overexposing the sky in the process. Stars are also trailed, from the long exposures needed for the dark ground. No matter โ these will be masked out.
This shows the stack of images now in Adobe Photoshop, but here revealing just the layer for the sky panorama and its associated adjustment layers to further tweak color and contrast. I often add noise reduction as a non-destructive โsmart filterโ applied to the โsmart objectโ image layer. See my review of noise reduction programs here.
This shows just the ground panorama layer, again with some adjustment and retouching layers dedicated to this portion of the image.
The sky has to be masked out of the ground panorama, to reveal the sky below. The Select Sky command in Photoshop usually works well, or I just use the Quick Selection tool and then Select and Mask to refine the edge. That method can be more accurate.
Aligning the two panoramas requires manually nudging the untracked ground, up in this case, to hide the blurred and dark horizon from the tracked sky panorama. Yes, we move the earth! The sky usually also requires some re-touching to clone out blurred horizon bits sticking up. Dealing with trees can be a bit messy!
The result is the scene above with both panorama layers and the masks turned on. While this now looks almost complete, weโre not done yet.
Local adjustments like Dodge and Burn (using a neutral grey layer with a Soft Light blend mode) and some luminosity masks tweak the brightness of portions of the scene for subtle improvements, to emphasize some areas while darkening others. Itโs what film photographers did in the darkroom by waving physical dodging and burning tools under the enlarger.
I add finishing touches with some effect plug-ins: Radiant Photo added some pop to the ground, while Luminar Neo added a soft โOrton glowโ effect to the sky and slightly to the ground.
All the adjustments, filters, and effects are non-destructive so they can be re-adjusted later, when upon further inspection with fresh eyes I realize something needs work.
Was It Photoshopped?
I hope my look behind the curtains was of interest. While these types of nightscapes taken with a tracker, and especially multi-segment panoramas, do produce dramatic images, they do require a lot of processing at the computer.
Was it โphotoshopped?โ Yes. Was it faked? No. The sky really was there over the scene you see in the image. However, the long exposures of the camera do reveal more details than the eye alone can see at night โ that is the essence of astrophotography.
My one concession to warping reality is in the time-blending โ the merging of panoramas taken 30 minutes to an hour apart. Iโll admit that does push my limits for preferring to record real scenes, and not fabricate them (i.e. โphotoshopโ them in common parlance).
But at this shoot on these marvelous nights, making use of the perfectly timed moonrises was hard to resist!
In a detailed technical blog I compare six AI-based noise reduction programs for the demands of astrophotography. Some can work wonders. Others can ruin your image.
Over the last two years we have seen a spate of specialized programs introduced for removing digital noise from photos. The new generation of programs use artificial intelligence (AI), aka machine learning, trained on thousands of images to better distinguish unwanted noise from desirable image content.
At least thatโs the promise โ and for noisy but normal daytime images they do work very well.
But in astrophotography our main subjects โ stars โ can look a lot like specks of pixel-level noise. How well can each program reduce noise without eliminating stars or wanted details, or introducing odd artifacts, making images worse.
To find out, I tested six of the new AI-based programs on real-world โ or rather โreal-skyโ โ astrophotos. Does one program stand out from the rest for astrophotography?
NOTE: All the images are full-resolution JPGs you can tap or click on to download for detailed inspection. But that does make the blog page slow to load initially. Patience!
TL;DR SUMMARY
The new AI-trained noise reduction programs can indeed eliminate noise better than older non-AI programs, while leaving fine details untouched or even sharpening them.
Of the group tested, the winner for use on just star-filled images is a specialized program for astrophotography, NoiseXTerminator from RC-Astro.
For nightscapes and other images, Topaz DeNoise AI performed well, better than it did in earlier versions that left lots of patchy artifacts, something AI programs can be prone to.
While ON1โs new NoNoise AI 2023 performed fine, it proved slightly worse in some cases than its earlier 2022 version. Its new sharpening routine needs work.
Other new programs, notably Topaz Photo AI and Luminarโs Noiseless AI, also need improvement before they are ready to be used for the rigours of astrophotography.
For reasons explained below, I would not recommend DxOโs PureRAW2.ย [See below for comments on the newer DxO PureRaw3, which suffers from the same issues.]
The three test images in Adobe Camera Raw showing the Basic settings applied.
METHODOLOGY
As described below, while some of the programs can be used as stand-alone applications, I tested them all as plug-ins for Photoshop, applying each as a smart filter applied to a developed raw file brought into Photoshop as a Camera Raw smart object.
Most of these programs state that better results might be obtainable by using the stand-alone app on original raw files. But for my personal workflow I prefer to develop the raw files with Adobe Camera Raw, then open those into Photoshop for stacking and layering, applying any further noise reduction or sharpening as non-destructive smart filters.
Many astrophotographers also choose to stack unedited original images with specialized stacking software, then apply further noise reduction and editing later in the workflow. So my workflow and test procedures reflect that.
However, the exception is DxOโs PureRAW2. It can work only on raw files as a stand-alone app, or as a plug-in from Adobe Lightroom. It does not work as a Photoshop plug-in. I tested PureRAW2 by dropping raw Canon .CR3 files onto the app, then exporting the results as raw DNG files, but with the same settings applied as with the other raw files. For the nightscape and wide-field images taken with lenses in DxO’s extensive database, I used PureRAW’s lens corrections, not Adobe’s.
As shown above, I chose three representative images:
A nightscape with star trails and a detailed foreground, at ISO 1600.
A wide-field deep-sky image at ISO 1600 with an 85mm lens, with very tiny stars.
A close-up deep-sky image taken with a telescope and at a high ISO of 3200, showing thermal noise hot pixels.
Each is a single image, not a stack of multiple images.
Before applying the noise reduction, the raw files received just basic color corrections and a contrast boost to emphasize noise all the more.
THE CONTENDERS
In the test results for the three images, I show the original raw image, plus a version with noise reduction and sharpening applied using Adobe Camera Rawโs own sliders, with luminance noise at 40, color noise at 25, and sharpening at 25.
I use this as a base comparison, as it has been the noise reduction I have long applied to images. However, ACRโs routine (also found in Adobe Lightroom) has not changed in years. It is good, but it is not AI.
[See below for an April 2023 update with a comparison of Adobe’s new AI Denoise with DxO DeepPrimeXD and Topaz PhotoAI.]
The new smart AI programs should improve upon this. But do they?
PLEASENOTE:
I have refrained from providing prices and explaining buying options, as frankly some can be complex!
For those details and for trial copies, go to the softwareโs website by clicking on the link in the header product names below.
All programs are available for Windows and MacOS. I tested the latter versions.
I have not provided tutorials on how to use the software; I have just reported on their results. For trouble-shooting their use, please consult the software company in question.
ON1โs main product is the Lightroom/Photoshop alternative program called ON1 Photo RAW, which is updated annually to major new versions. It has full cataloging options like Lightroom and image layering like Photoshop. Its Edit module contains the NoNoise AI routine. But NoNoise AI can be purchased as a stand-alone app that also installs as a plug-in for Lightroom and Photoshop. Itโs what I tested here. The latest 2023 version of NoNoise AI added ON1โs new Tack Sharp AI sharpening routine.
Version tested: 17.0.1
Topaz DeNoise AI’s four-pane view to select the best AI model.
This program has proven very popular and has been adopted by many photographers โ and astrophotographers โ as an essential part of an editing workflow. It performs noise reduction only, offering a choice of five AI models. Auto modes can choose the models and settings for you based on the image content, but you can override those by adjusting the strength, sharpness, and recovery of original detail as desired.
A separate program, Topaz Sharpen AI, is specifically for image sharpening, but I did not test it here. Topaz Gigapixel AI is for image resizing.
Version tested: 3.7.0
Topaz Photo AI’s control interface for its three main functions: noise, sharpening and upscaling.
In 2022 Topaz introduced this new program which incorporates the trio of noise reduction, sharpening and image resizing in one package. Like DeNoise, Sharpen and Gigapixel, Photo AI works as a stand-alone app or as a plug-in for Lightroom and Photoshop. Photo AIโs Autopilot automatically detects and applies what it thinks the image needs. While it is possible to adjust settings, Photo AI offers much less control than DeNoise AI and Topazโs other single-purpose programs.
As of this writing in November 2022 Photo AI is enjoying almost weekly updates, and seems to be where Topaz is focusing its development and marketing effort.ย [See below for a test of PhotoAI v1.3.1, current as of April 2023.]
Version tested: 1.0.9
Luminar Neo’s Edit interface with choices of many filters and effects, including Noiseless AI.
Unlike the other noise reduction programs tested here, Luminar Neo from the software company Skylum is a full-featured image editing program, with an emphasis on one-click AI effects. One of those is the new Noiseless AI, available as an extra-cost extension to the main Neo program, either as a one-time purchase or by annual subscription. Noiseless AI cannot be purchased on its own. However, Neo with most of its extensions does work as a plug-in for Lightroom and Photoshop.
Being new, Luminar Neo is also updated frequently, with more extensions coming in the next few months.
Version tested: 1.5.0
DxO PureRAW’s simple interface with few choices for Noise Reduction settings.
Like ON1, DxO makes a full-featured alternative to Adobeโs Lightroom for cataloging and raw developing called DxO PhotoLab, in version 6 as of late 2022. It contains DxOโs Prime and DeepPrime noise reduction routines. However, as with ON1, DxO has spun off just the noise reduction and lens correction parts of PhotoLab into a separate program, PureRAW2, which runs either as a stand-alone app or as a plug-in for Lightroom โ but not Photoshop, as PureRAW works only on original raw files.
Unlike all the other programs, PureRAW2 offers essentially no options to adjust settings, just the option to apply, or not, lens corrections, and to choose the output format. For this testing I applied DeepPrime and exported out to DNG files.ย [See below for a test of DeepPrimeXD, now offered with PureRaw3.]
Version tested: 2.2
Noise Terminator’s controls allow adjusting strength and detail.
Unlike the other programs tested, NoiseXTerminator from astrophotographer Russell Croman is designed specifically for deep-sky astrophotography. It installs as a plug-in for Photoshop or Affinity Photo, but not Lightroom. It is also available under the same purchased licence as a โprocessโ for PixInsight, an advanced program popular with astrophotographers, as it is designed just for editing deep-sky images.
I tested the Photoshop plug-in version of Noise XTerminator. It receives occasional updates to both the actual plug-in and separate updates to the AI module.
Version tested: 1.1.2, AI model 2
NIGHTSCAPE TEST
As with the other test images, the panels show a highly magnified section of the image, indicated in the inset. I shot the image of Lake Louise in Banff, Alberta with a Canon RF15-35mm lens on a 45-megapixel Canon R5 camera at ISO 1600.
The test results on a sample nightscape.
Adobe Camera Rawโs basic noise reduction did a good job, but like all general routines it does soften the image as a by-product of smoothing out high-ISO noise.
ON1 NoNoise 2023 retained landscape detail better than ACR but softened the star trails, despite me adding sharpening. It also produced a somewhat patchy noise smoothing in the sky. This was with Luminosity backed off to 75 from the auto setting (which always cranks up the level to 100 regardless of the image), and with the Tack Sharp routine set to 40 with Micro Contrast at 0. It left a uniform pixel-level mosaic effect in the shadow areas. Despite the new Tack Sharp option, the image was softer than with last yearโs NoNoise 2022 version (not shown here as it is no longer available) which produced better shadow results.
Topaz DeNoise AI did a better job than NoNoise retaining the sharp ground detail while smoothing noise, always more obvious in the sky in such images. Even so, it also produced some patchiness, with some areas showing more noise than others. This was with the Standard model set to 40 for Noise and Sharpness, and Recover Details at 75. I show the other model variations below.
Topaz Photo AI did a poor job, producing lots of noisy artifacts in the sky and an over-sharpened foreground riddled with colorful speckling. It added noise. This was with the Normal setting and the default Autopilot settings.
Noiseless AI in Luminar Neo did a decent job smoothing noise while retaining, indeed sharpening ground detail without introducing ringing or colorful edge artifacts. The sky was left with some patchiness and uneven noise smoothing. This was with the suggested Middle setting (vs Low and High) and default levels for Noise, Detail and Sharpness. However, I do like Neo (and Skylum’s earlier Luminar AI) for adding other finishing effects to images such as Orton glows.
DxO PureRAW2 did smooth noise very well while enhancing sharpness quite a lot, almost too much, though it did not introduce obvious edge artifacts. Keep in mind it offers no chance to adjust settings, other than the mode โ I used DeepPrime vs the normal Prime. Its main drawback is that in making the conversion back to a raw DNG image it altered the appearance of the image, in this case darkening the image slightly. It also made some faint star trails look wiggly!
Noise XTerminator really smoothed out the sky, and did so very uniformly without doing much harm to the star trails. However, it smoothed out ground detail unacceptably, not surprising given its specialized training on stars, not terrestrial content.
Conclusion: For this image, Iโd say Topaz DeNoise AI did the best, though not perfect, job.
This was surprising, as tests I did with earlier versions of DeNoise AI showed it leaving many patchy artifacts and colored edges in places. Frankly, I was put off using it. However, Topaz has improved DeNoise AI a lot.
Why it works so well, when Topazโs newer program Photo AI works so poorly is hard to understand. Surely they use the same AI code? Apparently not. Photo AIโs noise reduction is not the same as DeNoise AI.
Similarly, ON1โs NoNoise 2023 did a worse job than their older 2022 version. One can assume its performance will improve with updates. The issue seems to be with the new Tack Sharp addition.
NoiseXTerminator might be a good choice for reducing noise in just the sky of nightscape images. It is not suitable for foregrounds, though as of April 2023 its performance on landscapes has improved but is not ideal.ย
WIDE-FIELD IMAGE TEST
I shot this image of Andromeda and Triangulum with an 85mm Rokinon RF lens on the 45-megapixel Canon R5 on a star tracker. Stars are now points, with small ones easily mistaken for noise. Letโs see how the programs handle such an image, zooming into a tiny section showing the galaxy Messier 33.
The test results on a sample wide-field deep-sky image.
Adobe Camera Rawโs noise and sharpening routines do take care of the worst of the luminance and chrominance noise, but inevitably leave some graininess to the image. This is traditionally dealt with by stacking multiple sub-exposures.
ON1 NoNoise 2023 did a better job than ACR, smoothing the worst of the noise and uniformly, without leaving uneven patchiness. However, it did soften star images, almost like it was applying a 1- or 2-pixel gaussian blur, adding a slight hazy look to the image. And yet the faintest stars that appeared as just perceptible blurs in the original image were sharpened to one- or two-pixel points. This was with only NoNoise AI applied, and no Tack Sharp AI. And, as I show below, NoNoise’s default “High Detail” option introduced with the 2022 version and included in the 2023 edition absolutely destroys star fields. Avoid it.
ON1 NoNoise “High Detail” option ruins star fields, as shown at right. Use “Original” instead.
Topaz DeNoise AI did a better job than Camera Raw, though it wasnโt miles ahead. This was with the Standard setting. Its Low Light and Severe models were not as good, surprising as you might think one of those choices would be the best for such an image. It pays to inspect Topazโs various modelsโ results. Standard didnโt erase stars; it actually sharpened the fainter ones, almost a little too much, making them look like specks of noise. Playing with Enhance Sharpness and Recover Detail didnโt make much difference to this behavior.
Topaz Photo AI again performed poorly. Its Normal mode left lots of noise and grainy artifacts. While its Strong mode shown here did smooth background noise better, it softened stars, wiping out the faint ones and leaving colored edges on the brighter ones.
Noiseless AI in Luminar Neo did smooth fine noise somewhat, better than Camera Raw, but still left a grainy background, though with the stars mostly untouched in size and color.
DxO PureRAW2did eliminate noise quite well, while leaving even the faintest stars intact, unlike with the deep-sky image below, which is odd. However, it added some dark halos to bright stars from over-sharpening. And, as with the nightscape example, PureRAWโs output DNG was darker than the raw that went in. I donโt want noise reduction programs altering the basic appearance of an image, even if that can be corrected later in the workflow.
Noise XTerminator performed superbly, as expected โ after all, this is the subject matter it is trained to work on. It smoothed out random noise better than any of the other programs, while leaving even the faintest stars untouched, in fact sharpening them slightly. Details in the little galaxy were also unharmed.
Conclusion: The clear winner was NoiseXTerminator.
Topaz DeNoise was a respectable second place, performing better than it had done on such images in earlier versions. Even so, it did alter the appearance of faint stars which might not be desirable.
ON1 NoNoise 2023 also performed quite well, with its softening of brighter stars yet sharpening of fainter ones perhaps acceptable, even desirable for an effect.
TELESCOPIC DEEP-SKY TEST
I shot this image of the NGC 7822 complex of nebulosity with a SharpStar 61mm refractor, using the red-sensitive 30-megapixel Canon Ra and with a narrowband filter to isolate the red and green light of the nebulas.
Again, the test image is a single raw image developed only to re-balance the color and boost the contrast. No dark frames were applied, so the 8-minute exposure at ISO 3200 taken on a warm night shows thermal noise as single โhot pixelโ white specks.
The test results on a sample deep-sky close-up.
Adobe Camera Raw did a good job smoothing the worst of the noise, suppressing the hot pixels but only by virtue of it softening all of the image slightly at the pixel level. However, it leaves most stars intact.
ON1 NoNoise 2023 also did a good job smoothing noise while also seeming to boost contrast and structure slightly. But as in the wide-field image, it did smooth out star images a little, though somewhat photogenically, while still emphasizing the faintest stars. This was with no sharpening applied and Luminosity at 60, down from the default 100 NoNoise applies without fail. One wonders if it really is analyzing images to produce optimum settings. With no Tack Sharp sharpening applied, the results on this image with NoNoise 2023 looked identical to NoNoise 2022.
Topaz DeNoise AI did another good job smoothing noise, while leaving most stars unaffected. However, the faintest stars and hot pixels were sharpened to be more visible tiny specks, perhaps too much, even with Sharpening at its lowest level of 1 in Standard mode. Low Light and Severe modes produced worse results, with lots of mottling and unevenness in the background. Unlike NoNoise, at least its Auto settings do vary from image to image, giving you some assurance it really is responding to the image content.
Topaz Photo AI again produced unusable results. Its Normal modes produced lots of mottled texture and haloed stars. Its Strong mode shown here did smooth noise better, but still left lots of uneven artifacts, like DeNoise AI did in its early days. It certainly seems like Photo AI is using old hand-me-down code from DeNoise AI.
Noiseless AI in Luminar Neo did smooth noise but unevenly, leaving lots of textured patches. Stars had grainy halos and the program increased contrast and saturation, adjustments usually best left for specific adjustment layers dedicated to the task.
DxO PureRAW2 did smooth noise very well, including wiping out the faintest specks from hot pixels, but it also wiped out the faintest stars, I think unacceptably and more than other programs like DeNoise AI. For this image it did leave basic brightness alone, likely because it could not apply lens corrections to an image taken with unknown optics. However, it added an odd pixel-level mosaic-like effect on the sky background, again unacceptable.
Noise XTerminator did a great job smoothing random noise without affecting any stars or the nebulosity. The Detail level of 20 I used actually emphasized the faintest stars, but also the hot pixel specks. NoiseXTerminator canโt be counted on to eliminate thermal noise; that demands the application of dark frames and/or using dithering routines to shift each sub-frame image by a few pixels when autoguiding the telescope mount. Even so, Noise XTerminator is so good users might not need to take and stack as many images.
Conclusion: Again, the winner was NoiseXTerminator.
Deep-sky photographers have praised โNoiseXโ for its effectiveness, either when applied early on in a PixInsight workflow or, as I do in Photoshop, as a smart filter to the base stacked image underlying other adjustment layers.
Topaz DeNoise is also a good choice as it can work well on many other types of images. But again, play with its various models and settings. Pixel peep!
ON1 NoNoise 2023 did put in a respectable performance here, and it will no doubt improve โ it had been out less than a month when I ran these tests.
Based on its odd behavior and results in all three test images I would not recommend DxOโs PureRAW2. Yes, it reduces noise quite well, but it can alter tone and color in the process, and add strange pixel-level mosaic artifacts.
COMPARING DxO and TOPAZ OPTIONS
DxO and Topaz DeNoise AI offer the most choices of AI models and strength of noise reduction. Here I compare:
Topaz DeNoise AI on the nightscape image using three of its models: Standard (which I used in the comparisons above), plus Low Light and Severe. These show how the other models didnโt do as good a job.
The set below also compares DeNoise AI to Topazโs other program, Photo AI, to show how poor a job it is doing in its early form. Its Strong mode does smooth noise but over-sharpens and leaves edge artifacts. Yes, Photo AI is one-click easy to use, but produces bad results โ at least on astrophotos.
Comparing DeNoise’s and Photo AI’s different model settings.
As of this writing DxOโs PureRAW2 offers the Prime and newer DeepPrime AI models โ I used DeepPrime for my tests.
However, DxOโs more expensive and complete image processing program, PhotoLab 6, also offers the even newer DeepPrimeXD model, which promises to preserve or recover even more โXtra Detailโ over the DeepPrime model. As of this writing, the XD mode is not offered in PureRAW2. Perhaps that will wait for PureRAW3, no doubt a paid upgrade.
[UPDATE MARCH 2023: DxO has indeed brought out PureRaw3 as a paid upgrade that, as expected, offers the DeepPrimeXD. In testing the new version I found that, while it did not seem to alter an image’s exposure as PureRaw2 did, DeepPrime and DeepPrimeXD still unacceptably ruin starry skies, by either adding a fine-scale mosaic effect (DeepPrime) or weird wormy artifacts (DeepPrimeXD). Try it for yourself to see if you find the same.]
Comparing DxO’s various Prime model settings. DeepPrimeXD is only in PhotoLab 6.
The set above compares the three noise reduction models of DxOโs PhotoLab 6. DeepPrime does do a better job than Prime. DeepPrimeXD does indeed sharpen detail more, but in this example it is too sharp, showing artifacts, especially in the sky where it is adding structures and textures that are not real.
However, when used from within PhotoLab 6, the DeepPrime noise reduction becomes more usable. PhotoLab is then being used to perform all the raw image processing, so PureRAWโs alteration of color and tone is not a concern. Conversely, it can also output raw DNGs with only noise reduction and lens corrections applied, essentially performing the same tasks as PureRAW. If you have PhotoLab, you don’t need PureRAW.
APRIL 2023 UPDATE โ TESTING ADOBE’S NEW AI Denoise
In April 2023 Adobe updated Lightroom Classic to v12.3 and the Camera Raw plug-in for Bridge and Photoshop to 15.3. The major new feature was a long-awaited AI noise reduction from Adobe called Denoise. It works only on raw files and generates a new raw DNG file to which all the raw develop settings, including AI masks, can be applied. But the DNG file is some four times larger than the original raw file from the camera.
Here’s a comparison of Camera Raw using the old noise reduction and the new AI option, with DxO’s DeepPrimeXD and Topaz’s PhotoAI, on an aurora image from April 23, 2023:
I used Topaz Photo AI as that’s the program Topaz is now putting all their development effort into, neglecting their other plug-ins such as DeNoise AI. I used DxO PhotoLab 6 with its DeepPrimeXD option to export a DNG with only noise reduction applied, for results identical to what is now offered with DxO’s separate PureRaw3 plug-in.
At 100% above, there’s very little obvious difference. They show up when pixel peeping.
400% blow-ups of the sky – Tap or click to download a full-res JPG
Above are 400% blow-ups of a section of the sky.
Compared to using Adobe’s old noise reduction sliders, their new AI Denoise did a far superior job at smoothing noise, and providing sharpening โย almost too much, making even the smallest stars pop out more, perhaps a good thing. But there’s no control of that sharpening.
DxO’s DeepPrimeXD provides a similar, or perhaps more excessive level of AI sharpening. While it smooths noise, it introduces all manner of wormy AI artifacts. It is unacceptable.
Topaz PhotoAI’s noise reduction and sharpening, here both applied with their AutoPilot settings, smoothed noise, but created a patchy appearance. It also softened the stars, despite having sharpening turned on. It was the worst of the set.
400% blow-ups of a section of the ground y – Tap or click to download a full-res JPG
In a similar set of blow-ups of the ground, the old Adobe noise reduction did just that โ it smoothed only some noise. The new AI Denoise not only smooths noise, it also applies AI-based sharpening, to the point of almost inventing detail. Here it looks believable, but in other tests I have seen it add content, such as structures in the aurora, that looked fake and out of place. Or just plain wrong!
DxO’s DeepPrimeXD’s main feature over the older DeepPrime is the “eXtra Detail” it finds. Here it produces a result similar to Adobe Denoise, though in some areas of this and other images, I find it is over-sharpening. As with Adobe, there is no option for backing off the sharpening. Other than using DeepPrime or Prime noise reduction.
Topaz PhotoAI didn’t do much to add sharpening. If anything, it made the image softer. While PhotoAI has improved with its weekly updates, it still falls far short of the competition, at least for astrophotos and nightscapes.
The bottom line โ Adobe’s new AI Denoise can do a superb job on astrophotos, and will be particularly useful for high-ISO nightscapes, perhaps better than any of the competition. But watch what it does! It can invent details or create results that look artificial. Being able to adjust the sharpening would be helpful. Perhaps that will come in an update.
COMPARING AI TO OLDER NON-AI PROGRAMS
The new generation of AI-based programs have garnered all the attention, leaving older stalwart noise reduction programs looking a little forlorn and forgotten.
Here I compare Camera Raw and two of the best of the AI programs, Topaz DeNoise AI and NoiseXTerminator, with two of the most respected of the โold-schoolโ non-AI programs:
Nik Dfine2’s control interface.
Dfine2, included with the Nik Collection of plug-ins sold by DxO (shown above), and
Reduce Noise v9 sold by Neat Image (shown below).
Neat Image’s Reduce Noise control interface – the simple panel.
I tested both by using them in their automatic modes, where they analyze a section or sections of the image and adjust the noise reduction accordingly, but then apply that setting uniformly across the entire image. However, both allow manual adjustments, with Neat Imageโs Reduce Noise offering a bewildering array of technical adjustments.
How do these older programs stack up to the new AI generation? Here are comparisons using the same three test images.
Comparing results with Neat Image and Nik Dfine2 on the nightscape test image.
In the nightscape image, Nik Dfine2 and Neat Imageโs Reduce Noise did well, producing uniform noise reduction with no patchiness. But the results werenโt significantly better than with Adobe Camera Rawโs built-in routine. Like ACR, both non-AI programs did smooth detail in the ground, compared to DeNoise AI which sharpened the mountain details.
Comparing results with Neat Image and Nik Dfine2 on the wide-field test image.
In the tracked wide-field image, the differences were harder to distinguish. None performed up to the standard of Noise XTerminator, with both Nik Dfine2 and Neat Image softening stars a little compared to DeNoise AI.
Comparing results with Neat Image and Nik Dfine2 on the deep-sky test image.
In the telescopic deep-sky image, all programs did well, though none matched NoiseXTerminator. None eliminated the hot pixels. But Nik Dfine2 and Neat Image did leave wanted details alone, and did not alter or eliminate desired content. However, they also did not eliminate noise as well as did Topaz DeNoise AI or NoiseXTerminator.
The AI technology does work!
YOUR RESULTS MAY VARY
I should add that the nature of AI means that the results will certainly vary from image to image.
In addition, with many of these programs offering multiple models and settings for strength and sharpening, results even from the same program can be quite different. In this testing I used either the programโs auto defaults or backed off those defaults where I thought the effect was too strong and detrimental to the image.
Software is also a constantly moving target. Updates will alter how these programs perform, we hope for the better. For example, two days after I published this test, ON1 updated NoNoise AI to v17.0.2 with minor fixes and improvements.
And do remember Iโm testing on astrophotos, and pixel peeping to the extreme. Rave reviews claiming how well even the poor performers here work on โnormalโ images might well be valid.
This is all by way of saying, your mileage may vary!
So donโt take my word for it. Most programs (Luminar Neo is an exception) are available as free trial copies to test out on your astro-images and in your preferred workflow. Test for yourself. But do pixel peep. Thatโs where youโll see the flaws.
WHAT ABOUT ADOBE?
As noted above, with v15.3 of Camera Raw and v12.3 of Lightroom Classic, Adobe finally introduced their contender into the AI noise reduction contest. And it is a very good entry at that.
But it works only on raw files early in the workflow, and it generates a new raw DNG file, one four times the size of the original. The suggestion is that this technology will expand so that the AI noise reduction can be applied later in the workflow to other file formats.
Indeed, in the last couple of years Adobe has introduced several amazing and powerful โNeural Filtersโ into Photoshop, which work wonders with one click.
Neural network Noise Reduction is coming to Photoshop. One day!
A neural filter for Noise Reduction is on Adobeโs Wait List for development, so perhaps we will see something in the next few months from Adobe, as a version of the AI noise reduction now offered in Lightroom and Camera Raw.
Until then we have lots of choices for third party programs that all improve with every update. I hope this review has helped you make a choice.
โ Alan, November 15, 2022 / Revised April 27, 2023 / AmazingSky.com ย
For once I was able to watch a total eclipse of the Moon under clear skies from home. Good thing, as a snowstorm would have made travel a challenge.ย
On November 8, 2022 the Full Moon once again passed through the umbral shadow of the Earth, as it has done at six-month intervals for the last two years. The Moon turned deep red for almost an hour and a half.
This is the totally eclipsed Moon of November 8, 2022 set in the stars of Aries, with the planet Uranus nearby, visible as the greenish star about three Moon diameters away from the Moon at the 10 o’clock position.
This was to be the last total eclipse of the Moon visible from anywhere in the world until March 14, 2025.
However, in the days leading up to the eclipse weather prospects looked poor. The worse snowstorm โ indeed the first major snowstorm for my area โ was forecast for the day before the eclipse, November 7. Of course!ย
Weather prospects for eclipse time from the Astrospheric app.
For all the lunar eclipses in the last decade visible from my area, I have had to chase to find clear skies, perhaps a couple of hours away or a half dayโs drive away. I documented those expeditions in previous posts, the latest of which is here for the May 15, 2022 total eclipse. In all cases I was successful.ย
However, just once it would be nice to be able to stay home. The last โTLEโ I was able to watch from home was on December 21, 2010. It had been a long decade of lunar eclipse chasing!
But, it looked like another chase might be needed. Weather maps showed possible clear skies to the west and south of me on eclipse night. But cloud over me.
Other forecast models were a bit more optimistic.
The problem was with six inches of new snow having fallen and temperatures forecast to be in the minus 20s Celsius, any drive to a remote site was going to be unwise, especially at 3 am for the start of the eclipse in my time zone in Alberta.
I decided to โ indeed was more or less forced to โ stay put at home and hope for the best. So this was the โsnowbound eclipse!โ
Luckily, as the snowstorm receded east, clear skies followed, providing better conditions than I had expected. What a pleasure it was watching this eclipse from the comfort of home. While operating camera gear at -25ยฐ C was still a challenge, at least I could retreat inside to warm up.
A wide-angle view of the total eclipse of the Moon of November 8, 2022, with the red Moon at right amid the stars of the northern winter sky, plus with bright red Mars at top. Above and left of the Moon is the blue Pleiades star cluster, while below it and to the left is the larger Hyades cluster with reddish Aldebaran in Taurus. The stars of Orion are left of centre, including reddish Betelgeuse, while at far left are the two Dog Stars: Procyon, at top, in Canis Minor, and Sirius, at bottom, in Canis Major.
The view with the naked eye of the red Moon set in the winter sky was unforgettable. And the views though binoculars were, as always, the best for showing off the subtle colour gradations across the lunar disk.
A self-portrait of me observing the total eclipse of the Moon on November 8, 2022, on a very cold (-25ยฐ C) morning at 4 am.
As has been the tradition at the last few eclipses, I shot a souvenir selfie to show I was really there enjoying the eclipse.
A view of the aurora that appeared during the November 8, 2022 total eclipse of the Moon, as the sky darkened to reveal a show of Northern Lights on this very cold and icy night at 4 am.
A bonus was the appearance of some Northern Lights during totality. As the bright Moon dimmed during its passage into Earthโs umbral shadow, darkening the sky, the aurora began to appear to the north, opposite the eclipsed Moon.ย
Not a great display, but it was the first time I can recall seeing aurora during a lunar eclipse.ย
A parting shot of the now partially eclipsed Moon setting in the west down my driveway, early in the morning of November 8, 2022. With the Canon R6 and TTArtisan 21mm lens at f/2.8.
My parting view and photo was of the now partially eclipsed (and here overexposed) Moon emerging from the shadow and shining right down my rural snowbound driveway.
It was a perfect last look from home of a sight we wonโt see again for two and half years.
In a detailed review, I test a โholy trinityโ of premium Canon RF zoom lenses, with astrophotography the primary purpose.
In years past, zoom lenses were judged inferior to fixed-focal length โprimeโ lenses for the demands of astrophotography. Stars are the severest test of a lens, revealing optical aberrations that would go unnoticed in normal images, or even in photos of test charts. Many older zooms just didnโt cut it for discerning astrophotographers, myself included.
The new generation of premium zooms for mirrorless cameras, from Canon, Nikon and Sony, are dispelling the old wisdom that primes are better than zooms. The new zoomsโ optical performance is proving to be as good, if not better than the older generation of prime lenses for DSLR cameras, models often designed decades ago.
The shorter lens-to-sensor โflange distanceโ offered by mirrorless cameras, along with new types of glass, provide lens designers more freedom to correct aberrations, particularly in wide-angle lenses.
While usually slower than top-of-the-line primes, the advantage of zoom lenses is their versatility for framing and composing subjects, great for nightscapes and constellation shots. Itโs nice to have the flexibility of a zoom without sacrificing the optical quality and speed so important for astrophotography. Can we have it all? The new zooms come close to delivering.
The โholy trinityโ of Canon zooms tested were purchased in 2021 and 2022. From L to R they are: RF15-35mm, RF28-70mm, and RF70-200mm
A good thing, because with Canon we have little choice! For top-quality glass in wide-angle focal lengths at least, zooms are the only choice for their mirrorless R cameras. As of this writing in late 2022, Canon has yet to release any premium primes for their RF mount shorter than 50mm. Rumours are a 12mm, 24mm, 28mm, and 35mm are coming! But when?
The three zooms I tested are all โLโ lenses, designating them as premium-performance models. I have not tested any of Canonโs โeconomyโ line of RF lenses, such as their 24mm and 35mm Macro STM primes. Tests Iโve seen suggest they donโt offer the sharpness I desire for most astrophotography.
Contributing to the lack of choice, top-quality third-party lenses from the likes of Sigma (such as their new 20mm and 24mm Art lenses made for mirrorless cameras) have yet to appear in Canon RF mount versions. Will they ever? In moves that evoked much disdain, Samyang and Viltrox were both ordered by Canon to cease production of their RF auto-focus lenses.
For their mirrorless R cameras, Canon has not authorized any third-party lens makers, forcing you to buy costly Canon L glass, or settle for their lower-grade STM lenses, or opt for reverse-engineered manual-focus lenses from makers such as TTArtisan and Laowa/Venus Optics. While they are good, they are not up to the optical standards of Canonโs L-series glass.
I know, as I own several RF-mount TTArtisan wide-angle lenses and the Laowa 15mm f/2 lens. You can find my tests of those lenses at AstroGearToday.com. Look under Reviews: Astrophotography Gear.
RF lenses will fit only on Canon R-series mirrorless cameras. This shows the RF15-35mm on the Canon R5 used for the lens testing.
The trio of RF lenses tested here work on all Canon EOS R-series cameras, including their R7 and R10 cropped-frame cameras. However, they will not work on any Canon DSLRs.
Two of the lenses, the RF15-35mm F/2.8 and RF70-200mm F/4, are designs updated from older Canon DSLR lenses with similar specs. The RF28-70mm F/2 does not have an equivalent focal length range and speed in Canonโs DSLR lens line-up. Indeed, nobody else makes a lens this fast covering the โnormalโ zoom range.
Together, the three lenses cover focal lengths from 15mm to 200mm, with some overlap. A trio of zooms like this โ a wide-angle, normal, and telephoto โ is often called a โholy trinityโ set, a popular combination all camera manufacturers offer to cover the majority of applications.
However, my interest was strictly for astrophotography, with stars the test subjects.
NOTE: CLICK or TAP on a test image to download a full-resolution image for closer inspection. The images, while low-compression JPGs, are large and numerous, and so will take time to fully load and display. Patience!
All images are ยฉ 2022 by Alan Dyer/AmazingSky.com. Use without permission is prohibited.
METHODOLOGY
I tested the trio of lenses on same-night exposures of a starry but moonlit sky, using the 45-megapixel Canon R5 camera mounted on a motorized star tracker to follow the rotating sky. With one exception noted, any distortion of stars from perfect pinpoints is due to lens aberrations, not star trailing. The brighter moonlit sky helped reveal non-uniform illumination from lens vignetting.
I shot each lens wide-open at its maximum aperture, as well as one stop down from maximum, to see how aberrations and vignetting improved.
I did not test auto-focus performance, nor image stabilization (only the RF28-70mm lacks internal IS), nor other lens traits unimportant for astro work such as bokeh or close focus image quality.
I also compared the RF15-35mm on same-night dark-sky tests against a trio of prime lenses long in my stable: the Rokinon 14mm SP, and Canonโs older L-series 24mm and 35mm primes, all made for DSLRs.
The lenses each come with lens hoods that use a click-on mechanism much easier to twist on and off than with the older design used on Canon EF lenses.
TL;DR SUMMARY
Each of the Canon โholy trinityโ of zoom performs superbly, though not without some residual lens aberrations such as corner astigmatism and, in the RF28-70mm, slight chromatic aberration at f/2.
However, what flaws they show are well below the level of many older prime lenses made for DSLR cameras.
The RF lensesโ major optical flaw is vignetting, which can be quite severe at some focal lengths, such as in the RF70-200mm at 200mm. But this flaw can be corrected in processing.
These are lenses that can replace fixed-focal length primes, though at considerable cost, in part justifiable in that they negate the need for a suite of many prime lenses.
The performance of these and other new lenses made for mirrorless cameras from all brands is one good reason to switch from DSLR to mirrorless cameras.
Lens Specs and Applications
Canon RF15-35mm F/2.8 L IS USM
The RF15-35mm is a fine nightscape lens. It extends slightly when zooming with the lens physically longest at its shortest 15mm focal length.
The Canon RF15-35mm F/2.8 L is made primarily for urban photography and landscapes by day. My main application is using it to take landscapes by night, and auroras, where its relatively fast f/2.8 speed helps keeps exposure times short and ISO speeds reasonably low. However, the RF15-35mm can certainly be used for tracked wide-angle Milky Way and constellation portraits.
The lens weighs a moderate 885 grams (31 ounces or 1.9 pounds) with lens hood and end caps, and accepts 82mm filters, larger than the 72mm or 77mm filter threads of most astrophoto-friendly lenses. Square 100mm filters will work well on the lens, even at the 15mm focal length. There are choices, such as from KASE, for light pollution reduction and star diffusion filters in this size and format. I have reviews of these filters at AstroGearToday.com, both here for light pollution filters and here for starglow filters.
Canon offers a lower-cost alternative in this range, their RF14-35mm. But it is f/4, a little slow for nightscape, aurora, and Milky Way photography. I have not tested one.
Canon RF28-70mm F/2 L USM
The RF28-70mm works great for tracked starfields and constellations. It extends when zooming, with it longest at its 70mm focal length.
The big Canon RF28-70mm F/2 is aimed at wedding and portrait photographers, though the lens is suitable for landscape work. While I do use it for nightscapes, my primary use is for tracked Milky Way and constellation images, where its range of fields of view nicely frames most constellations, from big to small.
I justified its high cost by deciding it replaces (more or less!) prime lenses in the common 24mm, 35mm, 50mm, and 85mm focal lengths. Its f/2 speed does bring it into fast prime lens territory. Itโs handy to have just one lens to cover the range.
Canon offers a lower-cost alternative here, too, their RF24-70mm. But it is f/2.8. While this is certainly excellent speed, I like having the option of shooting at f/2. An example is when using narrowband nebula filters such as red hydrogen-alpha filters, where shooting at f/2 keeps exposures shorter and/or ISOs lower when using such dense filters. I use this lens with an Astronomik 12-nanometre H-ฮฑ clip-in filter. An example is in one of the galleries below.
While a clip-in filter shifts the infinity focus point inward (to as close as the 2-metre mark with the RF28-70mm at 28mm, and to 6 metres at 70mm), I did not find that shift adversely affected the lensโs optical performance. Thatโs not true of all lenses.
Make no mistake, the RF28-70mm is one hefty lens, weighing 1530 grams (54 ounces or 3.4 pounds). Its front-heavy mass demands a solid tripod head. Its large front lens accepts big 95mm filters, a rare size with few options available. I found one broadband light pollution filter in this size, from URTH. Otherwise, you need to use in-body clip-in filters. Astronomik makes a selection for Canon EOS R cameras.
Canon RF70-200mm F/4 L IS USM
The RF70-200mm works well for closeups of landscape scenes such as moonrises. It extends the most of all the lenses when zooming to its longest focal length.
The Canon RF70-200mm F/4 is another portrait or landscape lens. I use it primarily for bright twilight planet conjunctions and moonrise scenes, where its slower f/4 speed is not a detriment. However, as my tests show, it can be used for tracked deep-sky images, where it is still faster than most short focal length telescopes.
The RF70-200mm lens weighs 810 grams (28 ounces, or 1.75 pounds) with lens hood and caps, so is light for a 70-to-200mm zoom. It is also compact. At just 140mm long when set to 70mm, it is actually the shortest lens of the trio. However, the barrel extends to 195mm long when zoomed out to 200mm focal length.
Canon offers the more costly and, at 1200 grams, heavier RF70-200mm F/2.8 lens which might be a better choice for deep-sky imaging where the extra stop of speed can be useful. But in this case, I chose the slower, more affordable โ though still not cheap โ f/4 version. It accepts common 77mm filters, as does the f/2.8 version.
Centre Sharpness
Canon RF15-35mm F/2.8 L IS USM
This compares 400% blow-ups of the frame centres at the two extreme focal lengths and at two apertures: wide open at f/2.8 and stopped down to f/4.
Like the other two zoom lenses tested, the RF15-35mm is very sharp on axis. Even wide open, thereโs no evidence of softness and star bloat from spherical aberration, the bane of cheaper lenses.
Coloured haloes from longitudinal chromatic aberration are absent, except at 28mm and 35mm (shown here) when wide open at f/2.8, where bright stars show a little bit of blue haloing. At f/4, this minor level of aberration disappears.
Canon RF28-70mm F/2 L USM
This compares 400% blow-ups of the frame centres at the two extreme focal lengths and at two apertures: wide open at f/2 and stopped down to f/2.8.
The big RF28-70mm is also very sharp on-axis but is prone to more chromatic aberration at f/2, showing slight magenta haloes on bright stars at the shorter focal lengths and pale cyan haloes at 70mm in my test shots. Such false colour haloes can be very sensitive to precise focus, though with refractive optics the point of least colour is often not the point of sharpest focus.
At f/2, stars are a little softer at 70mm than at 28mm. Stopping down to f/2.8 eliminates this slight softness and most of the longitudinal chromatic aberration.
Canon RF70-200mm F/4 L IS USM
This compares 400% blow-ups of the frame centres at the two extreme focal lengths and at two apertures: wide open at f/4 and stopped down to f/5.6.
Unlike prime telephotos Iโve used, the RF70-200mm shows negligible chromatic aberration on-axis at all focal lengths, even at f/4. Stars are a little softer at the longest focal length at f/4, perhaps from slight spherical aberration, though my 200mm test shots are also affected by a little mistracking, trailing the stars slightly.
Stopping down to f/5.6 sharpens stars just that much more at 200mm.
Corner Aberrations
The corners are where we typically separate great lenses from the merely good. And it is where zoom lenses have traditionally performed badly. For example, my original Canon EF16-35mm f/2.8 lens was so bad off-axis I found it mostly unusable for astro work. Not so the new RF15-35mm, which is the RF replacement for Canonโs older EF16-35mm.
To be clear โ in these test shots you might think the level of aberrations are surprising for premium lenses. But keep in mind, to show them at all I am having to pixel-peep by enlarging all the test images by 400 percent, cropping down to just the extreme corners.
Check the examples in the Compared to DSLR Lenses section and in the Finished ImagesGalleries for another look at lens performance in broader context.
Canon RF15-35mm F/2.8 L IS USM
This compares 400% blow-ups of the extreme corners at five focal lengths with the RF15-35mm wide open at f/2.8
Surprisingly, this RFโs best performance off-axis is actually at its shortest focal length. At 15mm it exhibits only some slight tangential astigmatism, elongating stars away from the frame centre. At 24mm aberrations appear slightly worse than at the other focal lengths, showing some flaring from sagittal astigmatism and perhaps coma as well, aberrations seen to a lesser degree at 28mm and 35mm, making stars look like little three-pointed triangles.
This compares 400% blow-ups of the extreme corners at five focal lengths with the RF15-35mm stopped down one stop to f/4.
The aberrations reduce when stopped down to f/4, but are still present, especially at 24mm, this lensโs weakest focal length, though only just.
While the RF15-35mm isnโt perfect, it outperforms other prime lenses I have, and that I suspect most users will own or have used in the past with DSLRs. Only new wide-angle premium primes for the RF mount, if and when we see them, will provide better performance.
Canon RF28-70mm F/2 L USM
This compare 400% blow-ups of the extreme corners at four focal lengths with the RF28-70mm wide open at f/2.
The RF28-70mmโs fast f/2 speed, unusual for any zoom lens, was surely a challenge to design for. Off-axis when wide open at f/2 it does show astigmatism at the extreme corners at all focal lengths, but the least at 50mm, and the worst at 28mm where a little lateral chromatic aberration is also visible, adding slight colour fringing.
This compare 400% blow-ups of the extreme corners at four focal lengths with the RF28-70mm stopped down one stop to f/2.8.
Sharpness off-axis improves markedly when stopped down one stop to f/2.8, where at 50mm stars are now nearly perfect to the corners. Indeed, performance is so good at 50mm, I think there would be little need to buy the Canon RF50mm prime, unless its f/1.2 speed is deemed essential.
With the RF28-70mm at f/2.8, stars still show some residual astigmatism at 28mm and 35mm, but only at the extreme corners.
Canon RF70-200mm F/4 L IS USM
This compare 400% blow-ups of the extreme corners at four focal lengths with the RF70-200mm wide open at f/4.
The RF70-200mm telephoto zoom shows some astigmatism and coma at the corners when wide open at f/4, with it worse at the shorter focal lengths. While lens corrections have been applied here, the 200mm image still shows a darker corner from the vignetting described below.
This compare 400% blow-ups of the extreme corners at four focal lengths with the RF70-200mm stopped down one stop to f/5.6.
Stopping down to f/5.6 eliminates most of the off-axis aberrations at 135mm and 200mm focal lengths but some remain at 70mm and to a lesser degree at 100mm.
This is a lens that can be used at f/4 even for the demands of deep-sky imaging, though perfectionists will want to stop it down. At f/5.6 it is similar in speed to many astrographic refractors, though most of those start at about 250mm focal length.
Frame Vignetting
In the previous test images, I applied lens corrections (but no other adjustments) to each of the raw files in Adobe Camera Raw, using the settings ACR automatically selects from its lens database. These corrections brightened the corners.
In this next set I show the lensesโ weakest point, their high level of vignetting. This light falloff darkens the corners by a surprising amount. In the new generation of lenses for mirrorless cameras, it seems lens designers are choosing to sacrifice uniform frame illumination in order to maximize aberration corrections. The latter canโt be corrected entirely, if at all, by software.
However, corrections applied either in-camera or at the computer can brighten corners, โflatteningโ the field. I show that improvement in the section that follows this one.
Canon RF15-35mm F/2.8 L IS USM
This compares the level of vignetting present in the RF15-35mm without the benefit of lens corrections, showing the difference at five focal lengths.
In the wide-angle zoom, vignetting darkens just the corners at 15mm, but widens to affect progressively more of the frame at the longer focal lengths. The examples show the entire right side of the frame. I show the effect just at f/2.8.
Though I donโt show examples with the two wider zooms, with all lenses vignetting decreases dramatically when each lens is stopped down by even one stop. The fields become much more evenly illuminated, though some darkening at the very corners remains one stop down.
Canon RF28-70mm F/2 L USM
This compares the level of vignetting present in the RF28-70mm without the benefit of lens corrections, showing the difference at four focal lengths.
In this โnormalโ zoom, vignetting performance is similar at all focal lengths, though it affects a bit more of the field at 70mm than at 28mm. Again, while Iโm not presenting an example, vignetting decreases a lot when this lens is stopped down to f/2.8. While the extra stop of speed is certainly nice to have at times, I usually shoot the RF28-70mm at f/2.8.
Canon RF70-200mm F/4 L IS USM
This compares the level of vignetting present in the RF70-200mm without the benefit of lens corrections, showing the difference at four focal lengths.
In this telephoto zoom, vignetting is fairly mild at the shorter focal lengths but becomes severe at 200mm, affecting much of the field. It is far worse than I see with my older Canon EF200mm f/2.8 prime, a lens that is not as sharp at f/4 as the RF zoom.
The faster RF70-200mm f/2.8 lens, which I had the chance to test one night last year, showed as much, if not more, vignetting than the f/4 version. See my test here at AstroGearToday.com. I thought the f/4 version would be better for vignetting, but it is not.
This shows how much the RF-70-200mmโs vignetting improves when it is stopped down.
In this case, as the vignetting is so prominent at 200mm, I show above how much it improves when stopped down to f/5.6, in a comparison with the lens at f/4, both with no lens corrections applied in processing. The major improvement comes from the smaller aperture alone. For twilight scenes, Iโd suggest stopping this lens down to better ensure a uniform sky background.
LENS Corrections
In this next set I show how well applying lens corrections improves the vignetting at the focal lengths where each of the lenses is at its worse, and with each at its widest aperture.
I show this with Adobe Camera Raw but Lightroom would provide identical results. I did not test lens corrections with other programs such as CaptureOne, DxO PhotoLab, or ON1 Photo Raw, which all have automatic lens corrections as well.
Canon RF15-35mm F/2.8 L IS USM
This compare the RF15-35mm lens at f/2.8 and 35mm with and without lens corrections applied, to show how much they improve the vignetting.
Applying lens corrections in Adobe Camera Raw certainly brightened the corners and edges, though still left some darkening at the very corners that can be corrected by hand in the Manual tab.
Canon RF28-70mm F/2 L USM
This compare the RF28-70mm lens at f/2 and 70mm with and without lens corrections applied, to show how much they improve the vignetting.
ACRโs lens corrections helped but did not completely eliminate the vignetting here. Corner darkening remained. Manually increasing the vignetting slider can provide that extra level of correction needed.
Canon RF70-200mm F/4 L IS USM
This compare the RF70-200mm lens at f/4 and 200mm with and without lens corrections applied, to show how much they improve the vignetting.
The high level of vignetting with this lens at 200mm largely disappeared with lens corrections, though not entirely. For deep-sky imaging, users might prefer to shoot and apply flat-field frames. I prefer to apply automatic and manual corrections to the raw files, to stay within a raw workflow as much as possible.
Same Focal Length Comparisons
With the trio of lenses offering some of the same focal lengths, here I show how they compare at three of those shared focal lengths. I zoom into the upper right corners here, as with the Corner Aberrations comparisons above.
RF15-35mm vs. RF28-70mm at 28mm
This compares the RF15-35mm at 28mm to the RF28-70mm also at 28mm and with both at f/2.8.
With both lenses at 28mm and at the same f/2.8 aperture (though the RF28-70mm is now stopped down one stop), itโs a toss up. Both show corner aberrations, though of a different mix, distorting stars a little differently. The RF28-70mm shows some lateral chromatic aberration, but the RF15-35mm shows a bit more flaring from astigmatism.
RF15-35mm vs. RF28-70mm at 35mm
This compares the RF15-35mm at 35mm to the RF28-70mm also at 35mm and with both at f/2.8.
The story is similar with each lens at 35mm. Stars seem a bit sharper in the RF15-35mm though are elongated more by astigmatism at the very corners. Lens corrections have been applied here and with the other two-lens comparison pairs.
RF28-70mm vs. RF70-200mm at 70mm
This compares the RF28-70mm at 70mm and f/2.8 to the RF70-200mm also at 70mm but wide open at f/4.
Here I show the RF28-70mm at f/2.8 and the RF70-200mm wide open at f/4, with both set to 70mm focal length. The telephoto lens shows a little more softening and star bloating from corner aberrations, though both perform well.
Compared to DSLR Lenses
Here I try to demonstrate just how much better at least one of the zooms on test here is compared to older prime lenses made for DSLRs. The Canon lenses are labeled EF, for Canonโs EF lens mount used for decades on their DSLRs and EOS film cameras. Both are premium L lenses.
I shot this set on a different night than the previous examples, with some light cloud present which added various amounts of glows around stars. But the test shots still show corner sharpness and aberrations well, in this case of the upper left corners of all frames.
Canon RF15-35mm at 35mm vs. Canon EF35mm L
This compares the RF15-35mm zoom at 35mm to the older EF35mm L prime lens. Some light cloud added the glows at right.
The Canon EF35mm is the original Mark I version, which Canon replaced a few years ago with an improved Mark II model. So Iโm sure if you were to buy an EF35mm lens now (or if thatโs the model you own) it will perform better than what I show here.
Both lenses are at f/2.8, wide open for the RF lens, but stopped down two stops for the f/1.4 EF lens.
The zoom lens is much sharper to the corners, with far less astigmatism and none of the lateral chromatic aberration and field curvature (softening stars at the very corner) of the old EF35mm prime. I thought the EF35mm was a superb lens, and used it a lot over the last 15 years for Milky Way panoramas. I would not use it now!
Canon RF15-35mm at 24mm vs. Canon EF24mm L
This compares the RF15-35mm zoom at 24mm to the older EF24mm L prime lens.Some light cloud added the glows at right.
Bought in the early years of DSLRs, the EF24mm tested here is also an original Mark I model, since replaced by an improved Mark II 24mm. The old 24mm is good, but shows more astigmatism than the RF lens, and some field curvature and purple chromatic aberration not present at all in the RF lens.
And this is comparing it to the RF lens at its weakest focal length, 24mm. It still handily outperforms the old EF24mm prime.
Canon RF15-35mm at 15mm vs. Rokinon 14mm SP
This compares the RF15-35mm at 15mm to the Rokinon 14mm SP prime lens.
Canon once made an EF14mm f/2.8 L prime, but Iโve never used it. For a lens in this focal length, one popular with nightscape photographers, Iโve used the ubiquitous Rokinon/Samyang 14mm f/2.8 manual lens. While a bargain at about $300, I always found it soft and aberrated at the corners. See my test of 14mm ultra-wides here.
A few years ago I upgraded to the Rokinon 14mm f/2.4 lens in their premium SP series (about $800 for the EF-mount version). While a manual lens, it does have electrical contacts to communicate lens metadata to the camera. Like all EF-mount lenses from any brand, it can be adapted to Canon R cameras using Canonโs $100 EF-EOS R lens adapter.
Older DSLR lenses like the Rokinon SP can be adapted to all Canon R cameras with the Canon lens adapter ring which transmits lens data to the camera.
The Rokinon SP is the only prime I found that beat the RF zoom. It provided sharper images to the corners than the RF15-35mm at 15mm. The Rokinon also offers the slightly faster maximum aperture of f/2.4 (which Canon cameras register as f/2.5). Vignetting is severe, but like the RF lenses can be corrected โ Camera Raw has this lens in its database. What is not so easy to correct is some slight colour shift at the corners.
Another disadvantage, as with many other 14mm lenses, is that the SP lens cannot accept front-mounted filters. The RF15-35mm can.
Nevertheless, until Canon comes out with a 12mm to 14mm RF prime, or allows Sigma to, an adapted Rokinon 14mm SP is a good affordable alternative to the RF15-35mm.
The RF15-35mm (left) takes 82mm filters, the RF28-70mm (centre) requires 95mm filters, but the RF70-200mm (right) can accept common 77mm filters.
Mechanical Points
All the RF lens bodies are built of weight-saving engineered plastic incorporating thorough weather sealing. There is nothing cheap about their fit, finish or handling. Each lens has textured grip rings for the zoom, focus and a control ring that can be programmed to adjust either aperture, ISO, exposure compensation or other settings of your choosing.
As with all modern auto-focus lenses, the manual focus ring on each lens does not mechanically move glass. It controls a motor that in turn focuses the lens, so-called โfocus-by-wire.โ However, I found that focus could be dialled in accurately. But if the camera is turned off, then on again, the lens will not return to its previous focus position. You have to refocus to infinity each time the camera is powered up, a nuisance.
Unlike some Nikon, Sony, Samyang, and Sigma lenses, none of the Canon lenses have a focus lock button, or any way of presetting an infinity focus point, or simply having the lens remember where it was last set. I would hope Canon could address that deficiency in a firmware update.
With all the zooms, I did not find any issue with โzoom creep.โ The telescoping barrels remained in place during long exposures and did not slowly retract when aimed up. While the RF28-70mm and RF70-200mm each have a zoom lock switch, it locks the lens only at its shortest focal length.
Each lens is parfocal within its zoom range. Focus at one zoom position, and it will be in focus for all the focal lengths. I usually focus at the longest focal length where it is easiest to judge focus by eye, then zoom out to frame the scene.
FINISHED IMAGES GALLERIES
Here I present a selection of final, processed images (four for each lens), so you can better see how each performs on real-world celestial subjects. To speed download, the images are downsized to 2048 pixels wide.
As per my comments at top, the RF15-35mm is my primary nightscape lens, the RF28-70mm my lens for wide-field constellation and Milky Way shots, while the RF70-200mm is for conjunctions and Moon scenes. It would also be good for eclipses.
Image Gallery withCanon RF15-35mm F/2.8 L IS USM
Image Gallery withCanon RF28-70mm F/2 L USM
Orion in H-Alpha Light with Narrowband Filter
Image Gallery withCanon RF70-200mm F/4 L IS USM
Click on the images to bring them up full screen with caption information.
CONCLUSIONs and recommendations
If you are a Canon user switching from your aging but faithful DSLR to one of their mirrorless R cameras, each of these lenses will perform superbly for astrophotography. At a price! Each is costly. But the cost of older EF lenses has also increased in recent months.
The other native RF L-series lenses in this focal length range, Canonโs RF50mm and RF85mm f/1.2 primes, are stunning โฆ but also expensive. As Iโm sure any coming RF wide-angle L primes will be, if and when they ever appear!
This shows the relative difference in size and height of the lens trio, with all collapsed to their minimum size.
The cheaper alternative โ not the least because you might already own them! โ is using adapted EF-mount lenses made for DSLRs, either from Canon or other brands. But in many cases, as Iโve shown, the new RF glass is sharper, especially when on a high-resolution camera such as the Canon R5 I used for all the testing.
And thereโs the harsh reality that Canon is discontinuing many EF lenses. You can now buy some only used. For example, the EF135mm f/2 L and EF200mm f/2.8 L are both gone.
Until Canon licenses other companies to issue approved lenses for their RF mount โ if that happens at all โ our choices for native RF lenses are limited. However, the quality of Canonโs L lenses is superb. I now use these zooms almost exclusively, and financed most of their considerable cost by selling off a ream of older cameras and lenses.
If thereโs one lens to buy for most astrophotography, it might be the big RF28-70mm F/2, a zoom lens that comes close to offering it all: flexibility, optical quality and speed. The RF24-70mm F/2.8 is a more affordable choice, though I have not tested one.
If nightscapes are the priority, the RF15-35mm F/2.8 would see a lot of use, as perhaps the only lens youโd need.
Of the trio, the RF70-200mm was the lowest priority on my wish list. But it has proven to be very useful for framing horizon scenes.
The superb optics of these and other new lenses made for mirrorless cameras is one good reason to upgrade from a DSLR to a mirrorless camera, in whatever brand you prefer.
โ Alan, September 21, 2022 / ยฉ 2022 Alan Dyer / AmazingSky.com ย
All images are ยฉ 2022 by Alan Dyer/AmazingSky.com. Use without permission is prohibited.
On August 7, 2022 we were treated to a fine aurora and a superb showing of the anomalous STEVE arc across the sky.
Where I live in southern Alberta we are well positioned to see a variety of so-called “sub-auroral” phenomena โ effects in the upper atmosphere associated with auroras but that appear south of the main auroral arc, thus the term “sub-auroral.”
An arc of a Kp-5 aurora early in the evening just starting a show, but with a fading display of noctilucent clouds low in the north as well.
The main auroral band typically lies over Northern Canada, at latitudes 58ยฐ to 66ยฐ, though it can move south when auroral activity increases. However, on August 7, the Kp Index was predicted to reach Kp5, on the Kp 0 to 9 scale, so moderately active, but not so active it would bring the aurora right over me at latitude 51ยฐ N, and certainly not down over the northern U.S., which normally requires Kp6 or higher levels.
An arc of a Kp-5 aurora over a wheatfield from home in southern Alberta. The panorama takes in the northern stars, from the Big Dipper and Ursa Major at left, to the W of Cassiopeia at top right of centre, with Perseus below Cassiopeia, and Andromeda and Pegasus at right.
So with Kp5, the aurora always appeared in my sky this night to the north, though certainly in a fine display, as I show above.
However, at Kp5, the amount of energy being pumped into the magnetosphere and atmosphere around Earth is high enough to trigger (through mechanisms only beginning to be understood) some of the unique phenomena that occur south of the main aurora. These often appear right over me. That was the case on August 7.
This is a telephoto lens panorama of a low and late-season display of noctilucent clouds in the north on August 7, 2022. This was the latest I had seen NLCs from my latitude of 51ยฐ N.
I captured the above panoramas of the aurora early in the night, when we also were treated to a late season display of noctilucent clouds low in the north. These are high altitude water-vapour clouds up almost as high as the aurora. They are common in June and July from here (we are also in an ideal latitude for seeing them). But early August was the latest I had ever sighted NLCs.
A display of a Kp-5 aurora near its peak of activity on August 7, 2022, taken from home in southern Alberta, over the wheatfield next to my acreage. STEVE appeared later this night. Moonlight from the waxing gibbous Moon low in the southwest illuminates the scene.
As the NLCs faded, the auroral arc brightened, promising a good show, in line with the predictions (which don’t always come true!). The main aurora reached a peak in activity about 11:30 pm MDT, when it was bright and moving along the northern and northeastern horizon. It then subsided in brightness and structure, giving the impression the show was over.
But that’s exactly when STEVE can โ and this night did! โ appear.
A portrait of the infamous STEVE arc of hot flowing gas associated with an active aurora, here showing his distinctive pink colour and the fleeting appearance of the green picket fence fingers that often show up hanging down from the main arc.
Sure enough, about 12:15 am, a faint arc appeared in the east, which slowly extended to cross the sky, passing straight overhead. This was STEVE, short for Strong Thermal Emission Velocity Enhancement.
STEVE is not an aurora per se, which is caused by electrons raining down from the magnetosphere. STEVE is a ribbon of hot (~3000ยฐ) gas flowing east to west. STEVE typically appears for no more than an hour, often less, before he fades from view.
A fish-eye view looking straight up. On this night the green fingers lasted no more than two minutes.
At his peak, STEVE is often accompanied by green “picket-fence” fingers hanging down from the main pink band, which also have a westward rippling motion. These do seem to be caused by vertically moving electrons.
This night I shot with three cameras, with lenses from 21mm to 7.5mm, including two fish-eye lenses needed to capture the full extent of sky-spanning STEVE. I shot still, time-lapses, and real-time videos, compiled below.
Amateur photos like mine have been used to determine the height of STEVE, which seems to be 250 to 300 km, higher than the main components of a normal aurora. Indeed, previous images of mine have formed parts of the data sets for two research papers, with me credited as a citizen scientist co-author.
A closeup of the STEVE arc of hot flowing gas associated with an active aurora.
STEVE is a unique example of citizen scientists working with the professional researchers to solve a mystery that anyone who looks up at the right time and from the right place can see. August 7-8, 2022 and my backyard in Alberta was such a time and place.
A dim Perseid meteor (at top) streaking near the Milky Way on the night of Aug 7-8, 2022, taken as part of a time-lapse set for the STEVE auroral arc in frame as the pink band.
As a bonus, a few frames recorded Perseid meteors, with the annual shower becoming active.
For a video compilation of some of my stills and videos from the night, see this Vimeo video.
A 2.5-minute music video of stills, time-lapses, and real-time videos of STEVE from August 7-8, 2022.
In a format similar to my other popular camera tests, I put the 45-megapixel Canon R5 mirrorless camera through its paces for the demands of astrophotography.
In a sequel to my popular post from September 2021 where I reviewed the Canon R6 mirrorless camera, here is a similar test of its higher-megapixel companion, the Canon R5. Where the R6 has a modest 20-megapixel sensor with relatively large 6.6-micron pixels, the R5 is (at present) Canonโs highest megapixel camera, with 45 megapixels. Each pixel is only 4.4 microns across, providing higher resolution but risking more noise.
Is the higher noise noticeable? If so, does that make the R5 less than ideal for astrophotography? To find out, I tested an R5 purchased locally in Calgary from The Camera Store in May 2022.
NOTE: CLICK orTAP on any image to bring it up full screen for closer inspection. The blog contains a lot of high-res images, so they may take a while to all load. Patience! Thanks!
All images are ยฉ 2022 by Alan Dyer/AmazingSky.com. Use without permission is prohibited.
The Canon R5 uses a full-frame sensor offering 45 megapixels, producing images with 8192 x 5464 pixels, and making 8K video possible.
TL;DR Summary
The Canon R5 proved to be surprisingly low in noise, and has worked very well for nightscape, lunar and deep-sky photography (as shown below), where its high resolution does produce a noticeable improvement to image detail, with minimal penalty from higher noise. Its 8K video capability has a place in shooting the Moon, Sun and solar eclipses. It was not so well suited to shooting videos of auroras.
This is a stack of 12 x 5-minute exposures with a Sharpstar 94EDPH refractor at f/4.5 and the Canon R5 at ISO 800, taken as a test of the R5 for deep-sky imaging. No filters were employed. Close-ups of sub-frames from this shoot with the R5, and also with the R6 and Ra, are used throughout the review.
R5 Pros
The Canon R5 is superb for its:
High resolution with relatively low noise
ISO invariant sensor performance for good shadow recovery
Good live view display with ISO boost in Movie mode
8K video has its attraction for eclipse photography
Good top LCD information screen missing in the R6
No magenta edge โamp glowโ that the R6 shows
Higher 6x and 15x magnifications for precise manual focusing
Good battery life
Pro-grade Type N3 remote port
R5 Cons
The Canon R5 is not so superb for its:
Noise in stills and movies is higher than in the R6
Propensity for thermal-noise hot pixels in shadows
Not so suitable for low-light video as the R6
Overheating in 8K video
Live View image is not as bright as in the R6โs Movie mode
High cost!
The flip-out screen of the R5 (and all recent Canon cameras) requires an L-bracket with a notch in the side (a Small Rig unit is shown here) to accommodate the tilting screen.
CHOOSING THE R5
Since late 2019 my main camera for all astrophotography has been the Canon Ra, a limited-edition version of the original R, Canonโs first full-frame mirrorless camera that started the R series. The Ra had a special infra-red cutoff filter in front of the sensor that passed a higher level of visible deep-red light, making it more suitable for deep-sky astrophotography than a standard DSLR or DSLM (mirrorless) camera. The Ra was discontinued after two years on the market, a lifetime similar to Canonโs previous astronomical โaโ models, the 20Da and 60Da.
I purchased the Canon R6 in late 2021, primarily to use it as a low-light video camera for aurora photography, replacing the Sony a7III I had used for several years and reviewed here. Over the last year, I sold all my non-Canon cameras, as well as the Canon 6D MkII DSLR (reviewed here), to consolidate my camera gear to just Canon mirrorless cameras and lenses.
The R6 has proven to be an able successor to the Sony for me, with the R6’s modest megapixel count and larger pixels making it excellent for low-light video. But the higher resolution of the R5 was still attractive. So I have now added it to my Canon stable. Since doing so, I have put it through several of my standard tests to see how suitable it is for the demands of astrophotography, both stills and video.
Here are my extensive results, broken down by various performance criteria. I hope you will find my review useful in helping you make a purchase decision.
LIVE VIEW FRAMING
This compares the back-of-camera views of the R5 vs. the R6, with both set to their highest ISO in Movie mode for the brightest preview image.
First, why go mirrorless at all? For astrophotography, the big difference compared to even a high-end DSLR, is how much brighter the โLive Viewโ image is when shooting at night. DSLM cameras are always in Live View โ even the eye-level viewfinder presents a digital image supplied by the sensor.
And that image is brighter, often revealing more than what a DSLRโs optical viewfinder can show, a great advantage for framing nightscape scenes, and deep-sky fields at the telescope.
The R5 certainly presents a good live view image. However, it is not as bright nor as detailed as what the R6 can provide when placed in its Movie mode and with the ISO bumped up to the R6โs highest level of ISO 204,800, where the Milky Way shows up, live!
The R5 only goes as high as ISO 51,200, and so as I expected it does not provide as bright or detailed a preview at night as the R6 can. However, the R5 is better than the original R for live-view framing, and better than any Canon DSLR Iโve used.
LIVE VIEW FOCUSING
As with other Canon mirrorless cameras, the R5 offers a Focus Assist overlay (top) to aid manual focusing. It works on bright stars. It also has a 6x and 15x magnifications for even more precise focusing.
Like the R6, the R5 can autofocus accurately on bright stars and planets. By comparison, while the Ra can autofocus on distant bright lights, it fails on bright stars or planets.
Turning on Focus Peaking makes stars turn red, yellow or blue (your choice of colours) when they are in focus, as a reassuring confirmation.
Turning on Focus Guide provides the arrowed overlays shown above.
In manual focus, an additional Focus Aid overlay, also found in the R6, provides arrows that close up and turn green when in focus on a bright star or planet.
Or, as shown above, you can zoom in by 6x or 15x to focus by eye the old way by examining the star image. These are magnification levels higher than the 5x and 10x of the R6 and most other Canon cameras, and are a great aid to precise focusing, necessary to make full use of the R5โs high resolution, and the sharpness of Canonโs RF lenses. The 15x still falls short of the Raโs 30x for ultra-precise focusing on stars, but itโs a welcome improvement nonetheless.
In all, while the R5 is not as good as the R6 for framing in low light, it is better for precise manual focusing using its higher 15x magnification.
NOISE PERFORMANCE โ NIGHTSCAPES
The key camera characteristic for astrophoto use is noise. There is no point in having lots of resolution if, at the high ISOs we use for most astrophotography, the detail is lost in noise. But I was pleasantly surprised that proved not to be the case with the R5.
As I show below, noise is well controlled, making the R5 usable for nightscapes at ISOs up to 3200, if not 6400 when needed in a pinch.
This compares the noise on a dark nightscape at the typical ISOs used for such scenes. A level of noise reduction shown has been applied in Camera Raw.
With 45 megapixels, at the upper end of what cameras offer today, the R5 has individual pixels, or more correctly โphotosites,โ that are each 4.4 microns in size, the โpixel pitch.โ
This is still larger than the 3.7-micron pixels in a typical 24-megapixel cropped-frame camera like the Canon R10, or the 3.2-micron pixels found in a 32-megapixel cropped-frame camera like the Canon R7. Both are likely to be noisier than the R5, though will provide even higher resolution, as well as greater magnification with any given lens or telescope.
By comparison, the 30-megapixel full-frame R (and Ra) has a pixel pitch of 5.4 microns, while the 20-megapixel R6โs pixel pitch is a generous 6.6 microns. Only the 12-megapixel Sony a7SIII has larger 8.5-micron pixels, making it the low-light video champ.
The bigger the photosites (i.e. the larger the pixel pitch), the more photons each photosite can collect in a given amount of time โ and the more photons they can collect, period, before they overfill and clip highlights. More photons equals more signal, and therefore a better signal-to-noise ratio, while the greater โfull-well depthโ yields higher dynamic range.
However, each generation of camera improves the signal-to-noise ratio by suppressing noise via its sensor design and improved signal processing hardware and firmware. The R5 and R6 each use Canonโs latest DIGIC X processor.
This compares the R5 to the R6 and Ra cameras at the high ISOs of 3200 and 6400 often used for Milky Way nightscapes.
In nightscapes the R5 did show more noise at high ISOs, especially at ISO 6400, than the R6 and Ra, but the difference was not large, perhaps one stop at most, if that. What was noticeable was the presence in the R5 of more hot pixels from thermal noise, as described later.
This compares the R5 to the R6 and Ra cameras at the more moderate ISOs of 800 and 1600 used for brighter nightscapes.
At slower ISOs the R5 showed a similar level of noise as the R6 and Ra, but a finer-grained noise than the R6, in keeping with the R5โs smaller pixels. In this test set, the R5 did not exhibit noticeably more noise than the other two cameras. This was surprising.
NOTE: In these comparisons I have not resampled the R5 images down to the megapixel count of the R6 to equalize them, as thatโs not what you would do if you bought an R5. Instead, I have magnified the R6 and Raโs smaller images so we examine the same area of each cameraโs images.
As with the R6, I also saw no โmagic ISOโ setting where the R5 performed better than at other settings. Noise increased in proportion to the ISO speed. The R5 proved perfectly usable up to ISO 3200, with ISO 6400 acceptable for stills when necessary. But I would not recommend the R5 for those who like to shoot Milky Way scenes at ISO 12,800.
For nightscapes, a good practice that would allow using lower ISO speeds would be to shoot the sky images with a star tracker, then take separate long untracked exposures for the ground.
NOTE: In my testing I look first and foremost at actual real-world results. For those interested in more technical tests and charts, I refer you to DxOMarkโs report on the Canon R5.
NOISE PERFORMANCE โ DEEP-SKY
This compares the R5 at the typical ISO settings used for deep-sky imaging, with no noise reduction applied to the raw files for this set. The inset shows the portion of the frame contained in the blow-ups.
Deep-sky imaging with a tracking mount is more demanding, due to its longer exposures of up to several minutes for each โsub-frame.โ
On a series of deep-sky exposures through a telescope, above, the R5 again showed quite usable images up to ISO 1600 and 3200, with ISO 6400 a little too noisy in my opinion unless a lot of noise reduction was applied or many images were shot to stack later.
This compares the R5 to the R6 and Ra cameras at ISO 6400, higher than typically used for deep-sky imaging. No noise reduction was applied to the raw files.
As with the nightscape set, at high ISOs, such as at ISO 6400, the R5 did show more noise than the R6 and Ra, as well as more colour splotchiness in the dark sky, and lower contrast. The lower dynamic range of the R5โs smaller pixels is evident here.
Just as with nightscapes, the lesson with the R5 is to keep the ISO low if at all possible. That means longer exposures with good auto-guiding, but thatโs a best practice with any camera.
This compares the R5 to the R6 and Ra cameras at the lower ISOs of 800 and 1600 best for deep-sky imaging, for better dynamic range. No noise reduction was applied to the raw files.
At lower ISOs that provide better dynamic range, shown above, the difference in noise levels between the three cameras was not that obvious. Each camera presented very similar images, with the R6 having a coarser noise than the Ra and R5.
In all, I was surprised the R5 performed as well as it did for deep-sky imaging. See my comments below about its resolution advantage.
ISO INVARIANCY
The flaw in many Canon DSLRs, one documented in my 2017 review of the 6D Mark II, was their poor dynamic range due to the lack of an ISO invariant sensor design.
Canon R-series mirrorless cameras have largely addressed this weakness. As with the R and R6, the sensor in the R5 appears to be nicely ISO invariant.
Where ISO invariancy shows itself to advantage is on nightscapes where the starlit foreground is often dark and underexposed. Bringing out detail in the shadows in raw files requires a lot of Shadow Recovery or increasing the Exposure slider. Images from an ISO invariant sensor can withstand the brightening โin postโ far better, with minimal noise increase or degradations such as a loss of contrast, added banding, or horrible discolourations.
This shows the same scene with the R5 progressively underexposed by shooting at a lower ISO then boosted in exposure in Adobe Camera Raw.
As I do for such tests, I shot sets of images at the same shutter speed, one well-exposed at a high ISO, then several at successively lower ISOs to underexpose by 1 to 4 stops. I then brightened the underexposed images by increasing the Exposure in Camera Raw by the same 1 to 4 stops. In an ideal ISO invariant sensor, all the images should look the same.
The R5 performed well in images underexposed by up to 3 stops. Images underexposed by 4 stops started to fall apart with low contrast and a magenta cast. This was worse performance than the R6, which better withstood underexposure by as much as 4 stops, and fell apart at 5 stops of underexposure.
While it can withstand underexposure, the lesson with the R5 is to still expose nightscapes as well as possible, likely requiring a separate longer exposure for the dark ground. Expose to the right! Donโt depend on being able to save the image by brightening โin post.โ But again, thatโs a best practice with any camera.
THERMAL NOISE
Here I repeat some of the background information from my R6 review. But it bears repeating, as even skilled professional photographers often misunderstand the various forms of noise and how to mitigate them.
All cameras will exhibit thermal noise in long exposures, especially on warm nights. This form of heat-induced noise peppers the shadows with bright or โhotโ pixels, often brightly coloured.
This is not the same as the shot and read noise that adds graininess to high-ISO images and that noise reduction software can smooth out later in post.
This shows a long-exposure nightscape scene both without and with Long Exposure Noise Reduction turned on. LENR eliminated most, though not all, of the hot pixels in the shadows.
I found the R5 was prone to many hot pixels in long nightscape exposures where they show up in dark, underexposed shadows. I did not find a prevalence of hot pixels in well-exposed deep-sky images.
LONG EXPOSURE NOISE REDUCTION
With all cameras a setting called Long Exposure Noise Reduction (LENR) eliminates this thermal noise by taking a โdark frameโ and subtracting it in-camera to yield a raw file largely free of hot pixels, and other artifacts such as edge glows.
The LENR option on the R5 did eliminate most hot pixels, though sometimes still left, or added, a few (or they might be cosmic ray hits). LENR is needed more on warm nights, and with longer exposures at higher ISOs. So the extent of thermal noise in any camera can vary a lot from shoot to shoot, and season to season.
This compares a long exposure of nothing (with the lens cap on), both without LENR (left) and with LENR (right), to show the extent of just the thermal noise.
The comparison above shows just thermal noise in long exposures with and without LENR, to show its effectiveness. However, bear in mind in this demo the raw files have been boosted a lot in exposure and contrast (using DxO PhotoLab with the settings shown) to exaggerate the visibility of the noise.
Like the R6, when LENR is actively taking a dark frame, the R5โs rear screen indicates โBusy,โ which is annoyingly bright at night, exactly when you would be employing LENR. To hide this display, the only option is to close the screen. Instead, the unobtrusive top LCD screen alone should be used to indicate a dark frame is in progress. It does with the Ra, though Busy also displays on its rear screen as well, which is unnecessary.
As with all mirrorless cameras, the R5 lacks the โdark frame bufferโ present in Canon full frame DSLRs that allows several exposures to be taken in quick succession even with LENR on.
Long Exposure Noise Reduction is useful when the gap in time between exposures it produces is not critical.
With all Canon R cameras, turning on LENR forces the camera to take a dark frame after every light frame, doubling the time it takes to finish every exposure. Thatโs a price many photographers arenโt willing to pay, but on warm nights I find it can be essential, and a best practice, for the reward of cleaner images out of camera. I found it is certainly a good practice with the R5.
TIP: If you find hot pixels are becoming more obvious over time, try this trick: turn on the Clean Manually routine for 30 seconds to a minute. In some cameras this can remap the hot pixels so the camera can better eliminate them.
STAR QUALITY
Using LENR with the R5 did not introduce any oddities such as oddly-coloured, green or wiped-out stars. Even without LENR I saw no evidence of green stars, a flaw that plagues some Sony cameras at all times, or Nikons when using LENR.
This is a single developed raw frame from the stack of four minute exposures used to create the final image shown at the top. It shows sharp and nicely coloured stars, with no odd green stars.
Canons have always been known for their good star colours, and the R5 maintains the tradition. According to DPReview the R5 has a mild low-pass anti-alias filter in front of its sensor. Cameras which lack such a sensor filter do produce sharper images, but stars that occupy only one or two pixels might not de-Bayer properly into the correct colours. I did not find that an issue with the R5.
As in the R6, I also saw no evidence of โstar-eating,โ a flaw Nikons and Sonys have been accused of over the years, due to aggressive in-camera noise reduction even on raw files. Canons have largely escaped charges of star-eating.
RED SENSITIVITY
The R5 I bought was a stock โoff-the-shelfโ model. It is Canonโs now-discontinued EOS Ra that was โfilter-modifiedโ to record a greater level of the deep-red wavelength from red nebulas in the Milky Way. As I show below, compared to the Ra, the R5 did well, but could not record the depth of nebulosity the Ra can, to be expected for a stock camera.
However, bright nebulas will still be good targets for the R5. But if itโs faint nebulosity you are after, both in wide-field Milky Way images and telescopic close-ups, consider getting an R5 โspectrum modifiedโ by a third-party supplier. Or modifying an EOS R.
This compares identically processed four-minute exposures at ISO 800 with the R5 vs. the red-sensitive Ra.
EDGE ARTIFACTS and EDGE GLOWS
DSLRs are prone to vignetting along the top and bottom of the frame from shadowing by the upraised mirror and mirror box. Not having a mirror, and a sensor not deeply recessed in the body, largely eliminates this edge vignetting in mirrorless cameras.
While the Ra shows a very slight vignetting along the bottom of the frame (visible in the example above), the R5 was clean and fully illuminated to the edges, as it should be.
I was also pleased to see the R5 did not exhibit any annoying โamp glowsโ โ dim, often magenta glows at the edge of the frame in long exposures, created by heat emitted from sensor electronics adding infrared (IR) glows to the image.
I saw noticeable amp glows in the Canon R6 which could only be eliminated by taking LENR dark frames. It’s a flaw that has yet to be eliminated with firmware updates. Taking LENR darks is not required with the R5, except to reduce thermal hot pixels as noted above.
With a lack of IR amp glows, the R5 should work well when filter-modified to record either more visible Hydrogen-alpha red light, or deeper into the infrared spectrum.
Resolution โ Nightscapes
Now we come to the very reason to get an R5, its high resolution. Is the difference visible in typical astrophotos? In a word, yes. If you look closely.
If people only see your photos on Facebook or Instagram, no one will ever see any improvement in your images! But if your photos are seen as large prints, or you are simply a stickler for detail, then you will be happy with the R5โs 45 megapixels. (Indeed, you might wish to wait for the rumoured even higher megapixel Canon 5S!)
This compares identically processed four-minute exposures at ISO 800 with the R5 vs. the red-sensitive Ra.
Nightscapes, and indeed all landscape photos by day or by night, is where you will see the benefit of more megapixels. Finer details in the foreground show up better. Images are less pixelated. In test images with all three cameras, the R5 did provide sharper images to be sure. But you do have to zoom in a lot to appreciate the improvement.
Resolution โ lunar imaging
This compares blow-ups of images of the Moon taken through a 5-inch f/6 refractor (780mm focal length) with the R6 and R5.
The Moon through a telescope is another good test of resolution. The above comparison shows how the R5โs smaller 4.4-micron pixels do provide much sharper details and less pixelation than the R6.
Of course, one could shoot at an even longer focal length to increase the โplate scaleโ with the R6. But at that same longer focal length the R5 will still provide better resolution, up to the point where its pixels are sampling more than what the atmospheric seeing conditions permit to be resolved. For lunar and planetary imaging, smaller pixels are always preferred, as they allow you to reach the seeing limit with shorter and often faster optical systems.
Resolution โ deep sky
This compares extreme blow-ups of images of the North America Nebula used for the other tests, shot with a 94mm f/4.5 refractor with the three cameras.
On starfields, the difference is not so marked. As I showed in my review of the R6, with โonlyโ 20 megapixels the R6 can still provide detailed deep-sky images.
However, in comparing the three cameras above, with images taken at a focal length of 420mm, the R5 does provide sharper stars, with faint stars better recorded, and with less blockiness (i.e. โsquare starsโ) on all the star images. At that focal length the plate scale with the R5 is 2.1 arc seconds per pixel. With the R6 it is 3.2 arc seconds per pixel.
This is dim green Comet PanSTARRS C/2017 K2, at top, passing above the star clusters IC 4756 at lower left and NGC 6633 at lower right on May 25-26, 2022. This is a stack of ten 5-minute exposures with a William Optics RedCat 51 at f/4.9 and the Canon R5 at ISO 800.
The R5 is a good choice for shooting open and globular star clusters, or any small targets such as planetary nebulas, especially with shorter focal length telescopes. Bright targets will allow using lower ISOs, mitigating any of the R5โs extra noise.
With an 800mm focal length telescope, the plate scale with the R5 will be 1.1 arc seconds per pixel, about the limit most seeing conditions will permit resolving. With even longer focal length telescopes, the R5โs small pixels would be oversampling the image, with little gain in resolution, at least for deep-sky subjects. Lunar and planetary imaging can benefit from plate scales of 0.5 arc seconds per pixel or smaller.
CAN YOU CreatE resolution?
This compares an original R6 image with the same image rescaled 200% in ON1 Resize AI and Topaz Gigapixel AI, and with those three compared to an original R5 image.
Now, one can argue that todayโs AI-driven scaling programs such as ON1 Resize AI and Topaz Gigapixel AI can do a remarkable job up-sizing images while enhancing and sharpening details. Why buy a higher-megapixel camera when you can just sharpen images from a lower-resolution model?
While these AI programs can work wonders on regular images, Iโve found their machine-learning seems to know little about stars, and can often create unwanted artifacts.
In scaling up an R6 image by 200%, ON1 Resize AI 2022 made a mess of the stars and sky background. Topaz Gigapixel AI did a much better job, leaving few artifacts. But using it to double the R6 image in pixel count still produced an image that does not look as sharp as an original R5 image, despite the latter having fewer pixels than the upsized R6 image.
Yes, we are definitely pixel-peeping! But I think this shows that it is better to have the pixels to begin with in the camera, and to not depend on software to generate sharpness and detail.
VIDEO Resolution
The R5โs 45-megapixel sensor also makes possible its headline selling point when it was released in 2020: 8K movie recording, with movies sized 8192 x 4320 (DCI standard) or 7680 x 4320 (UHD standard) at 29.97 frames per second, almost IMAX quality.
Where the R6โs major selling point for me was its low-light video capability, the R5โs 8K video prowess was less important. Or so I thought. With testing, I can see it will have its place in astrophotography, especially solar eclipses.
The R5 offers the options of 8K and 4K movies each in either the wider DCI Digital Cinema standard (8K-D and 4K-D) or more common Ultra-High Definition standard (8K-U and 4K-U), as well as conventional 1080 HD.This shows the Moon shot with the same 460mm-focal length telescope, with full-width frame grabs from movies shot in 8K, 4K, and 4K Movie Crop modes.
Unlike the original Canon R and Rp, the R5 and R6 can shoot 4K movies sampled from the full width of their sensors, so there is no crop factor in the field of view recorded with any lens.
However, like the R6, the R5 also offers the option of a Movie Crop mode which samples a 4K movie from the central 4096 (4K-D) or 3840 (4K-U) pixels of the sensor. As I show above, this provides a โzoomed-inโ image with no loss of resolution, useful when wide field of view is not so important as is zooming into small targets, such as for lunar and solar movies.
This compares close-ups of frame grabs of the Moon movies shown in full-frame above, as well as a frame from an R6 movie, to compare resolutions.
So what format produces the best resolution when shooting movies? As I show above, magnified frame grabs of the Moon demonstrate that shooting at 8K provides a much less pixelated and sharper result than either the 4K-Fine HQ (which creates a โHigh-Qualityโ 4K movie downsampled from 8K) or a standard 4K movie.
Shooting a 4K movie with the R6 also produced a similar result to the 4K movies from the R5. The slightly softer image in the R5โs 4K frame can, I think, be attributed more to atmospheric seeing.
Solar eclipse use
Shooting the highest resolution movies of the Moon will be of prime interest to astrophotographers when the Moon happens to be passing in front of the Sun!
That will happen along a narrow path that crosses North America on April 8, 2024. Capturing the rare total eclipse of the Sun in 8K video will be a goal of many. At the last total solar eclipse in North America, on August 21, 2017, I was able to shoot it in 4K by using a then state-of-the-art top-end Canon DSLR loaned to me by an IMAX movie production company!
And who knows, by 2024 we might have 100-megapixel cameras capable of shooting and recording the firehose of data from 12K video! But for now, even 8K can be a challenge.
This compares the R5 at 8K with it in the best quality 4K Fine HQ vs. the R5 and R6 in their 4K Movie Crop modes.
However, do you need to shoot 8K to get sharp Moon, Sun or eclipse movies? The above shows the 8K frame-grab compared to the R5โs best quality full-frame 4K Fine, and the R5โs and R6โs 4K Movie Crop mode that doesnโt resample or bin pixels from the larger sensor to create a 4K movie. The Cropped movies look only slightly softer than the R5 at 8K, with less pixelation than the 4K Fine HQ movie.
When shooting the Sun or Moon through a telescope or long telephoto lens, the wide field of a full-frame movie might not be required, even to take in the two- or three-degree-wide solar corona around the eclipsed Sun.
However, if a wide field for the maximum extent of the outer corona, combined with sharp resolution is the goal, then a camera like the Canon R5 capable of shooting 8K movies will be the ticket.
And 8K will be ideal for wide-angle movies of the passage of the Moonโs shadow during any eclipse, or for moderate fields showing the eclipsed Sun flanked by Jupiter and Venus on April 8, 2024.
Canon CLOG3
This shows the difference (using frame grabs from 4K movies) between shooting in Canon C-Log3 and shooting with normal โin-cameraโ colour grading. The exposures were the same.
Like the R6, the R5 offers the option of shooting movies in Canonโs C-Log3 profile, which records internally in 10-bit, preserving more dynamic range in movies, up to 12 stops. The resulting movie looks flat, but when โcolour gradedโ later in post, the movie records much more dynamic range, as I show above. Without C-Log3, the bright sunlit lunar crescent is blown out, as will be the Sunโs inner corona.
The bright crescent Moon with dim Earthshine is a good practice-run stand-in for the eclipsed Sun with its wide range of brightness from the inner to the outer corona.
Sample Moon Movies
For the full comparison of the R5 and R6 in my test shoot of the crescent Moon, see this narrated demo movie on Vimeo for the 4K movies, shot in various modes, both full-frame and cropped, with C-Log3 on and off.
Keep in mind that video compression in the on-line version may make it hard to see the resolution difference between shooting modes.
A “private link” 10-minute video on Vimeo demonstrating 4K video clips with the R5 and R6.
For a movie of the 8K footage, though downsized to 4K for the Vimeo version (the full sized 8K file was 29 Gigs!), see this sample movie below on Vimeo.
A “private link” video on Vimeo demonstrating 8K video clips with the R5.
LOw-Light VIDEO
Like the R6, the R5 can shoot at a dragged shutter speed as slow as 1/8-second. That slow shutter, combined with a fast f/1.4 to f/2 lens, and ISOs as high as 51,200 are the keys to shooting movies of the night sky.
Especially auroras. Only when auroras get shadow-casting bright can we shoot at the normal 1/30-second shutter speed of movies and at lower ISOs.
This compares frame grabs of aurora movies shot the same night with the R5 at 8K and 4K with the Canon R6 at 4K, all at ISO 51,200.
I was able to shoot a decent aurora one night from home with both the R5 and R6, and with the same fast TTArtisan 21mm f/1.5 RF lens. The sky and aurora changed in brightness from the time I shot with the R6 first to the R5 later. But even so, the movies serve as a look at how the two cameras perform for real-time aurora movies.
Auroras are where we need to shoot full-frame, for the maximum field of view, and at high ISOs. The R5โs maximum ISO is 51,200, while the R6 goes up to 204,800, though it is largely unusable at that speed for actual shooting, just for previewing scenes.
As expected, the R6 was much less noisy than the R5, by about two stops. The R5 is barely usable at ISO 51,200, while the R6 works respectably well at that speed. If auroras get very bright, then slower ISOs can be used, making the R5 a possible camera for low-light use, but it would not be a first choice, unless 8K auroras are a must-have.
Sample aurora Movies
For a narrated movie comparing the R5 and R6 at 4K on the aurora, stepping both through a range of ISO speeds, see this movie at Vimeo.
A “private link” video on Vimeo demonstrating 4K aurora clips with the R5 and R6.
For a movie showing the same aurora shot with the R5 at 8K, see this movie. However, it has been down-sized to 4K for on-line viewing, so youโll see little difference between it and the 4K footage. Shooting at 8K did not improve or smooth noise performance.
A “private link” video on Vimeo demonstrating 8K aurora clips with the R5.
BATTERY LIFE โ Stills and video
Canonโs new LP-E6NH battery supports charging through the USB-C port and has a higher 2130mAh capacity than the 1800mAh LP-E6 batteries. However, the R5 is compatible with the older batteries.
Like the R6, the R5 comes with a new version of Canonโs standard LP-E6 battery, the LP-E6NH.
On mild nights, I found the R5 ran fine on one battery for the 3 to 4 hours needed to shoot a time-lapse sequence, or set of deep-sky images, with power to spare. Now, that was with the camera in โAirplane Mode,โ which I always use regardless, to turn off the power-consuming WiFi and Bluetooth, which I never use on cameras.
As I noted with the R6, for demanding applications, especially in winter, the R5 can be powered by an outboard USB power bank that has Power Delivery or โPDโ capability.
The exception for battery use is when shooting videos, especially 8K. That can drain a battery after an hour of recording, though it takes only 10 to 12 minutes of 8K footage to fill a 128 gigabyte card. While less than half that length will be needed to capture any upcoming total eclipse from diamond ring to diamond ring, the result is still a massive file.
OVERHEATING
More critically, the R5 is also infamous for overheating and shutting down when shooting 8K movies, after a time that depends on how hot the environment is. I found the R5 shot 8K or 4K Fine HQ for about 22 minutes at room temperature before the overheat warning first came on, then shut off recording two or three minutes later. Movie recording cannot continue until the R5 cools off sufficiently, which takes at least 10 to 15 minutes.
That deficiency might befoul unwary eclipse photographers in 2024. The answer for โno-worryโ 8K video recording is the Canon R5C, the video-centric version of the R5, with a built-in cooling fan.
Features and usability
While certainly not designed with astrophotography in mind, the R5 has several hardware and firmware features that are astrophoto friendly.
The R5โs Canon-standard flip screen
Like all Canon cameras made in the last few years, the R5 has Canonโs standard articulated screen, which can be angled up for convenient viewing when on a telescope. It is also a full touch screen, with all important camera settings and menus adjustable on screen, good for use at night.
With 2.1 million dots, the R5โs rear screen has a higher resolution than the 1.62-million-dot screen of the R6, and much higher than the 1 million pixels of the Rpโs screen, but is the same resolution as in the R and Ra.
The R5โs top-mounted backlit LCD screen
The R5, like the original R, has a top backlit LCD screen for display of current camera settings, battery level and Bulb timer. The lack of a top screen was one of my criticisms of the R6.
Yes, the hardware Mode dial of the R6 and Rp does make it easier to switch shooting modes, such as quickly changing from Stills to Movie. However, for astrophotography the top screen provides useful information during long exposures, and is handy to check when the camera is on a telescope or tripod aimed up to the sky, without spoiling dark adaptation. I prefer to have one.
The R5โs front-mounted N3-style remote port
The R5โs remote shutter port, used for connecting external intervalometers or time-lapse motion controllers, is Canonโs professional-grade three-pronged N3 connector. Itโs sturdier than the 2.5mm mini-phono plug used by the Rp, R and R6. Itโs a plus for the R5.
As with all new cameras, the R5โs USB port is a USB-C type. A USB-C cable is included.
The R5โs back panel buttons and controls
Like the R6, the R5 has a dedicated magnification button on the back panel for zooming in when manually focusing or inspecting images. In the R and Ra, that button is only on the touch panel rear screen, where it has to be called up by paging to that screen, an inconvenience. While virtual buttons on a screen are easier to see and operate at night than physical buttons, I find a real Zoom button handy as itโs always there.
The R5โs twin cards, a CFexpress Type B and an SD UHS-II
To handle the high data rates of 8K video and also 4K video when set to the high frame rate option of 120 fps, one of the R5โs memory card slots requires a CFexpress Type B card, a very fast but more costly format.
As I had no card reader for this format, I had to download movies via a USB cable directly from the camera to my computer, using Canonโs EOS Utility software, as Adobe Downloader out of Adobe Bridge refused to do the job. Plan to buy a card reader.
Allocating memory card use
In the menus, you can choose to record video only to the CFexpress, and stills only to the SD card, or both stills and movies to each card for a backup, with the limitation that 8K and 4K 120fps wonโt record to the SD card, even very fast ones.
FIRMWARE FEATURES
Setting the Interval Timer
Unlike the Canon R and Ra (which both annoyingly lack a built-in intervalometer), but like the R6, the R5 has an Interval Timer in its firmware. This can be used to set up a time-lapse sequence, but with exposures only up to the maximum of 30 seconds allowed by the cameraโs shutter speed settings, true of most in-camera intervalometers. Even so, this is a useful function for simple time-lapses.
Setting the Bulb Timer
As with most recent Canon DSLRs and DSLMs, the R5 also includes a built-in Bulb Timer. This allows setting an exposure of any length (many minutes or hours) when the camera is in Bulb mode. However, it cannot be combined with the Interval Timer for multiple exposures; it is good only for single shots. Nevertheless, I find it useful for shooting long exposures for the ground component of nightscape scenes.
Custom button functions
While Canon cameras donโt have Custom Function buttons per se (unlike Sonys), the R5โs various buttons and dials can be custom programmed to functions other than their default assignments. I assign the * button to turning on and off the Focus Peaking display and, as shown, the AF Point button to a feature only available as a custom function, one that temporarily brightens the rear screen to full, good for quickly checking framing at night.
Assigning Audio Memos to the Rate button
A handy feature of the R5 is the ability to add an audio notation to images. You shoot the image, play it back, then use the Rate button (if so assigned) to record a voice memo of up to 30 seconds, handy for making notes in the field about an image or a shoot. The audio notes are saved as WAV files with the same file number as the image.
The infamous Release Shutter Without Lens command
Like other EOS R cameras, the R5 has this notorious โfeatureโ that trips up every new user who attaches their Canon camera to a telescope or manual lens, only to find the shutter suddenly doesnโt work. The answer is to turn ON โRelease Shutter w/o Lensโ found buried under Custom Functions Menu 4. Problem solved!
OTHER FEATURES
I provide more details of other features and settings of the R5, many of which are common to the R6, in my review of the R6 here.
Multi-segment panoramas with the R5, like this aurora scene, yield superb resolution but can become massive in size, pressing the ability of software and hardware to process them.
CONCLUSION
No question, the Canon R5 is costly. Most buyers would need to have very good daytime uses to justify its purchase, with astrophotography a secondary purpose.
That said, other than low-light night sky videos, the R5 does work very well for all forms of astrophotography, providing a level of resolution that lesser cameras simply cannot.
Nevertheless, if it is just deep-sky imaging that is of interest, then you might be better served with a dedicated cooled-sensor CMOS camera, such as one of the popular ZWO models, and the various accessories that need to accompany such a camera.
But for me, when it came time to buy another premium camera, I still preferred to have a model that could be used easily, without computers, for many types of astro-images, particularly nightscapes, tracked wide-angle starfields, as well as telescopic images.
Since buying the R5, after first suspecting it would prove too noisy to be practical, it has in fact become my most used camera, at least for all images where the enhanced red sensitivity of the EOS Ra is not required. But for low-light night videos, the R6 is the winner.
However, to make use of the R5โs resolution, you do have to match it with sharp, high-quality lenses and telescope optics, and have the computing power to handle its large files, especially when stitching or stacking lots of them. The R5 can be just the start of a costly spending spree!
โ Alan, June 23, 2022 / ยฉ 2022 Alan Dyer / AmazingSky.com
Once again, catching the eclipsed Moon required a chase to clear skies.
As with every previous eclipse of the Moon visible from my area in the last decade, I didn’t have the luxury of watching it from home, but had to chase to find clear skies.
However, the reward was the sight of the reddened Moon from one of my favourite locations in Alberta, Reesor Lake, in Cypress Hills Interprovincial Park.
The eclipse in question was the total lunar eclipse of May 15/16, 2022. As with any eclipse, planning starts with a look at the weather forecasts, or more specifically cloud forecasts.
A few days prior, conditions didn’t look good from my home, to the west of the red marker.
Cloud forecast two days prior.
But as the chart from the app Astrospheric shows, very clear skies were forecast for southeast Alberta, in the Cypress Hills area, where I have shot many times before.
Except as eclipse evening drew closer, the forecast got worse. Now, the clouds were going to extend to my chosen site, with a particularly annoying tongue of cloud right over my spot. Clouds were going to move in just as the total eclipse began. Of course!
Cloud forecast the morning of the eclipse.
I decided to go for it anyway, as the Moon would be to the east, in the direction of the clear skies. It didn’t need to be clear overhead. Nor did I want to drive any farther than I really needed, especially to another location with an unknown foreground.
The spot I chose was one I knew well, on the west shore of scenic Reesor Lake, near the Alberta/Saskatchewan border, but on the Alberta side of Cypress Hills Interprovincial Park.
Handily, TPE provides moonrise times and angles for the chosen location, as well as eclipse times for that time zone.
The companion app, TPE 3D, provides a preview of the scene in 3D relief, with the hills depicted, as a check on Moon altitude and azimuth with respect to the horizon below.
TPE 3D’s simulation
As you can see the simulation matched reality quite well, though the image below was from an earlier time than the simulation, which was for well after mid-totality.
The eclipse over Reesor Lake, in the last stages of the partial eclipse.
However, true to the predictions, clouds were moving in from the west all during the eclipse, to eventually obscure the Moon just as it entered totality and became very dim. Between the clouds and the dark, red Moon, I lost sight of it at totality. As expected!
Below is my last sighting, just before totality began.
The eclipsed Full Moon rising over Reesor Lake in Cypress Hills Interprovincial Park, Alberta, on May 15, 2022.
However, I was content at having captured the eclipse from a photogenic site. More images of a complete eclipse would have been nice, but alas! I still consider the chase a success.
A panorama of the eclipsed Full Moon rising over Reesor Lake in Cypress Hills Interprovincial Park, Alberta, on May 15, 2022.
Just for fun, I shot a quick panorama of three segments, and it turned out to be my favourite image from the eclipse, capturing the scene very well. Pelicans and geese were plying the calm waters of the lake. And owls were hooting in the woods. It was a fabulous evening!
Me at Reesor Lake after shooting the lunar eclipse of May 15, 2022, with the Moon now in clouds behind me.
Before departing, I took my customary “trophy” shot, of the eclipse hunter having bagged his game.
Interestingly, this eclipse was a close repeat of one 19 years earlier to the day, because of the so-called Metonic Cycle where eclipses of the Sun and Moon repeat at 19-year intervals on the same calendar day, at least for 2 or 3 cycles.
The trophy shot from May 15, 2003.
On May 15, 2003, we also had a total lunar eclipse in the early evening, with the eclipsed Moon rising into a spring twilight sky. I also chased clear skies for that one, but in the opposite direction from home, to the southwest, to the foothills. At that time it was all film, and medium format at that.
Total eclipse of the Moon seen May 15, 2003 from southern Alberta (from a site west of Nanton). The Moon rose as totality started so was deep into totality by the time it was high enough to see and sky dark enough to make it stand out. Pentax 67 camera with 165mm lens at f/2.8 with Fujichrome 100F slide film.
So it was another (partially!) successful eclipse chase.
The next opportunity is on the night of November 7/8, 2022, a time of year not known for clear skies!
Just once I would like to see one from home, to make it easier to shoot with various telescopes and trackers, as the reddened Moon will be west of the photogenic winter Milky Way, and very close to the planet Uranus. Plus for me in Alberta the November eclipse occurs in the middle of the night, making a home eclipse much more convenient. After that, the next chance is March 13/14, 2025.
But no matter the eclipse, I suspect another chase will be in order! It just wouldn’t be a lunar eclipse without one.
Two total eclipses of the Moon, an all-planet array across the sky, and a fine close approach of Mars highlight the astronomical year of 2022.
In this blog, I provide my selection of the best sky sights of 2022. I focus on events you can actually see, and from North America. I also emphasize photogenic events, such as gatherings of the Moon and planets at dawn or dusk, and the low Full Moons of summer.
The sky charts are for my longitude in Alberta and my home latitude of 51ยฐ N, farther north than many readers will likely live. From more southerly latitudes in North America, the low planet gatherings at dawn or dusk will be more obvious, with the objects higher and in a darker sky than my charts depict.ย
Feel free to share the link to my blog, or to print it out for reference through the year.
Highlights: Lunar Eclipses, Planet Array and Mars
As in 2021, this year we have two lunar eclipses, both total this year, six months apart in May and in November. On the night of May 15/16 eastern North America gets the best view of a deep total eclipse that lasts 85 minutes. Six lunar cycles later, western North America gets the best view of another 85-minute-long total lunar eclipse.ย
The year begins with four planets in the evening sky, but not for long. They all soon move into the morning sky for the rest of the first half of 2022. In fact, in late June we have the rare chance to see all five naked eye planets lined up in order (!) across the morning sky.
The โstarโ planet of 2022 is Mars, as it reaches one of its biennial close approaches to Earth, and a decent one at that, with its disk relatively large and the planet high in the winter sky, making for excellent telescope views. The night Mars is directly opposite the Earth and at its brightest coincides with a Full Moon, which just happens to also pass in front of Mars that night! Thatโs a remarkable and rare event to round out a year of stargazing.
The RASC has also partnered with Firefly Books to publish a more popular-level guide to the coming yearโs sky for North America, as the 2022 Night Sky Almanac, authored by Canadian science writer Nicole Mortillaro. It provides excellent monthly star charts to help you learn the sky.
January
The year begins with a chance to see four planets together at dusk. But catch them quick!ย
January 4 โ Mercury, Venus (just!), Jupiter and Saturn, plus the Moon
Venus is sinking out of sight fast, as it approaches its January 8 conjunction with the Sun, putting it out of sight. But Mercury is climbing higher, approaching its January 7 greatest angle away from the Sun.
This night the waxing crescent Moon appears below Saturn. It was below Mercury on January 3, and will be below Jupiter on January 5. On January 13, Mercury shines 3.5 degrees (ยฐ) below Saturn, just before both disappear close to the Sun.
This is a comparison pair of the Full Moon at apogee (farthest from Earth for the year) at left, and at perigee (closest to Earth) at right, with the perigean Moon being a so-called “Supermoon”.
January 17 โ The 2022 Mini-Moon
The Full Moon this night is the most distant, and therefore the smallest, of 2022. Shoot it and the Full Moon of July with identical gear to collect a contrasting pair of Mini and Super Moons, as above.ย
January 29 โ Waning Moon and Morning Planets
By the end of January, Mercury and Venus have both moved into the morning sky, where they join Mars. The waning crescent Moon appears below magnitude 1.5 Mars this morning, as the famed red planet begins its fine appearance for 2022.ย
February
The main planet action migrates to the morning sky, while Zodiacal Light season begins in the evening. ย
February 16 โ Mercury As a Morning Star
Though not a favourable elongation for northern latitudes, on February 16 Mercury reaches its highest angle away from the Sun low in the eastern dawn, below Venus and Mars, with Venus having just reached its greatest brilliancy (at a blazing magnitude -4.9!) on February 12, shining above much dimmer Mars. (Magnitude 0 to 1 is a bright star; magnitude 6 is the faintest naked-eye star; any magnitude of -1 to -5 is very bright.)ย
While at magnitude 0, elusive Mercury shines a magnitude and a half brighter than Mars, Mercuryโs lower altitude will make it tougher to see. Use binoculars to pick it out. But Venus remains a brilliant and easy โmorning starโ for the next few months.
A 360ยฐ panorama of the spring sky over the Badlands of Dinosaur Provincial Park, Alberta, on March 29, 2019. At bottom is the tapering pyramid-shaped glow of the Zodiacal Light
February 18 โ Zodiacal Light Season Begins in the Evening
From sites away from light pollution look for a faint glow of light rising out of the southwest sky on any clear evening for the next two weeks with no Moon. This glow is caused by sunlight reflecting off cometary dust particles in the inner solar system. The next moonless window for the evening Zodiacal Light is March 20 to early April.ย Spring is the best season for seeing and shooting the Light in the evening sky.
February 27 โ Moon Joins the Morning Planet Party
The waning crescent Moon appears very low below Mars and Venus, with Mercury still in view, and Saturn just beginning to emerge from behind the Sun.
March
Equinox brings a favourable season for great auroras, while the morning planets begin to cluster in the east.ย
A panorama of the auroral arc seen from home in southern Alberta (latitude 51ยฐ N) on April 14/15, 2021.
March 1 on โ Prime Aurora Season Begins
While great auroras can occur in any month, statistically the best displays often occur around the two equinoxes in spring and autumn. No one can predict more than 12 to 48 hours ahead (and still with a great deal of uncertainty) when a display will be visible from mid-latitudes. But watch sites such as SpaceWeather.com for heads-up notices.
A capture of a line of geosats (geostationary communication satellites) as they flare in brightness during one of their semi-annual “flare” seasons near the equinoxes.
March 1 on โ Flaring Geosat Season Begins
In the weeks prior to the spring equinox, and in the few weeks after the autumn equinox, the string of communication satellites in geostationary orbit catch the sunlight and flare to naked-eye brilliance. Long-exposure tracked photos of the area below Leo (in spring, as here) will catch them as streaks, as the camera follows the stars causing the stationary satellites to trail.
March 12 โ Venus and Mars in Conjunction
Venus and Mars reach their closest separation 4ยฐ apart low in the southeastern dawn sky.
March 20 โ Equinox at 11:33 a.m. EDT
Spring officially begins for the northern hemisphere, autumn for the southern, as the Sun crosses the celestial equator heading north. Today, the Sun rises due east and sets due west, great for urban photo ops.
March 27 โ Moon and a Planetary Triangle
The waning crescent Moon appears to the west of Venus and Mars, with Venus about 2ยฐ above Saturn. The view will be better the next morning, March 28, with the thin Moon directly below the close pairing of Venus and Saturn. But the Moon will be even lower in the sky, making it more difficult to sight.
April
Mercury puts on its best evening show of 2022, near the Pleiades, and with a possible comet nearby. The month ends with a very close conjunction of Venus and Jupiter at dawn.ย
This is a 160ยฐ-wide panorama of the Milky Way arching over the Badlands formations at Dinosaur Provincial Park, Alberta, taken on a moonlit night in May.
April 1 โ Milky Way Arch Season Opens
With the Moon out of view, the next two weeks bring good nights to shoot panoramas of the bright summer Milky Way as an arch across the sky, with the galactic core in view to the south. Catching the arch takes a very late-night shoot in early April. But the Milky Way moves into prime position two hours earlier each month.
April 5 โ Mars and Saturn 1/2ยฐ apart
The two planets appear almost the same brightness as a close โdouble starโ in the dawn, not far from brighter Venus. Mars and Saturn will also be close the morning before, on April 4.
April 27 โ Moon Joins Venus and Jupiter
Jupiter is now emerging from behind the Sun to meet up with Venus, for a grouping of the skyโs two brightest planets. On this morning the waning Moon appears 4.5ยฐ below the pair.
April 29 โ Mercury Appears Beside the Pleiades
Just as Mercury reaches its greatest angle away from the Sun for its best evening appearance of 2022, it also appears just 1ยฐ away from the famous Pleiades star cluster low in the west.
April 30 โ Venus and Jupiter in Close Conjunction
This is an early morning sight well worth getting up for! Venus passes only 1/3ยฐ below Jupiter this morning, but low in the eastern dawn sky. They will be almost as close on May 1.
April 30 โ A Bonus Comet?
Comet PanSTARRS (C/2021 O3) might become bright enough to be a binocular object, and a photogenic target, right next to the Pleiades and Mercury pairing. Maybe! Some predictions suggest this comet could fizzle and break up earlier in April. Even if the comet survives and performs, youโll need a very clear sky to the northwest to catch this rare sight.ย
May
On May 15-16 a totally eclipsed Moon shines red in the south at midnight for eastern North America, and in the southeast after sunset from the west.
May 15-16 โ Total Eclipse of the Moon
The first of two total lunar eclipses in 2022 can be seen in its entirety from eastern North America, with totality beginning at 11:30 p.m. EDT on May 15 and lasting 85 minutes until 12:55 a.m. EDT. At mid-eclipse just after midnight from eastern North America the Moon will appear nearly due south, with the summer Milky Way to the east, shining brightly as the sky darkens during totality. Travel to a dark site to see and shoot the Moon and Milky Way.
Those in western North America see the totally eclipsed Moon rising into the southeast with some portion of the eclipse in progress, as depicted above. Once the sky darkens, the reddened Moon should become visible. Over a suitable landscape this should be a photogenic scene, though with the core of the Milky Way not yet risen. But a Milky Way arch panorama with a red Moon at one end will be possible. Choose your scenic site well!ย
Courtesy Fred Espenak/EclipseWise.com
See Fred Espenakโs EclipseWise.com page for details on timing and viewing regions. The dark region on this map does not see any of this eclipse.
May 18 โ Red Planet Meets Blue Planet
Mars passes just 1/2ยฐ south of Neptune this morning, though both planets are very low in the east. They will appear close enough to frame in a telescope (the red circle is 1ยฐ wide).ย
May 24 โ Moon with Mars and Jupiter
As it does every month in early 2022, the waning crescent Moon joins the morning planets, on this day grouping with Mars and Jupiter before dawn.
May 27 โ Moon with Venus, plus Mars and Jupiter Close
Later that week the thinner waning Moon passes 4ยฐ below bright Venus, still shining at magnitude -4. But higher up Mars and Jupiter are reaching a close conjunction, passing about 1/2ยฐ apart on May 28 and May 29. Mars is still a dim magnitude +0.7; Jupiter is at -2.2.
June
Noctilucent cloud season begins for northerners, as does prime Milky Way core season for southerners. But the unusual sight is the line of all five naked eye planets, and in order!ย
The northern summer Milky Way over Middle Waterton Lake at Driftwood Beach in Waterton Lakes National Park, Alberta on a July night.
June 1 on โ Milky Way Core Season at its Prime
In early June with no Moon to interfere, and monthly for the next four months, the Milky Way core is ideally placed to the south through the night for nightscapes. However, for those at more northern latitudes the sky in June doesnโt get dark enough to make deep Milky Way shots feasible.
The brightest section of the massive “grand display” of noctilucent clouds at dusk on June 16, 2021.
June 1 on โ Noctilucent Cloud Season Begins
Instead, northerners are rewarded by the occasional sight of noctilucent clouds to the north through June and well into July (even into August for sub-arctic latitudes). The Sun illuminates these high-altitude electric-blue clouds during the weeks around the summer solstice. However, there is no predicting on what night a good display will appear.ย
June 14 โ First of the Summer Supermoons
The Moon is full on the night of June 14-15, when it also reaches one of its closest perigees (closest approach to Earth) of 2022. In modern parlance, that makes it a โsupermoon.โ It will look impressive shining low in the south all night, with the low-altitude โMoon illusionโ making it appear even larger. It is a good night for nightscapes with the Moon, though exposures are a challenge โ try blending short exposures for the lunar disk with long exposures for the sky and ground.
June 21 โ Solstice at 5:14 a.m. EDT
Summer officially begins for the northern hemisphere, winter for the southern, as the Sun reaches its most northerly position above the celestial equator. The Sun rises farthest to the northeast and sets farthest to the northwest, and the length of daylight is at its maximum.
June 24 โ All Planets in a Row
As fast-moving Mercury rises into view at dawn in mid-June, it completes the set to provide the rare chance to see all five naked eye planets โ Mercury, Venus, Mars, Jupiter and Saturn โ in a row along the ecliptic, the path of the planets. Even more fun, they are in the correct order out from the Sun! The scene shown here depicts the morning of June 24, when the Moon sits between Venus and Mars, just where it should be in order of distance from the Sun as well.
A panorama of several stitched images will be best for capturing the scene which spans 120ยฐ. Uranus and Neptune are there, too, though not in order and faint enough (below naked eye brightness) they will be tough to capture in a wide-angle scene. Long exposures with a tracker might do the job! But by the time Mercury rises high enough, the sky might be getting too bright to nab the faintest planets.
June 26 โ Inner World Gathering
The select club of just inner worlds gathers for a meeting this morning, with the waning crescent Moon 2.5ยฐ above Venus. The rising stars of Taurus serve as a fine backdrop in the dawn twilight.
July
Once the pesky full supermoon gets out of the way, the heart of Milky Way season will be infull swing. ย
July 13 โ Second of the Summer Supermoons
It will be a battle of summer supermoons in 2022! But Julyโs Moon wins on a technicality, as it is ever so slightly closer (by about 200 km) than the June Moon. It also appears slightly farther south, so lower in the sky than a month before. This is a good night for lunar (looney?) photo ops, though donโt expect to see the Milky Way as shown here โ moonlight will wash it out.
July 26 โ Dawn Moon and Morning Star
Another photo op comes on July 26 when the waning crescent Moon passes 3ยฐ above Venus, still bright at magnitude -3.8. The last week of July and the first week of August are prime weeks for shooting the Milky Way core to the south over scenic nightscapes, assuming we get clear skies free of forest fire smoke.
August
The popular Perseid meteors are mooned out, but late in the month under dark skies, the Milky Way reigns supreme.ย
August 1 โ Red Planet Meets Green Planet
As it did in May, Mars meets up with an outer planet, passing close enough to Uranus this night for both to appear in a low-power telescope field (the red circle is 2ยฐ wide). ย
August 12-13 โ Perseid Meteor Shower Peaks
The annual and popular Perseid meteor shower peaks tonight, but with a nearly Full Moon in Aquarius (as shown above) lighting the sky all night. Under a transparent sky, youโll still see some bright meteors radiating from Perseus in the northeast. But youโll need to be patient, as bright meteors are infrequent. But why not enjoy a moonlit summer night under the stars anyway?
August 14-15 โ Saturn at Opposition
Saturn is at its closest and brightest for 2022 tonight, rising at sunset and shining due south in eastern Capricornus in the middle of the night. Through a telescope the rings appear tipped at an angle of 13ยฐ, about half the maximum possible at Saturnian solstices. The northern face of the rings is tipped toward us.
August 16 on โ Prime Milky Way Season
After it spoils the Perseids, the waning gibbous Moon takes a long time to get out of the way. As it does so, mid-August brings some good nights to shoot the Milky Way to the south as the rising waning Moon to the east illuminates the landscape with warm โbronze hourโ lighting. By the last week of August, nights are finally moonless enough for an all-night dark-sky shoot.
August 25 โ Thin Moon Above Venus
Those enjoying an all-nighter under the stars on August 24 will be rewarded with the sight of the thin waning Moon and Venus rising together at dawn on August 25. They will be 5ยฐ apart in the morning twilight, against the backdrop of the winter stars rising.
September
Itโs Harvest Moon time, with this annual special Full Moon coming early before the equinox this year.ย
The G2 auroral storm of October 11/12, 2021 with the curtains exhibiting a horizontal “dunes” structure.
September 1 on โ Prime Aurora Season Begins
As in spring, some of the best weeks for sighting auroras traditionally occur around the autumn equinox. Solar activity is on the rise in 2022, heading toward an expected solar maximum in late 2024 or 2025. So we can expect some good shows this year, including some that should extend south into the northern half of the lower 48 in the U.S.ย
The full Harvest Moon rising over the Badlands of Dinosaur Provincial Park on September 20, 2021.
September 10 โ Full โHarvestโ Moon
Occurring 12 days before the equinox, this is the closest Full Moon to the equinox, making it the official Harvest Moon of 2022. With it occurring early this year, the Harvest Moon will rise well south of due east at sunset and set well south of due west at sunrise on September 11.
Sunset at the September equinox, in this case on September 22, 2021.
September 22 โ Equinox at 9:04 p.m. EDT
Autumn officially begins for the northern hemisphere, spring for the southern, as the Sun crosses the celestial equator heading south. As in March, the Sun rises due east and sets due west for photo ops on east-west aligned roads, as above.
The Zodiacal Light in the dawn sky, September 14, 2021, from home in Alberta.
September 23 โ Zodiacal Light Season Begins in the Morning
With no Moon for the next two weeks, from sites away from light pollution look to the pre-dawn sky for a faint glow of light rising out of the east before twilight brightens the morning sky. The end of October brings another moonless morning window of opportunity for the Zodiacal Light.ย
September 26-27 โ Jupiter at opposition
Jupiter, now in southern Pisces, reaches its closest and brightest for 2022 tonight, also rising at sunset and shining due south in the middle of the night. Jupiter has now moved far enough along the ecliptic to place it high in the sky for northern observers, providing us with sharper telescope views than weโve had for many years.
October
Mercury rises into the dawn, while the Moon occults the planet Uranus.ย
October 8 โ Mercury at Its Morning Best
This is the best time to sight Mercury in the morning, as it reaches its greatest angle away from the Sun today, while the steep angle of the ecliptic on autumn mornings swings the inner planet up as high and clear from horizon haze it can get for the year.
October 11 โ Moon Hides Uranus
While many observers might not have seen Uranus, hereโs a chance to see it, then not see it! The waning gibbous Moon passes in front of magnitude 5.7 Uranus this night, occulting the planet for about an hour around midnight. Exact times will vary with location. Seeing the planet reappear from behind the dark limb of the Moon, as shown here, will be the easiest sighting, but a telescope will be essential.
October 21 โ Orionid Meteor Shower Peaks
With both the Perseids and Geminids mooned out this year, the weaker but reliable Orionids remain as perhaps the best meteor shower of 2022. The meteors (expect only about 10 per hour) all appear to radiate from northern Orion, which doesnโt rise until just before midnight.ย Mars shines bright above the radiant point.
October 25 โ Partial Solar Eclipse for Europe
While my list is aimed at North American stargazers, I should mention the partial eclipse of the Sun (there are no total solar eclipses this year) that observers across parts of Asia, Africa, Europe and the U.K. (as shown above) can see.
Courtesy Fred Espenak/EclipseWise.com
At maximum eclipse from Siberia about 86% of the Sunโs disk will be covered. No part of the eclipse is visible from North America. For details, see the page at EclipseWise.com.ย
October 30 โ Mars Begins Retrograde Motion
Mars stops its eastward motion this night and begins to retrograde westward for the next two months centred on the date of opposition, December 7. It then stops retrograding and resumes its prograde motion on January 12, 2023. Naked-eye Mars watchers can follow the changing position of Mars easily, using the stars of Taurus, including yellowish Aldebaran below, as a guide.
November
The second total lunar eclipse of 2022 brings a red Moon to the skies over western North America.ย
November 8 โ Total Eclipse of the Moon
In a mirror-image of the May eclipse, this eclipse also lasts 85 minutes, but can be seen best from western North America. From the east, the Moon sets at dawn with some portion of the eclipse in progress.
But from the west the Moon is fully eclipsed during the wee hours of November 8, with the Moon sitting west of the winter Milky Way, making for good wide-angle photos.
The Moon sits just a degree west of Uranus during totality. From Asia the eclipsed Moon actually passes in front of the planet for a rare eclipse and occultation combination. We have to be content with seeing the green planet east of the reddened Moon. A telescope with 600mm focal length should nicely frame the pairing.
The total phase of the eclipse begins at 5:16 a.m. EST (3:16 a.m. MST) and ends at 6:41 a.m. EST (4:41 a.m. MST).
Courtesy Fred Espenak/EclipseWise.com
For details see Fred Espenakโs EclipseWise site. As above, the dark region on this map does not see any of this lunar eclipse.
November 17 โ Leonid Meteor Shower Peaks
As with the Orionids, this is normally a weak shower, but this year we have to be content with watching the weak showers. The waxing crescent Moon shining below Leo (as shown above) shouldnโt hinder observations of the Leonids too much. But with Leo not rising until late, this is another shower that requires a long, late night to observe.ย
December
Mars reaches its closest point to Earth since October 2020, with the Moon occulting Mars on peak night.ย
December 1 โ Mars at Its Closest
Mars is closest to Earth this night, at 81 million kilometres away. This is not as close as it was in October 2020 when it was 62 million km away. Its disk then appeared large, at 22.5 arc seconds across. Maximum size on this night is 17.2 arc seconds, still good enough for fine telescope views.
Take the opportunity on every clear night to view Mars, as this is as good as we will see the planet until the early 2030s. As it happens, the most interesting side of Mars, featuring the prominent dark Syrtis Major region and bright Hellas basin (shown above in a simulated telescope view), faces us in North America on closest approach night.ย
Wide-angle views and photos will also be impressive, with reddish Mars shining brightly at magnitude -1.8 in Taurus with its photogenic star clusters, and near the winter Milky Way.ย
December 7/8 โ Mars at Opposition
This is the night Mars is officially at opposition, meaning it lies directly opposite the Sun and shines at its brightest. As it rises at sunset and into the early evening (as above), it is accompanied by the Full Moon, also at opposition this night, as all Full Moons are.ย
By midnight (above), the Moon and Mars lie due south high in the sky. If you can keep warm and keep an eye on Mars over this long night of opposition, youโll see surface features on Mars change as the planet rotates, bring new areas into view, with the fork-shaped Sinus Meridiani region rotating into view as triangular Syrtis Major rotates out of sight.
December 7 โ Moon Occults Mars
This is very rare! On opposition night, not only does the Full Moon appear close to Mars, it actually passes in front of it during the early evening for North America. The occultation lasts about an hour, and exact times will vary with location. Binoculars will show the event, as will even the naked eye. But the best view will be through a telescope (as above), where you will be able to see the edge of the Moon cover Mars over about half a minute. Ditto on the reappearance. This is an event worth traveling to seek out clear skies if needed.ย
December 13-14 โ Geminid Meteor Shower Peaks
The most prolific meteor shower of the year peaks with a waning gibbous Moon rising about 10 p.m. local time (as above), lighting the sky for the rest of the night. But the early evening is dark, and with Gemini just rising we might see some long Earth-grazing fireballs from the Geminids.ย So certainly worth a watch on a cold December night.
December 21 โ Solstice at 4:48 p.m. EST
Winter officially begins for the northern hemisphere, summer for the southern, as the Sun reaches its most southerly position below the celestial equator. The Sun rises farthest to the southeast and sets farthest to the southwest, and the length of daylight is at its minimum.
December 24 โ Inner Planets at Dusk
On Christmas Eve the waxing crescent Moon joins Mercury and Venus low in the southwest evening twilight. Mercury is three days past its greatest elongation, so is easier to see than usual, though it will be three and a half magnitudes fainter than magnitude -3.9 Venus.
December 28 โ Mercury and Venus in Conjunction
This evening, descending Mercury passes 1.5ยฐ above Venus, now ascending into the evening twilight sky. Venus is just beginning what will be a spectacular evening appearance for early 2023, featuring close conjunctions with Saturn (on January 22, 2023) and Jupiter (on March 1, 2023).ย
On the night of November 18/19 eclipse fans across North America can enjoy the sight of the Moon turning deep red. Hereโs how to capture the scene.
Seeing and shooting this eclipse will demand staying up late or getting up very early. Thatโs the price to pay for an eclipse everyone on the continent can see.
Also, this is not a total eclipse of the Moon. But itโs the next best thing, a 97% partial eclipse โ almost total! So the main attraction โ a red Moon โ will still be front and centre.
CLICK ON AN IMAGE to bring it up full screen for closer inspection.
NOT QUITE TOTAL
At mid-eclipse 97% of the disk of the Full Moon will be within Earthโs dark umbral shadow, and should appear a bright red colour to the eye and even more so to the camera. A sliver of the southern edge of the Moon will remain outside the umbra and will appear bright white, like a southern polar cap on the Moon.
While some references will say the eclipse begins at 1:01 am EST, thatโs when the Moon first enters the outer lighter penumbral shadow. Nothing unusual can be seen at that point, as the darkening of the Moonโs disk by the penumbra is so slight, you wonโt notice any difference over the normally bright Full Moon.
The extent of the umbra and penumbra at the October 2004 total lunar eclipse.
It isnโt until the Moon begins to enter the umbra that you can see a dark bite being taken out of the edge of the Moon.
WHAT TO SEE
At mid-eclipse the Full Moon will look deep red or perhaps bright orange โ the colours can vary from eclipse to eclipse, depending on the clarity of the Earthโs atmosphere through which the sunlight is passing to light the Moon. The red is the colour of all the sunsets and sunrises going on around the Earth during the eclipse.
The total lunar eclipse of August 2007. At the November 18 eclipse the bottom edge of the Moon, as it did here, will be bright, but brighter than it appears here.
The unique aspect of this eclipse is that for the 15 to 30 minutes around mid-eclipse we might see some unusual colour gradations at the edge of the umbral shadow, from sunlight passing through Earthโs upper atmosphere and ozone layer. This can tint the shadow edge blue or even green.
The last lunar eclipse six months ago on the morning of May 26, 2021 (see my blog here) was visible during its total phase only from western North America, and then only just. However, this eclipse can be seen from coast to coast.
Only from the very easternmost points in North America does the Moon set with the eclipse in progress, but during the inconsequential penumbral phase. All of the umbral phase is visible from the Eastern Seaboard, though the last stages will be in progress with the Moon low in the west in the pre-dawn hours. But that positioning can make for photogenic sight.
The start, middle and end times of the umbral eclipse for Eastern and Pacific time zones. The background image is a simulation of the path of the November 18/19, 2021 eclipse when the Moon travels through the southern part of the umbra.
WHEN IS THE ECLIPSE?
The show really begins when the Moon begins to enter the umbra at 2:18 am EST (1:18 am CST, 12:18 am MST, 11:18 pm PST).
But note,these times are for the night of November 18/19. If you go out on the evening of November 19 expecting to see the eclipse, youโll be sadly disappointed as you will have missed it. Itโs the night before!
The eclipse effectively ends at 5:47 am EST (4:47 am CST, 3:47 am MST, 2:47 am PST) when the Moon leaves the umbra. That makes the eclipse 3 1/2 hours long, though the most photogenic part will be for the 15 to 30 minutes centred on mid-eclipse at 4:03 am EST (3:03 am CST, 2:03 am MST, 1:03 am PST).
The sky at mid-eclipse from my home on Alberta, Canada (51ยฐ N)
WHERE WILL THE MOON BE?
The post-midnight timing places the Moon at mid-eclipse high in the south to southwest for most of North America, just west (right) of the winter Milky Way and below the distinctive Pleiades star cluster.
The view from the West Coast.
The high altitude of the Moon (some 60ยบ to 70ยบ above the horizon) puts it well above haze and murk low in the sky, but makes it a challenge to capture in a frame that includes the landscape below for an eclipse nightscape.
ASTRONOMY 101: The high altitude of the Moon is a function of both the eclipse timing in the middle of the night and its place on the ecliptic. The Full Moon is always 180ยฐ away from the Sun. So it sits where the Sun was six months earlier, in this case back in May, when the high Sun was bringing us warmer and longer days. Winter lunar eclipses are always high; summer lunar eclipses are always low, the opposite of what the Sun does.
The view from the East Coast.
From eastern North America the Moon appears lower in the west at mid-eclipse, making it easier to frame above a landscape. For example from Boston the Moon is 30ยบ up, lending itself to nightscape scenes.
However, the sky will still be dark. To make use of the darkness to capture scenes which include the Milky Way, I suggest making the effort to travel away from urban light pollution to a dark sky site. That applies to all locations. Yes, that means a very long night!
PHOTO OPTIONS 1 โ CAMERA ON A FIXED TRIPOD
With just a camera on a tripod, if you are on the East Coast (I show Boston here) it will be possible to frame the eclipsed Moon above a landscape with a 24mm lens (assuming a full frame camera; a cropped frame camera will require a 16mm lens).
Framing the scene from the East Coast.
What exposure will be best will depend on the level of local light pollution at your site. But from a dark site, 30 seconds at ISO 1600 and f/2.8 should work well. But without tracking, you will see some star trailing at 30 seconds. Also try shorter exposures at a higher ISO.
Thereโs lots of time, so take lots of shots. Include some short shots of just the Moon to blend in later, as the exposures best for picking up the Milky Way will still overexpose the Moon, even when it is darkest at mid-eclipse.
Framing the scene from the West.
From western North America, including the landscape below will require wide lenses and a vertical format, with the Moon appearing quite small. But from a photogenic site, it might be worth the effort.
Total eclipse of the Moon, December 20/21, 2010, taken from home with 15mm lens at f/3.2 and Canon 5D MkII at ISO 1600 for 1 minute single exposure, toward the end of totality.
Total eclipse of the Moon, December 20/21, 2010, taken from home with Canon 5D MKII and 24mm lens at f2.8 for stack of 4 x 2 minutes at ISO 800. Taken during totality..
However, as my images above from the December 2010 eclipse show, if thereโs any haze, the Moon could turn into a reddish blob.
You might be tempted to shoot with a long telephoto lens, but unless the camera is on a tracker, as below, the result will likely be a blurry mess. The sky moves enough during the long (over 1 second) exposures needed to pick up the reddened portion of the Moon that the image will smear when shot with long focal lengths. The solution is to use a sky tracker.
PHOTO OPTIONS 2 โ CAMERA ON A TRACKER
Placing the camera on a motorized tracker that has been polar aligned to follow the motion of the stars opens up many more possibilities.
Camera on a Star Adventurer tracker showing the field of a 24mm lens.
From a dark site, make use of the Moonโs position near the Milky Way to frame it and Orion and his fellow winter constellations. A 24mm lens will do the job nicely, in exposures up to 2 to 4 minutes long. But take short ones for just the Moon to layer in later.
Showing the field of a 50mm lens.
A 50mm lens (again assuming a full frame camera) frames the Moon with the Pleiades and Hyades star clusters in Taurus.
Showing the field of an 85mm lens,
Switching to an 85mm lens frames the clusters more tightly and makes the Moonโs disk a little larger. For me, this is the best shot to go for at this eclipse, as it tells the story of the eclipse and its unique position near the two star clusters.
Showing the field of 200mm and 250mm lenses.
But going with a longer lens allows framing the red eclipsed Moon below the blue Pleiades cluster, a fine colour contrast. A 200mm lens will do the job nicely (or a 135mm on a cropped frame camera).
Or, as I show here, the popular William Optics RedCat with its 250mm focal length will also work well. But such a lens must be on a polar-aligned tracker to get sharp shots. Use the Sidereal rate drive speed to ensure the sharpest stars over the 1 to 4 minutes needed to record lots of stars.
Typical settings for tracker images, with an image of the January 2019 eclipse.
Take lots of exposures over a range of settings โ long to bring out the deep sky detail and shorter to preserve detail in the reddened lunar disk. These can be layered and blended later in Photoshop, or in the layer-based image editing program of your choice, such as Affinity Photo or ON1 Photo RAW.
PHOTO OPTIONS 3 โ THROUGH A TELESCOPE
While I think the tracked wide-field options are some of the best for this eclipse, many photographers will want frame-filling close-ups of the red Moon. While a telescope will do the job, unless it has motors to track the sky, your options are limited.
Phone on a simple Dobsonian reflector.
A phone clamped to the eyepiece of a telescope can capture the shrinking bright part of the eclipsed Moon as the Moon enters more deeply into the umbra. Exposures for the bright part of the Moon are short enough a motor drive on the telescope is not essential.
But if you havenโt shot the Moon with this gear before, eclipse night is not the time to learn. Practice on the Moon before the eclipse.
DSLR on a beginner refractor telescope showing the adapter.
For shooting with a DSLR camera through a telescope youโll need a special camera adapter nosepiece and T-ring for your camera. Again, if you donโt have the gear and the experience doing this, I would suggest not making the attempt at two in the morning on eclipse night!
DSLR on a beginner reflector with an often necessary Barlow lens.
For example, owners of typical beginner reflectors are often surprised to find their cameras wonโt even reach focus on their telescope. Many are simply not designed for photography. Adding a Barlow lens is required for the camera to reach focus, though without a drive, exposures will be limited to short (under 1/15s) shots of the bright part of the Moon.
An exposure composite of short and long exposures.
The challenge with this and all lunar eclipses is that the Moon presents a huge range of brightness. Short snapshots can capture the bright part of the Moon not in the umbra, but the dark umbral-shaded portion requires much longer exposures, usually over one second.
Your eye can see the whole scene (as depicted above) but the camera cannot, not in one exposure. This example is a โhigh dynamic rangeโ blend of several exposures.
A series of the September 27, 2015 total lunar eclipse to demonstrate an exposure sequence from partial to total phase.
Plus as the eclipse progresses, longer and longer exposures are needed to capture the sequence as the Moon is engulfed by more of the umbra.
After mid-eclipse, the exposures must get progressively shorter again in reverse order. So attempting to capture an entire sequence requires a lot of exposure adjustments.
TIP: Bracket a lot! Take lots of frames at each burst of images shot every minute, or however often you wish to capture the progress of the eclipse for a final set. Unlike total solar eclipses, lunar eclipses provide lots of time to take lots of images.
PHOTO OPTIONS 4 โ THROUGH A TRACKING TELESCOPE
If you want close-ups of the eclipsed red Moon, you will need to use a mount equipped with a tracking motor, such as an equatorial mount shown here. But for use with telephoto lenses and short telescopes, a polar-aligned sky tracker, as above, will work.
A small apo refractor on an equatorial mount with typical settings for mid-eclipse.
Exposures can now be several seconds long, and at a lower ISO speed for less noise, allowing the Moon to be captured in sharp detail and with great colour. Long exposures will even pick up stars near the Moon.
However, when shooting close-ups, use the Lunar drive rate (if your mount offers that choice) to follow the Moon itself, as it has a motion of its own against the background stars. Itโs that orbital motion that takes it from west to east (right to left) through the Earthโs shadow.
The fields of view and size of the Moon’s disk with typical telescope focal lengths.
Filling the camera frame with the Moon requires a surprising amount of focal length. The Moon appears big to our eyes, but is only 1/2ยบ across.
Even with 800mm of focal length, the Moon fills only a third of a full frame camera field. Using a cropped frame camera has the advantage of tightening the field of view, but it still takes 1200mm to 1500mm of focal length to fill the frame.
But I wouldnโt worry about doing so, as longer focal lengths typically also come with slower f-ratios, requiring longer exposure times or higher ISOs, both of which can blur detail.
A camera on an alt-azimuth GoTo Schmidt-Cassegrain.
For close-ups, a polar-aligned equatorial mount is best. But if your telescope is a GoTo telescope on an alt-azimuth mount (such as a Schmidt-Cassegrain shown here), you should be able to get good shots.
The field of view will slowly rotate during the eclipse, making it more difficult to later accurately assemble a series of shots documenting the entire sequence.
But any one shot should be fine, though it might be best to keep exposures shorter by using a higher ISO speed. As always, take lots of shots at different settings.
You wonโt be able to tell which is sharpest until you inspect them later at the computer.
TIP: People worry about exposures, but the flaw that ruins many eclipse shots is poor focus. Use Live View to focus carefully on the sharp edge of the bright part of the Moon. Or better yet, focus on a bright star nearby. Zoom up to 10x to make it easier to see when the star is in sharpest focus. It can be a good idea to refocus through the night as the changing temperature can shift the focus point of long lenses and telescopes. That might take moving the scope over to a bright star, which wonโt be possible if you need to preserve the framing for a composite.
PHOTO OPTIONS 5 โ HDR COMPOSITES
Using an equatorial mount tracking at the lunar rate keeps the Moon stationary. This opens up the possibility of taking a series of shots over the wide range of exposures needed to capture the Moon from bright to dark, to assemble later in processing. Take 5 to 7 shots in quick succession.
An HDR composite from the December 2010 eclipse.
High dynamic range software can blend the images, or use luminosity masks created by extension panels for Photoshop such as Lumenzia, TK8 or Raya Pro. Either technique can create a final image that looks like what your eye saw. The key is making sure all the images are aligned. HDR software likely won’t align them for you very well.
The January 2019 eclipse layered and blended in Photoshop.
Blending multiple exposures will also be needed to properly capture the eclipsed Moon below the Pleiades, similar to what I show here (and below) from the January 2019 eclipse when the Moon appeared near the Beehive star cluster.
PHOTO OPTIONS 6 โ ECLIPSE TRACK COMPOSITES
Another popular form of eclipse image (though also one rife for laughably inaccurate fakes) is capturing the entire path of the Moon across the sky over the duration of the eclipse from start to end.
The track of the September 2015 eclipse, accurately assembled to correct scale.
It can be done with a fixed camera on a tripod but requires a wide (14mm to 20mm) and properly framed lens, to capture the sequence as it actually appeared to proper scale, and not created by just pasting over-sized moons onto a sky to โsimulateโ the scene, usually badly. By the end of the day on November 19 the internet will be filled with such ugly fakes.
You could set the camera at one exposure setting (one best for when the Moon and sky are darkest at mid-eclipse) and let the camera run, shooting frames every 5 seconds or so. The result might work well as a time-lapse sequence, showing the bright sky darkening, then brightening again.
But chances are the frames taken at the start and end when the sky is lit by full moonlight will be blown out. It will still take some manual camera adjustments through the eclipse.
For a still-image composite, you should instead expose properly for the Moonโs disk at all times, a setting that will change every few minutes, then take a long exposure at mid-eclipse to pick up the stars and Milky Way. The short Moon shots are then blended into the base-layer sky image later in processing.
Framing the eclipse path for the start of the sequence. Framing the path so the Moon ends up at a desired location on the frame.
If the camera has been well-framed and was not moved over the 3.5 hours of the eclipse, the result is an accurate and authentic record of the Moonโs path and passage into the shadow, and not a faked atrocity!
But creating a real image requires a lot of work at the camera, and at the computer.
TIP: Shooting for composites is not work I would recommend attempting while also running other cameras. Focus on one type of image and get it right, rather than trying to do too many and doing them all poorly.
PHOTO OPTION 7 โ ECLIPSE SHADOW COMPOSITE
One of the most striking types of lunar eclipse images is a close-up composite showing the Moon passing through the Earthโs umbral shadow, with the arc of the shadow edge on the Moon defining the extent of the shadow, which is about three times larger than the Moon.
Such a composite can be re-created later by placing individual exposures accurately on a wider canvas, using screen shots from planetarium software as a template guide.
A composite of the Moon moving through the umbra.
But to create an image that is more accurate, it is possible to do it โin camera.โ Unlike in the film days, we donโt have to do it with multiple exposures onto one piece of film.
We take lots of separate frames with a telescope or lens wide enough to contain the entire path of the Moon through the umbra. A polar-aligned equatorial mount tracking at the sidereal rate is essential. That way the scope follows the stars, not the Moon, and so the Moon travels across the frame from right to left.
Framing for a shadow composite.
Start such a sequence with the Moon at lower right if you are framing just the path through the shadow. Use planetarium software (I used Starry Nightโข to create the star charts for this blog) to plan the framing for your camera, lens and site, so the Moon ends up in the middle of the frame at mid-eclipse. This is not a technique for the faint of heart!
A shadow-defining composite from January 2019, with the Moon near the Beehive cluster.
An interesting variation would be using a 200mm to 250mm lens to frame the Moonโs shadow passage below the Pleiades, to create an image as above. That will be unique. Again, an accurately aligned tracker turning at the sidereal rate will be essential.
Acquiring the frames for any composite takes constantly adjusting the exposure during the length of eclipse, which can try your patience and gear during the wee hours of the morning.
Iโll be happy just to get a good set of images at mid-eclipse to make a single composite of the red Moon below the Pleiades.
TIP: It could be cold and lenses can frost over. A battery-powered heater coil on the optics might be essential. And spare warm batteries.
The 4-day-old waxing crescent Moon on April 8, 2019 in a blend of 7 exposures from 1/30 second to 2 seconds, blended with luminosity masks in Photoshop.
PRACTICE!
To test your equipment and your skills at focusing, you can use the waning crescent Moon in the dawn hours on the mornings of October 29 to November 2 or, after New Moon on November 4, the waxing crescent Moon on the evenings of November 6 to 10. While the crescent Moon isnโt as bright as the Full Moon, it will be a good stand in for the bright part of the eclipsed Moon when it is deep in the umbra.ย
Even better, the dark part of the crescent Moon lit by Earthshine is a good stand-in for the part of the Moon in the umbra. Like the eclipsed Moon, the crescent Moonโs bright and dark parts canโt be captured in one exposure. So itโs a good test for the range of exposures youโll need for the eclipse, for practising changing settings on your camera, and for checking your tracking system.
The crescent Moon is also useful to test your manual focusing, though the sharp detail along the terminator (the line dividing the bright crescent from the earthlit dark part of the Moon) is much easier to focus on than the flat, low contrast Full Moon.
A selfie of me looking up at the total eclipse of the Moon on January 20, 2019, using binoculars to enjoy the view.
DONโT FORGET TO LOOK!
Amid all the effort needed to shoot this or any eclipse, lunar or solar, donโt forget to just look at it. No photo can ever quite capture the glowing nature of the eclipsed Moon set against the stars.
A selfie of the successful eclipse chaser bagging his trophy, the total lunar eclipse of January 20, 2019.
I wish you clear skies and good luck with your lunar eclipse photography. If you miss it, we have two more visible from North America next year, both total eclipses, on May 15/16 and November 8, 2022.
In an extensive technical blog, I put the Canon R6 mirrorless camera through its paces for the demands of astrophotography.
Every major camera manufacturer, with the lone exception of stalwart Pentax, has moved from producing digital lens reflex (DSLR) cameras, to digital single lens mirrorless (DSLM) cameras. The reflex mirror is gone, allowing for a more compact camera, better movie capabilities, and enhanced auto-focus functions, among other benefits.
But what about for astrophotography? I reviewed the Sony a7III and Nikon Z6 mirrorless cameras here on my blog and, except for a couple of points, found them excellent for the demands of most astrophotography.
For the last two years Iโve primarily used Canonโs astro-friendly and red-sensitive EOS Ra mirrorless, a model sadly discontinued in September 2021 after just two years on the market. I reviewed that camera in the April 2020 issue of Sky & Telescope magazine, with a quick first look here on my blog.
The superb performance of the Ra has prompted me to stay with the Canon mirrorless R system for future camera purchases. Here I test the mid-priced R6, introduced in August 2020.
NOTE: In early November 2022 Canon announced the EOS R6 MkII, which one assumes will eventually replace the original R6 once stock of that camera runs out. The MkII has a 24 Mp sensor for slightly better resolution, and offers longer battery life. But the main improvements over the R6 is to autofocus accuracy, a function of little use to astrophotographers. Only real-world testing will tell if the R6 MkII has better or worse noise levels than the R6, or has eliminated the R6’s amp glow, reported on below.
CLICK or TAP on an image to bring it up full screen for closer inspection. All images are ยฉ 2021 by Alan Dyer/AmazingSky.com. Use without permission is prohibited.
M31, the spiral galaxy in Andromeda, with the Canon R6 mirrorless camera. It is a stack of 8 x 8-minute exposures at ISO 800, blended with a stack of 8 x 2-minute exposures at ISO 400 for the core, to prevent it from overexposing too much, all with a SharpStar 76mm apo refractor at f/4.5 with its field flattener/reducer.
TL;DR SUMMARY
The Canon R6 has proven excellent for astrophotography, exhibiting better dynamic range and shadow recovery than most Canon DSLRs, due to the ISO invariant design of the R6 sensor. It is on par with the low-light performance of Nikon and Sony mirrorless cameras.
The preview image is sensitive enough to allow easy framing and focusing at night. The movie mode produces usable quality up to ISO 51,200, making 4K movies of auroras possible. Canon DSLRs cannot do this.
Marring the superb performance are annoying deficiencies in the design, and one flaw in the image quality โ an amp glow โ that particularly impacts deep-sky imaging.
R6 pros
The Canon R6 is superb for its:
Low noise, though not exceptionally so
ISO invariant sensor performance for good shadow recovery
Sensitive live view display with ultra-high ISO boost in Movie mode
Relatively low noise Movie mode with full frame 4K video
Low light auto focus and accurate manual focus assist
Good battery life
R6 cons
The Canon R6 is not so superb for its:
Design Deficiencies
Lack of a top LCD screen
Bright timer display in Bulb on the rear screen
No battery level indication when shooting
Low grade R3-style remote jack, same as on entry-level Canon DSLRs
Image Quality Flaw
Magenta edge โamp glowโ in long exposures
The Canon Ra on the left with the 28-70mm f/2 RF lens and the Canon R6 on the right with the 70-200mm f/2/8 RF lens, two superb but costly zooms for the R system cameras.
CHOOSING THE R6
Canonโs first full-frame mirrorless camera, the 30-megapixel EOS R, was introduced in late 2018 to compete with Sony. As of late-2021 the main choices in a Canon DSLM for astrophotography are either the original R, the 20-megapixel R6, the 26-megapixel Rp, or the 45-megapixel R5.
The new 24-megapixel Canon R3, while it has impressive low-noise performance, is designed primarily for high-speed sports and news photography. It is difficult to justify its $6,000 cost for astro work.
I have not tested Canonโs entry-level, but full-frame Rp. While the Rpโs image quality is likely quite good, its small battery and short lifetime on a single charge will be limiting factors for astrophotography.
Nor have I tested the higher-end R5. Friends who use the R5 for nightscape work love it, but with smaller pixels the R5 will be noisier than the R6, which lab tests at sites such as DPReview.com seem to confirm.
Meanwhile, the original EOS R, while having excellent image quality and features, is surely destined for replacement in the near future โ with a Canon EOS R Mark II? The Rโs successor might be a great astrophoto camera, but with the Ra gone, I feel the R6 is currently the prime choice from Canon, especially for nightscapes.
I tested an R6 purchased in June 2021 and updated in August with firmware v1.4. Iโll go through its performance and functions with astrophotography in mind. Iโve ignored praised R6 features such as eye tracking autofocus, in-body image stabilization, and high speed burst rates. They are of limited or no value for astrophotography.
Along the way, I also offer a selection of user tips, some of which are applicable to other cameras.
LIVE VIEW FOCUSING AND FRAMING
“Back-of-the-camera” views of the R6 in its normal Live View mode (upper left) and its highly-sensitive Movie Mode (upper right), compared to views with four other cameras. Note the Milky Way visible with the R6 in its Movie mode, similar to the Sony in Bright Monitoring mode.
The first difference you will see when using any new mirrorless camera, compared to even a high-end DSLR, is how much brighter the โLive Viewโ image is when shooting at night. DSLM cameras are always in Live View โ even the eye-level viewfinder presents a digital image supplied by the sensor.
As such, whether on the rear screen on in the viewfinder, you see an image that closely matches the photo you are about to take, because it is the image you are about to take.
To a limit. DSLMs can do only so much to simulate what a long 30-second exposure will look like. But the R6, like many DSLMs, goes a long way in providing a preview image bright enough to frame a dark scene and focus on bright stars. Turn on Exposure Simulation to brighten the live image, and open the lens as wide as possible.
The Canon R6 in its Movie Mode at ISO 204,800 and with a lens wide open.
But the R6 has a trick up its sleeve for framing nightscapes. Switch the Mode dial to Movie, and set the ISO up to 204,800 (or at night just dial in Auto ISO), and with the lens wide open and shutter on 1/8 second (as above), the preview image will brighten enough to show the Milky Way and dark foreground, albeit in a noisy image. But itโs just for aiming and framing.
This is similar to the excellent, but well-hidden Bright Monitoring mode on Sony Alphas. This high-ISO Movie mode makes it a pleasure using the R6 for nightscapes. The EOS R and Ra do not have this ability. While their live view screens are good, they are not as sensitive as the R6โs, with the R and Ra’s Movie modes able to go up to only ISO 12,800. The R5 can go up to “only” ISO 51,200 in its Movie mode, good but not quite high enough for live framing on dark nights.
Comparing Manual vs. Auto Focus results with the R6.
The R6 will also autofocus down to a claimed EV -6.5, allowing it to focus in dim light for nightscapes, a feat impossible in most cameras. In practice with the Canon RF 15-35mm lens at f/2.8, I found the R6 canโt autofocus on the actual dark landscape, but it can autofocus on bright stars and planets (provided, of course, the camera is fitted with an autofocus lens).
Autofocusing on bright stars proved very accurate. By comparison, while the Ra can autofocus on distant bright lights, it fails on bright stars or planets.
Turning on Focus Peaking makes stars turn red, yellow or blue (your choice of colours) when they are in focus, as a reassuring confirmation.
The Focus Peaking and Focus Guide menu.The R6 live view display with Focus Guide arrows on and focused on a star, Antares.
In manual focus, an additional Focus Aid overlay provides arrows that close up and turn green when in focus on a bright star or planet. Or you can zoom in by 5x or 10x to focus by eye the old way by examining the star image. I wish the R6 had a 15x or 20x magnification; 5x and 10x have long been the Canon standards. Only the Ra offered 30x for ultra-precise focusing on stars.
In all, the ease of framing and focusing will be the major improvement youโll enjoy by moving to any mirrorless, especially if your old camera is a cropped-frame Canon Rebel or T3i! But the R6 particularly excels at ease of focusing and framing.
NOISE PERFORMANCE
The key camera characteristic for astrophoto use is noise. I feel it is more important than resolution. Thereโs little point in having lots of fine detail if it is lost in a blizzard of high-ISO noise. And for astro work, we are almost always shooting at high ISOs.
Comparing the R6’s noise at increasingly higher ISO speeds on a starlit nightscape.
With just 20 megapixels, low by todayโs standards, the R6 has individual pixels, or more correctly โphotosites,โ that are each 6.6 microns in size, the โpixel pitch.โ
By comparison, the 30-megapixel R (and Ra) has a pixel pitch of 5.4 microns, the 45-megapixel R5โs pixel pitch is 4.4 microns, while the acclaimed low-light champion in the camera world, the 12-megapixel Sony a7sIII, has large 8.5-micron photosites.
The bigger the photosites (i.e. the larger the pixel pitch), the more photons each photosite can collect in a given amount of time โ and the more photons they can collect, period, before they overfill and clip highlights. More photons equals more signal, and therefore a better signal-to-noise ratio, while the greater โfull-well depthโ yields higher dynamic range.
Each generation of camera also improves the signal-to-noise ratio by suppressing noise via its sensor design and improved signal processing hardware and firmware. The R6 uses Canonโs latest DIGIC X processor shared by the companyโs other mirrorless cameras.
Comparing the R6noise with the 6D MkII and EOS Ra on a deep-sky subject, galaxies.
In noise tests comparing the R6 against the Ra and Canon 6D Mark II, all three cameras showed a similar level of noise at ISO settings from 400 up to 12,800. But the 6D Mark II performed well only when properly exposed. Both the R6 and Ra performed much better for shadow recovery in underexposed scenes.
Comparing the R6noise with with the 6D MkII and EOS Ra on a shadowed nightscape.Comparing the R6 noise with the EOS Ra on the Andromeda Galaxy at typical deep-sky ISO speeds.
In nightscapes and deep-sky images the R6 and Ra looked nearly identical at each of their ISO settings. This was surprising considering the Raโs smaller photosites, which perhaps attests to the low noise of the astronomical โaโ model.
Or it could be that the R6 isnโt as low noise as it should be for a 20 megapixel camera. But it is as good as it gets for Canon cameras, and thatโs very good indeed.
I saw no โmagic ISOโ setting where the R6 performed better than at other settings. Noise increased in proportion to the ISO speed. It proved perfectly usable up to ISO 6400, with ISO 12,800 acceptable for stills when necessary.
ISO INVARIANCY
The flaw in many Canon DSLRs, one documented in my 2017 review of the 6D Mark II, was their poor dynamic range due to the lack of an ISO invariant sensor design.
The R6, as with Canonโs other R-series cameras, has largely addressed this weakness. The sensor in the R6 appears to be nicely ISO invariant and performs as well as the Sony and Nikon cameras I have used and tested, models praised for their ISO invariant behaviour.
Where this trait shows itself to advantage is on nightscapes where the starlit foreground is often dark and underexposed. Bringing out detail in the shadows in raw files requires a lot of Shadow Recovery or increasing the Exposure slider. Images from an ISO invariant sensor can withstand the brightening โin postโ far better, with minimal noise increase or degradations such as a loss of contrast, added banding, or horrible discolourations.
Comparing the R6 for ISO Invariancy on a starlit nightscape.
To test the R6, I shot sets of images at the same shutter speed, one well-exposed at a high ISO, then several at successively lower ISOs to underexpose by 1 to 5 stops. I then brightened the underexposed images by increasing the Exposure in Camera Raw by the same 1 to 5 stops. In an ideal ISO invariant sensor, all the images should look the same.
The R6 did very well in images underexposed by up to 4 stops. Images underexposed by 5 stops started to fall apart, but Iโve seen that in Sony and Nikon images as well.
Comparing the R6 for ISO Invariancy on a moonlit nightscape.
This behaviour applies to images underexposed by using lower ISOs than what a โnormalโ exposure might require. Underexposing with lower ISOs can help maintain dynamic range and avoid highlight clipping. But with nightscapes, foregrounds can often be too dark even when shot at an ISO high enough to be suitable for the sky. Foregrounds are almost always underexposed, so good shadow recovery is essential for nightscapes, and especially time-lapses, when blending in separate longer exposures for the ground is not practical.
With its improved ISO invariant sensor, the R6 will be a fine camera for nightscape and time-lapse use, which was not true of the 6D Mark II.
Comparing R6 images underexposed in 1-stop increments by using shorter shutter speeds.Comparing R6 images underexposed in 1-stop increments by using smaller apertures.
However, to be clear, ISO invariant behaviour doesnโt help you as much if you underexpose by using too short a shutter speed or too small a lens aperture. I tested the R6 in series of images underexposed by keeping ISO the same but decreasing the shutter speed then the aperture in one-stop increments.
The underexposed images fell apart in quality much sooner, when underexposed more than 3 stops. Again, this is behaviour similar to what Iโve seen in Sonys and Nikons. For the best image quality I feel it is always a best practice to expose well at the camera. Donโt count on saving images in post.
An in-camera image fairly well exposed with an ETTR histogram.
TIP: Underexposing by using too short an exposure time is the major mistake astrophotographers make, who then wonder why their images are riddled with odd artifacts and patten noise. Always Expose to the Right (ETTR), even with ISO invariant cameras. The best way to avoid noise is to give your sensor more signal, by using longer exposures or wider apertures. Use settings that push the histogram to the right.
LONG EXPOSURE NOISE REDUCTION
All cameras will exhibit thermal noise in long exposures, especially on warm nights. This form of noise peppers the shadows with hot pixels, often brightly coloured.
This is not the same as the shot and read noise that adds graininess to high-ISO images and that noise reduction software can smooth out. This is a common misunderstanding, even among professional photographers who should know better!
Long Exposure Noise Reduction (LENR) eliminates this thermal noise by taking a โdark frameโ and subtracting it in-camera to yield a raw file free of hot pixels.
And yes, LENR does apply to raw files, another fact even many professional photographers donโt realize. It is High ISO Noise Reduction that applies only to JPGs, along with Color Space and Picture Styles.
Comparing a dark nightscape without and with LENR on a warm night. Hot pixels are mostly gone at right.
The LENR option on the R6 did eliminate most hot pixels, though sometimes still left, or added, a few. LENR is needed more on warm nights, and with longer exposures at higher ISOs. So the extent of thermal noise in any camera can vary a lot from shoot to shoot.
When LENR is active, the R6โs rear screen lights up with โBusy,โ which is annoyingly bright. To hide this display, the only option is to close the screen.
As with the EOS Ra, and all mirrorless cameras, the R6 has no โdark frame bufferโ that allows several exposures to be taken in quick succession even with LENR on. Canonโs full-frame DSLRs have this little-known buffer that allows 3, 4, or 5 โlight framesโ to be taken in a row before the LENR dark frame kicks in a locks up the camera on Busy.
Comparing long exposure images with the lens cap on (dark frames), to show just thermal noise. The right edge of the frame is shown, blown up, to reveal the amp glow, which LENR removes.
With all Canon R cameras, and most other DSLRs, turning on LENR forces the camera to take a dark frame after every light frame, doubling the time it takes to finish every exposure. Thatโs a price many photographers arenโt willing to pay, but on warm nights it can be necessary, and a best practice, for the reward of cleaner images.
The standard Canon Sensor Cleaning menu.
TIP: If you find hot pixels are becoming more obvious over time, try this trick: turn on the Clean Manually routine for 30 seconds to a minute. In some cameras this can remap the hot pixels so the camera can better eliminate them.
STAR QUALITY
Using LENR with the R6 did not introduce any oddities such as oddly-coloured, green or wiped-out stars. Even without LENR I saw no evidence of green stars, a flaw that plagues some Sony cameras at all times, or Nikons when using LENR.
Comparing the R6 for noise and star colours at typical deep-sky ISOs and exposure times.
Canons have always been known for their good star colours, and the R6 is no exception. According to DPReview the R6 has a low-pass anti-alias filter in front of its sensor. Cameras which lack such a sensor filter do produce sharper images, but stars that occupy only one or two pixels might not de-Bayer properly into the correct colours. Thatโs not an issue with the R6.
I also saw no โstar-eating,โ a flaw Nikons and Sonys have been accused of over the years, due to aggressive in-camera noise reduction even on raw files. Canons have always escaped charges of star-eating.
VIGNETTING/SHADOWING
DSLRs are prone to vignetting along the top and bottom of the frame from shadowing by the upraised mirror and mirror box. Not having a mirror, and a sensor not deeply recessed in the body, largely eliminates this edge vignetting in mirrorless cameras.
This illustrates the lack of edge shadows but magenta edge glows in a single Raw file boosted for contrast.
That is certainly true of the R6. Images boosted a lot in contrast, as we do with deep-sky photos, show not the slightest trace of vignetting along the top or bottom edges There were no odd clips or metal bits intruding into the light path, unlike in the Sony a7III I tested in 2018.
The full frame of the R6 can be used without need for cropping or ad hoc edge brightening in post. Except โฆ
EDGE ARTIFACTS/AMP GLOWS
The R6 did exhibit one serious and annoying flaw in long-exposure high-ISO images โ a magenta glow along the edges, especially the right edge and lower right corner.
Comparing a close-up of a nightscape, without and with LENR, to show the edge glow gone with LENR on.
Whether this is the true cause or not, it looks like โamplifier glow,โ an effect caused by heat from circuitry illuminating the sensor with infra-red light. It shows itself when images are boosted in contrast and brightness in processing. Itโs the sort of flaw revealed only when testing for the demands of astrophotography. It was present in images I took through a telescope, so it is not IR leakage from an auto-focus lens.
I saw this type of amp glow with the Sony a7III, a flaw eventually eliminated in a firmware update that, I presume, turned off unneeded electronics in long exposures.
Amp glow is something I have not seen in Canon cameras for many years. In a premium camera like the R6 it should not be there. Period. Canon needs to fix this with a firmware update.
UPDATE AUGUST 1, 2022: As of v1.6 of the R6 firmware, released in July 2022, the amp glow issue remains and has not been fixed. It may never be at this point.
It is the R6โs only serious image flaw, but itโs surprising to see it at all. Turning on LENR eliminates the amp glow, as it should, but using LENR is not always practical, such as in time-lapses and star trails.
For deep-sky photography high-ISO images are pushed to extremes of contrast, revealing any non-uniform illumination or colour. The usual practice of taking and applying calibration dark frames should also eliminate the amp glow. But Iโd rather it not be there in the first place!
RED SENSITIVITY
The R6 I bought was a stock โoff-the-shelfโ model. It is Canonโs now-discontinued EOS Ra model that is (or was) โfilter-modifiedโ to record a greater level of the deep red wavelength from red nebulas in the Milky Way. Compared to the Ra, the R6 did well, but could not record the depth of nebulosity the Ra can, to be expected for a stock camera.
Comparing the stock R6 with the filter-modified Ra on Cygnus nebulosity.
In wide-field images of the Milky Way, the R6 picked up a respectable level of red nebulosity, especially when shooting through a broadband light pollution reduction filter, and with careful processing.
Comparing the stock R6 with the filter-modified Ra on the Swan Nebula with a telescope with minimal processing to the Raw images.Comparing the stock R6 with the filter-modified Ra on the Swan Nebula with a telescope with a dual narrowband filter and with colour correction applied to the single Raw images.
However, when going after faint nebulas through a telescope, even the use of a narrowband filter did not help bring out the target. Indeed, attempting to correct the extreme colour shift introduced by such a filter resulted in a muddy mess and accentuated edge glows with the R6, but worked well with the Ra.
While the R6 could be modified by a third party, the edge amp glow might spoil images, as a filter modification can make a sensor even more sensitive to IR light, potentially flooding the image with unwanted glows.
TIP: Buying a used Canon Ra (if you can find one) might be one choice for a filter-modified mirrorless camera, one much cheaper than a full frame cooled CMOS camera such as a ZWO ASI2400MC. Or Spencerโs Camera sells modified versions of all the R series cameras with a choice of sensor filters. But I have not used any of their modded cameras.
RESOLUTION
A concern of prospective buyers is whether the R6โs relatively low 20-megapixel sensor will be sharp enough for their purposes. R6 images are 5472 by 3648 pixels, much less than the 8000+ pixel-wide images from high-resolution cameras like the Canon R5, Nikon Z7II or Sony a1.
Unless you sell your astrophotos as very large prints, Iโd say donโt worry. In comparisons with the 30-megapixel Ra I found it difficult to see a difference in resolution between the two cameras. Stars were nearly as well resolved in the R6, and only under the highest pixel-peeping magnification did stars look a bit more pixelated in the R6 than in the Ra. Faint stars were equally well recorded.
Comparing resolution of the R6 vs. Ra with a blow-up of wide-field 85mm imagesComparing resolution of the R6 vs. Ra on blow-ups of the Andromeda Galaxy with a 76mm apo refractor. The R6 is more pixellated but it takes pixel peeping to see it!
The difference between 20 and 30 megapixels is not as great as you might think for arc-second-per-pixel plate scale. I think it would take going to the R5 with its 45 megapixel sensor to provide enough of a difference in resolution over the R6 to be obvious in nightscape scenes, or when shooting small, detailed deep-sky subjects such as globular clusters.
If landscape or wildlife photography by day is your passion, with astrophotography a secondary purpose, then the more costly but highly regarded R5 might be the better choice.
Super Resolution menu in Adobe Lightroom.
TIP: Adobe now offers (in Lightroom and in Camera Raw) a Super Resolution option, that users might think (judging by the rave reviews on-line) would be the answer to adding resolution to astro images from โlow-resโ cameras like the R6.
Comparing a normal R6 image with the same image upscaled with Super Resolution.
Sorry! In my tests on astrophotos Iโve found Super Resolution results unsatisfactory. Yes, stars were less pixelated, but they became oddly coloured in the AI-driven up-scaling. Green stars appeared! The sky background also became mottled and uneven.
I would not count on such โsmart upscalingโ options to add more pixels to astro-images from the R6. Then again, I donโt think thereโs a need to.
RAW vs. cRAW
Canon now offers the option of shooting either RAW or cRAW files, the latter being the same megapixel count but compressed in file size by almost a factor of two. This allows shooting twice as many images before card space runs out, perhaps useful for shooting lots of time-lapses on extended trips away from a computer.
The R6 Image Quality menu with the cRAW Option.Comparing an R6 cRAW with a RAW image.
However, the compression is not lossless. In high-ISO test images purposely underexposed, then brightened in post, I could see a slight degradation in cRAW images โ the noise background looked less uniform and exhibited a blocky look, like JPG artifacts.
The R6’s dual SD card slots.
TIP: With two SD card slots in the R6 (the second card can be set to record either a backup of images on card one, or serve as an overflow card) and the economy of large SD cards, thereโs not the need to conserve card space as there once was. I would suggest always shooting in the full RAW format. Why accept any compression and loss of image quality?
BATTERY LIFE
The R6 uses a new version of Canonโs standard LP-E6 battery, the LP-E6NH, that supports charging through the USB-C port and has a higher 2130mAh capacity than the 1800mAh LP-E6 batteries. However, the R6 is compatible with older batteries.
On warm nights, I found the R6 ran fine on one battery for the 3 to 4 hours needed to shoot a time-lapse sequence, with power to spare. However, as noted below, the lack of a top LCD screen means thereโs no ongoing display of battery level, a deficiency for time-lapse and deep-sky work.
For demanding applications, especially in winter, the R6 can be powered by an outboard USB power bank that has โPower Deliveryโ capability. Thatโs a handy feature. Thereโs no need to install a dummy battery leading out to a specialized power source.
The R6’s Connection menu with Airplane mode to turn off battery-eating WiFi and Bluetooth.
TIP: Putting the camera into Airplane mode (to turn off WiFi and Bluetooth), turning off the viewfinder, and either switching off or closing the rear screen all helps conserve power. The R6 does not have GPS built in. Tagging images with location data requires connecting to your phone.
VIDEO USE
A major selling point for me was the R6โs low-light video capability. It replaces my Sony A7III, which had been my โgo toโ camera for real-time 4K movies of auroras.
As best I can tell (from the dimmer auroras Iโve shot to date), the R6 performs equally as well as the Sony. It is able to record good quality (i.e. acceptably noise-free) 4K movies at ISO 25,600 to ISO 51,200. While it can shoot at up to ISO 204,800, the excessive noise makes the top ISO an emergency-use only setting.
The R6’s Movie size and quality options, with 4K and Full HD formats and frame rates.
Comparing the R6 on a dim aurora at various high ISO speeds. Narrated at the camera โ excuse the wind noise! Switch to HD mode for the best video playback quality. This was shot in 4K but WordPress plays back only in HD.
The R6 can shoot at a dragged shutter speed as slow as 1/8-second โ good, though not as slow as the Sonyโs 1/4-second slowest shutter speed in movie mode. That 1/8-second shutter speed and a fast f/1.4 to f/2 lens are the keys to shooting movies of the night sky. Only when auroras get shadow-casting bright can we shoot at the normal 1/30-second shutter speed and at lower ISOs.
As with Nikons (but not Sonys), the Canon R6 saves its movie settings separately from its still settings. When switching to Movie mode you donโt have to re-adjust the ISO, for example, to set it higher than it might have been for stills, very handy for taking both stills and movies of an active aurora, where quick switching is often required.
Unlike the R and Rp, the R6 captures 4K movies from the full width of the sensor, preserving the field of view of wide-angle lenses. This is excellent for aurora shooting.
The R6’s Movie Cropping menu option
A 4K movie of the Moon in full-frame and copped-frame modes, narrated at the camera. Again, this was shot in 4K but WordPress plays back only in HD.Comparing blow-ups of frame-grabbed stills from a full-frame 4K vs. Cropped frame 4K. The latter is less pixellated.
However, the R6 offers the option of a โMovie Cropโ mode. Rather than taking the 4K movie downsampled from the entire sensor, this crop mode records from a central 1:1 sampled area of the sensor. That mode can be useful for high-magnification lunar and planetary imaging, for ensuring no loss of resolution. It worked well, producing videos with less pixelated fine details in test movies of the Moon.
Though of course I have yet to test it on one, the R6 should be excellent for movies of total solar eclipses. It can shoot 4K up to 60 frames per second in both full frame and cropped frame. It cannot shoot 6K (buy the R3!) or 8K (buy the R5!).
The R6’s Canon Log settings menu for video files.
Shooting in the R6โs Canon cLog3 profile records internally in 10-bit, preserving more dynamic range in movies, up to 12 stops. During eclipses, that will be a benefit for recording totality, with the vast range of brightness in the Sunโs corona. It should also aid in shooting auroras which can vary over a huge range in brightness.
Grading a cLog format movie in Final Cut under Camera LUT.
TIP: Processing cLog movies, which look flat out of camera, requires applying a cLog3 Look Up Table, or LUT, to the movie clips in editing, a step called โcolour grading.โ This is available from Canon, from third-party vendors or, as it was with my copy of Final Cut Pro, might be already installed in your video editing software. When shooting, turn on View Assist so the preview looks close to what the final graded movie will look like.
EXPOSURE TRACKING IN TIME-LAPSES
In one test, I shot a time-lapse from twilight to darkness with the R6 in Aperture Priority auto-exposure mode, of a fading display of noctilucent clouds. I just let the camera lengthen the shutter speed on its own. It tracked the darkening sky very well, right down to the camera’s maximum exposure time of 30 seconds, using a fish-eye lens at f/2.8. This demonstrated that the light meter in the R6 was sensitive enough to work well in dim light.
Other cameras I have used cannot do this. The meter fails at some point and the exposure stalls at 5 or 6 seconds long, resulting in most frames after that being underexposed. By contrast, the R6 showed excellent performance, negating the need for special bulb ramping intervalometers for some “holy grail” scenes. Here’s the resulting movie.
A time-lapse of 450 frames from 0.4 seconds to 30 seconds, with the R6 in Av mode. Set to 1080P for the best view! A screenshot from LRTimelapse showing the smoothness of the exposure tracking (the blue line) through the sequence,
In addition, the R6’s exposure meter tracked the darkening sky superbly, with nary a flicker or variation. Again, few cameras can do this. Nikons have an Exposure Smoothing option in their Interval Timers which works well.
The R6 has no such option but doesn’t seem to need it. The exposure did fail at the very end, when the shutter reached its maximum of 30 seconds. If I had the camera on Auto ISO, it might have started to ramp up the ISO to compensate, a test I have yet to try. Even so, this is impressive time-lapse performance in auto-exposure.
MISSING FEATURES
The R6, like the low-end Rp, lacks a top LCD screen for display of camera settings and battery level. In its place we get a traditional Mode dial, which some daytime photographers will prefer. But for astrophotography, a backlit top LCD screen provides useful information during long exposures.
The R6 top and back of camera view.
Without it, the R6 provides no indication of battery level while a shoot is in progress, for example, during a time-lapse. A top screen is also useful for checking ISO and other settings by looking down at the camera, as is usually the case when itโs on a tripod or telescope.
The lack of a top screen is an inconvenience for astrophotography. We are forced to rely on looking at the brighter rear screen for all information. It is a flip-out screen, so can be angled up for convenient viewing on a telescope.
The R6’s flip screen, similar to most other new Canon cameras.
The R6 has a remote shutter port for an external intervalometer, or control via a time-lapse motion controller. Thatโs good!
However, the port is Canonโs low-grade 2.5mm jack. It works, and is a standard connector, but is not as sturdy as the three-pronged N3-style jack used on Canonโs 5D and 6D DSLRs, and on the R3 and R5. Considering the cost of the R6, I would have expected a better, more durable port. The On/Off switch also seems a bit flimsy and easily breakable under hard use.
The R6’s side ports, including the remote shutter/intervalometer port.
These deficiencies provide the impression of Canon unnecessarily โcheaping outโ on the R6. You can forgive them with the Rp, but not with a semi-professional camera like the R6.
INTERVAL TIMER
Unlike the Canon R and Ra (which still mysteriously lack a built-in interval timer, despite firmware updates), the R6 has one in its firmware. Hurray! This can be used to set up a time-lapse sequence, but on exposures only up to the maximum of 30 seconds allowed by the cameraโs shutter speed settings, true of most in-camera intervalometers.
The Interval Timer menu page.
For 30-second exposures taken in succession as quickly as possible the interval on the R6 has to be set to 34 seconds. The reason is that the 30-second exposure is actually 32 seconds, true of all cameras. With the R6, having a minimum gap in time between shots requires an Interval not of 33 seconds as with some cameras, but 34 seconds. Until you realize this, setting the intervalometer correctly can be confusing.
Like all Canon cameras, the R6 can be set to take only up to 99 frames, not 999. That seems a dumb deficiency. Almost all time-lapse sequences require at least 200 to 300 frames. What could it possibly take in the firmware to add an extra digit to the menu box? Itโs there at in the Time-lapse Movie function that assembles a movie in camera, but not here where the camera shoots and saves individual frames. Itโs another example where you just canโt fathom Canonโs software decisions.
Setting the Interval Timer for rapid sequence shots with a 30-second exposure.
TIP: If you want to shoot 100 or more frames, set the Number of Frames to 00, so it will shoot until you tell the camera to stop. But awkwardly, Canon says the way to stop an interval shoot is to turn off the camera! Thatโs crude, as doing so can force you to refocus if you are using a Canon RF lens. Switching the Mode dial to Bulb will stop an interval shoot, an undocumented feature.
BULB TIMER
As with most recent Canon DSLRs and DSLMs, the menu also includes a Bulb Timer. This allows setting an exposure of any length (many minutes or hours) when the camera is in Bulb mode. This is handy for single long shots at night.
The Bulb Timer menu page. Bulb Timer only becomes an active choice when the camera is on Bulb.
However, it cannot be used in conjunction with the Interval Timer to program a series of multi-minute exposures, a pity. Instead, a separate outboard intervalometer has to be used for taking an automatic set of any exposures longer than 30 seconds, true of all Canons.
In Bulb and Bulb Timer mode, the R6โs rear screen lights up with a bright Timer readout. While the information is useful, the display is too bright at night and cannot be dimmed, nor turned red for night use, exactly when you are likely to use Bulb. The power-saving Eco mode has no effect on this display, precisely when you would want it to dim or turn off displays to prolong battery life, another odd deficiency in Canonโs firmware.
The Bulb Timer screen active during a Bulb exposure. At night it is bright!
The Timer display can only be turned off by closing the flip-out screen, but now the viewfinder activates with the same display. Either way, a display is on draining power during long exposures. And the Timer readout lacks any indication of battery level, a vital piece of information during long shoots. The Canon R, R3 and R5, with their top LCD screens, do not have this annoying โfeature.โ
TIP: End a Bulb Timer shoot prematurely by hitting the Shutter button. That feature is documented.
IN-CAMERA IMAGE STACKING
The R6 offers a menu option present on many recent Canon cameras: Multiple Exposure. The camera can take and internally stack up to 9 images, stacking them by using either Average (best for reducing noise) or Bright mode (best for star trails). An Additive mode also works for star trails, but stacking 9 images requires reducing the exposure of each image by 3 stops, say from ISO 1600 to ISO 200, as I did in the example below.
The Multiple Exposure menu page.
The result of the internal stacking is a raw file, with the option of also saving the component raws. While the options work very well, in all the cameras Iโve owned that offer such functions, Iโve never used them. I prefer to do any stacking needed later at the computer.
Comparing a single image with a stack of 9 exposures with 3 in-camera stacking methods.
TIP: The in-camera image stacking options are good for beginners wanting to get advanced stacking results with a minimum of processing fuss later. Use Average to stack ground images for smoother noise. Use Bright for stacking sky images for star trails. Activate one of those modes, then control the camera with a separate intervalometer to automatically shoot and internally stack several multi-minute exposures.
SHUTTER OPERATION
Being a mirrorless camera, there is no reflex mirror to introduce vibration, and so no need for a mirror lockup function. The shutter can operate purely mechanically, with physical metal curtains opening and closing to start and end the exposure.
However, the default โout of the boxโ setting is Electronic First Curtain, where the actual exposure, even when on Bulb, is initiated electronically, but ended by the mechanical shutter. Thatโs good for reducing vibration, perhaps when shooting the Moon or planets through a telescope at high magnification.
R6 Shutter Mode options.
In Mechanical, the physical curtains both start and end the exposure. Itโs the mode I usually prefer, as I like to hear the reassuring click of the shutter opening. Iโve never found shutter vibration a problem when shooting deep sky images on a telescope mount of any quality.
In Mechanical mode the shutter can fire at up to 12 frames a second, or up to 20 frames a second in Electronic mode where both the start and end of the exposure happen without the mechanical shutter. That makes for very quiet operation, good for weddings and golf tournaments!
Electronic Shutter Mode is for fastest burst rates but has limitations.
Being vibration free, Electronic shutter might be great during total solar eclipses for rapid-fire bursts at second and third contacts when shooting through telescopes. Maximum exposure time is 1/2 second in this mode, more than long enough for capturing fleeting diamond rings.
Longer exposures needed for the corona will require Mechanical or Electronic First Curtain shutter. Combinations of shutter modes, drive rates (single or continuous), and exposure bracketing can all be programmed into the three Custom Function settings (C1, C2 and C3) on the Mode dial, for quick switching at an eclipse. It might not be until April 8, 2024 until I have a chance to test these features. And by then the R6 Mark II will be out!
TIP: While the R6โs manual doesnโt state it, some reviews mention (including at DPReview) that when the shutter is in fully Electronic mode the R6โs image quality drops from 14-bit to 12-bit, true of most other mirrorless cameras. This reduces dynamic range. I would suggest not using Electronic shutter for most astrophotography, even for exposures under 1/2 second. For longer exposures, itโs a moot point as it cannot be used.
The menu option that fouls up all astrophotographers using an R-series camera.
TIP: The R6 has the same odd menu item that befuddles many a new R-series owner, found on Camera Settings: Page 4. โRelease Shutter w/o Lensโ defaults to OFF, which means the camera will not work if it is attached to a manual lens or telescope it cannot connect to electronically. Turn it ON and all will be solved. This is a troublesome menu option that Canon should eliminate or default to ON.
OTHER MENU FEATURES
The rear screen is fully touch sensitive, allowing all settings to be changed on-screen if desired, as well as by scrolling with the joystick and scroll wheels. I find going back to an older camera without a touchscreen annoying โ I keep tapping the screen expecting it to do something!
The Multi-Function Button brings up an array of 5 settings to adjust. This is ISO.
The little Multi-Function (M-Fn) button is a worth getting used to, as it allows quick access to a choice of five important functions such as ISO, drive mode and exposure compensation. However, the ISO, aperture and shutter speed are all changeable by the three scroll wheels.
The Q button brings up the Quick Menu for displaying and adjusting key functions.
Thereโs also the Quick menu activated by the Q button. While the content of the Quick menu screen canโt be edited, it does contain a good array of useful functions, adjustable with a few taps.
Under Custom settings, the Dials and Buttons can be re-assigned to other functions.
Unlike Sonys, the R6 has no dedicated Custom buttons per se. However, it does offer a good degree of customization of its buttons, by allowing users to re-assign them to other functions they might find more useful than the defaults. For example โฆ.
This shows the AF Point button being re-assigned to the Maximize Screen Brightness (Temporary) command.
Iโve taken the AF Point button and assigned it to the Maximize Screen Brightness function, to temporarily boost the rear screen to full brightness for ease of framing.
The AE Lock button I assigned to switch the Focus Peaking indicators on and off, to aid manual focusing when needed.
The Depth of Field Preview button I assigned to switching between the rear screen and viewfinder, through that switch does happen automatically as you put your eye to the viewfinder.
The Set button I assigned to turning off the Rear Display, though that doesnโt have any effect when the Bulb Timer readout is running, a nuisance.
While the physical buttons are not illuminated, having a touch screen makes it less necessary to access buttons in the dark. Itโs a pity the conveniently positioned but mostly unused Rate button canโt be re-programmed to more useful functions. Itโs a waste of a button.
Set up the Screen Info as you like it by turning on and off screen pages and deciding what each should show.
TIP: The shooting screens, accessed by the Info button (one you do need to find in the dark!), can be customized to show a little, a lot, or no information, as you prefer. Take the time to set them up to show just the information you need over a minimum of screen pages.
LENS AND FILTER COMPATIBILITY
The new wider RF mount accepts only Canon and third-party RF lenses. However, all Canon and third-party EF mount lenses (those made for DSLRs) will fit on RF-mount bodies with the aid of the $100 Canon EF-to-RF lens adapter.
The Canon ER-to-RF lens adapter will be needed to attach R cameras to most telescope camera adapters and Canon T-rings made for older DSLR cameras.
This adapter will be necessary to attach any Canon R camera to a telescope equipped with a standard Canon T-ring. Thatโs especially true for telescopes with field flatterers where maintaining the standard 55mm distance between the flattener and sensor is critical for optimum optical performance.
The shallower โflange distanceโ between lens and sensor in all mirrorless cameras means an additional adapter is needed not just for the mechanical connection to the new style of lens mount, but also for the correct scope-to-sensor spacing.
The extra spacing provided by a mirrorless camera has the benefit of allowing a filter drawer to be inserted into the light path. Canon offers a $300 lens adapter with slide-in filters, though the choice of filters useful for astronomy that fit Canonโs adapter is limited. AstroHutech offers a few IDAS nebula filters.
Clip-in filters made for the EOS R, such as those offered by Astronomik, will also fit the R6. Though, again, most narrowband filters will not work well with an unmodified camera.
The AstroHutech adapter allows inserting filters into the light path on telescopes.
TIP: Alternatively, AstroHutech also offers its own lens adapter/filter drawer that goes from a Canon EF mount to the RF mount, and accepts standard 52mm or 48mm filters. It is a great way to add interchangeable filters to any telescope when using an R-series camera, while maintaining the correct back-focus spacing. I use an AstroHutech drawer with my Ra, where the modified camera works very well with narrowband filters. Using such filters with a stock R6 wonโt be as worthwhile, as I showed above.
A trio of Canon RF zooms โ all superb but quite costly.
As of this writing, the selection of third-party lenses for the Canon RF mount is limited, as neither Canon or Nikon have โopened upโ their system to other lens makers, unlike Sony with their E-mount system. For example, we have yet to see much-anticipated RF-mount lenses from Sigma, Tamron and Tokina.
A trio of third party RF lenses โ L to R: the TTArtisan 7.5mm f/2 and 11mm f/2.8 fish-eyes and the Samyang/Rokinon AF 85mm f/1.4.
The few third-party lenses that are available, from TTArtisan, Venus Optics and other boutique Chinese lens companies, are usually manual focus lenses with reverse-engineered RF mounts offering no electrical contact with the camera. Some of these wide-angle lenses are quite good and affordable. (I tested the TTArtisan 11mm fish-eye here.)
Until other lens makers are โallowed in,โ if you want lenses with auto-focus and camera metadata connections, you almost have to buy Canon. Their RF lenses are superb, surpassing the quality of their older EF-mount equivalents. But they are costly. I sold off a lot of my older lenses and cameras to help pay for the new Canon glass!
Astrophotographers often like to operate their cameras at the telescope using computers running specialized control software. I tested the R6 with two popular Windows programs for controlling DSLR and now mirrorless cameras, BackyardEOS (v3.2.2) and AstroPhotographyTool (v3.88). Both recognized and connected to the R6 via its USB port.
Both programs recognized the Canon R6.
Another popular option is the ASIair WiFi controller from ZWO. It controls cameras via one of the ASIairโs USB ports, and not (confusingly) through the Airโs remote shutter jack marked DSLR. Under version 1.7 of its mobile app, the ASIair now controls Canon R cameras and connected to the R6 just fine, allowing images to be saved both to the camera and to the Airโs own MicroSD card.
With an update in 2021, the ZWOASIair now operates Canon R-series cameras.
The ASIair is an excellent solution for both camera control and autoguiding, with operation via a mobile device that is easier to use and power in the field than a laptop. Iโve not tried other hardware and software controllers with the R6.
TIP: While the R6, like many Canon cameras, can be controlled remotely with a smartphone via the CanonConnect mobile app, the connection process is complex and the connection can be unreliable. The Canon app offers no redeeming features for astrophotography, and maintaining the connection via WiFi or Bluetooth consumes battery power.
A dim red and green aurora from Dinosaur Provincial Park, Alberta, on August 29/30, 2021. This is a stack of 4 exposures for the ground to smooth noise and one exposure for the sky, all 30 seconds at f/2.8 with the Canon 15-35mm RF lens at 25mm and the Canon R6 at ISO 4000.
SUGGESTIONS TO CANON
To summarize, in firmware updates, Canon should:
Fix the low-level amp glow. No camera should have amp glow.
Allow either dimming the Timer readout, turning it red, or just turning it off!
Add a battery display to the Timer readout.
Expand the Interval Timer to allow up to 999 frames, as in the Time-Lapse Movie.
Allow the Rate button to be re-assigned to more functions.
Default the Release Shutter w/o Lens function to ON.
Revise the manual to correctly describe how to stop an Interval Timer shoot.
Allow programming multiple long exposures by combining Interval and Bulb Timer, or by expanding the shutter speed range to longer than 30 seconds, as some Nikons can do.
The Zodiacal Light in the dawn sky, September 14, 2021, from home in Alberta, with the winter sky rising. This is a stack of 4 x 30-second exposures for the ground to smooth noise, and a single 30-second exposure for the sky, all with the TTArtisan 7.5mm fish-eye lens at f/2 and on the Canon R6 at ISO 1600.
CONCLUSION
The extended red sensitivity of the Canon EOS Ra makes it better suited for deep-sky imaging. But with it now out of production (Canon traditionally never kept its astronomical โaโ cameras in production for more than two years), I think the R6 is now Canonโs best camera (mirrorless or DSLR) for all types of astrophotography, both stills and movies.
However, I cannot say how well it will work when filter-modified by a third-party. But such a modification is necessary only for recording red nebulas in the Milky Way. It is not needed for other celestial targets and forms of astrophotography.
A composite showing about three dozen Perseid meteors accumulated over 3 hours of time, compressed into one image showing the radiant point of the meteor shower in Perseus. All frames were with the Canon R6 at ISO 6400 and with the TTArtisan 11mm fish-eye lens at f/2.8.
The low noise and ISO invariant sensor of the R6 makes it superb for nightscapes, apart from the nagging amp glow. That glow will also add an annoying edge gradient to deep-sky images, best dealt with when shooting by the use of LENR or dark frames.
As the image of the Andromeda Galaxy, M31, at the top of the blog attests, with careful processing it is certainly possible to get fine deep-sky images with the R6.
For low-light movies the R6 is Canonโs answer to the Sony alphas. No other Canon camera can do night sky movies as well as the R6. For me, it was the prime feature that made the R6 the camera of choice to complement the Ra.
โ Alan, September 22, 2021 / ยฉ 2021 Alan Dyer / AmazingSky.com
Two major eclipses of the Moon and a partial eclipse of the Sun over eastern North America highlight the astronomical year of 2021.
I provide my selection of three dozen of the best sky sights for 2021. I focus on events you can actually see, and from North America. I also emphasize events with the potential for good โphoto ops.โ
What I Donโt Include
Thus, Iโm excluding minor meteor showers and ones that peak at Full Moon, and events that happen with the objects too close to the Sun.
I also donโt include events seen only from the eastern hemisphere, such as the April 17 occultation of Mars by the Moon โ it isnโt even a close conjunction for us in North America. The August 15 rare triple transit of three Galilean moons at once on the disk of Jupiter occurs during daylight hours for western North America, rendering it very challenging to see. An outburst on August 31 of the normally quiet Aurigid meteor shower is predicted to happen over Asia, not North America.
I also donโt list the growing profusion of special or โsupermoonsโ that get click-bait PR every year, choosing instead to limit my list to just the Harvest Moon of September as a notably photogenic Moon.
Good Year for Lunar Eclipses
But two Full Moons โ in May and in November โ do undergo eclipses that will be wonderful sights for the eye and camera. As a bonus, the Full Moon of May is the closest Full Moon of 2021, making it, yes, a โsupermoon.โ
The New Moon eclipses the Sun on June 10, bringing an annular eclipse to remote regions of northern Canada and the Arctic (including the North Pole!). Eastern North America and all of Europe can witness a partial solar eclipse this day.
Recommended Guides
For an authoritative annual guide to the sky and detailed reference work, see the Observerโs Handbook published each year in Canadian and U.S. editions by The Royal Astronomical Society of Canada. I used it to compile this list.
The RASC has also partnered with Firefly Books to publish a more popular-level guide to the coming yearโs sky for North America, in the 2021 Night Sky Almanac, authored by Canadian science writer Nicole Mortillaro. It provides excellent monthly star charts.
However, feel free to print out my blog or save it as a PDF for your personal reference. To share my listing with others, please send them the link to this blog page. Thanks!
January
The year begins with a chance to see three planets together at dusk.
January 10 โ Mercury, Jupiter and Saturn within 2 degrees (ยฐ)
Even three weeks after their much publicized Great Conjunction, Jupiter and Saturn are still close and visible low in the evening twilight. On January 10 Mercury joins them to form a neat triangle of worlds, but very low in the southwest. Clear skies and binoculars are a must!
NOTE: The red circle on this and most charts represents the 6.5ยฐ field of view of a typical 10×50 binocular. So you can see here how binoculars will frame the trio perfectly. All charts are courtesy the desktop app Starry Nightโข bySimulation Curriculum.
January 14 โ Thin waxing crescent Moon above line of Mercury, Jupiter and Saturn
Saturn disappears behind the Sun on January 23, followed by Jupiter on January 28, so early January is our last chance to see the evening trio of planets, tonight with the crescent Moon.
January 20 โ Mars and Uranus 1.6ยฐ apart
Uranus will be easy to spot in binoculars as a magnitude 5.8 green star below red Mars, so this is your chance to find the seventh planet. The quarter Moon shines below the planet pair.
January 23 โ Mercury at a favourable evening elongation
This and its appearance in May are the best opportunities for northern hemisphere observers to catch the innermost planet in the evening sky in 2021. Look for a bright magnitude -0.8 โstarโ in the dusk twilight.
February
This is a quiet month with Mars the main evening planet, but now quite small in the telescope.
February 18 โ Waxing Moon 4ยฐ below Mars
The pairing appears near the Pleiades and Hyades star clusters high in the evening sky.
March
Mars shines high in evening sky in Taurus, while the three planets that were in the evening sky in January begin to emerge into the dawn sky.
A 200+ degree panorama of the arch of the winter Milky Way, from south (left) to northwest (ar right) with the Zodiacal Light to the west at centre. This was from Dinosaur Provincial Park in southern Alberta on February 28, 2017.
March 1 โ Zodiacal light โseasonโ begins in the evening
From sites away from light pollution look for a faint glow of light rising out of the southwest sky on any clear evening for the next two weeks with no Moon.
March 3 โ Mars 2.5ยฐ below the Pleiades
This will be a nice sight in binoculars tonight and tomorrow high in the evening sky, and a good target for tracked telephoto lens shots.
March 4 โ Mercury and Jupiter just 1/2ยฐ apart
Close to be sure! But this pairing will be so low in the dawn sky it will be difficult to spot. They will appear equally close on March 5 should clouds intervene on March 4.
March 9 โ Line of Mercury, Jupiter, Saturn and waning crescent Moon
Three planets and the waxing crescent Moon form a line across the dawn sky but again, very low in the southeast. The even thinner Moon will be below Jupiter on March 10. Observers at low latitudes (south of 35ยฐ N) will have the best view on these mornings.
March 20 โ Equinox at 5:37 a.m. EDT
Spring officially begins for the northern hemisphere, autumn for the southern, as the Sun crosses the celestial equator heading north. Today, the Sun rises due east and sets due west for photo ops.
March 30 โ Zodiacal light season again!
With the Moon out of the way, the faint zodiacal light can again be seen and photographed in the west over the next two weeks, but only from a site without significant light pollution on the western horizon.
April
The inner planets appear in the evening sky, while Mars meets M35.
The arch of the Milky Way over the Red Deer River valley and badlands at Dry Island Buffalo Jump Provincial Park, Alberta, on May 19/20, 2018 just after moonset of the waxing crescent Moon.
April 6 โ Milky Way arch season begins
With the waning Moon just getting out of view, this morning and for the next two weeks are good nights to shoot panoramas of the bright summer Milky Way as an arch across the sky, with the galactic core in view to the south. The moonless first two weeks of May, June and July will also work this year, but by August the Milky Way is reaching high overhead and so is difficult to capture in a horizontal landscape panorama.
April 24 โ Mercury and Venus 1ยฐ apart
The two inner planets will be very low in the western evening sky tonight and tomorrow, but with clear skies this is a chance to catch both at once. Use a telephoto lens for the best image.
April 26 โ Mars passes 1/2ยฐ north of M35 star cluster
This will be a fine scene for binoculars or a photo op for a tracked telephoto lens or telescope in a long enough exposure to reveal the rich star cluster Messier 35 in Gemini.
May
On May 26 a totally eclipsed Moon shines red in the west before sunrise for western North America.
May 12 โ Venus and Moon 1.5ยฐ apart
Look low in the western evening sky this night for the pairing of the thin crescent Moon and Venus, and the next night, May 13, for the crescent Moon higher and 4ยฐ away from Mercury. These are good nights to capture both inner planets using a short telephoto lens.
May 16 โ Mercury at a favourable evening elongation
With Mercury angled up high in the northwest this is the best week of the year to catch it in the evening sky from northern latitudes.
The total lunar eclipse of April 4, 2015 taken from near Tear Drop Arch, in western Monument Valley, Utah. This is a single 5-second exposure at f/2.8 and ISO 400 with the Canon 24mm lens and Canon 6D, untracked. The sky is brightening with blue from dawn twilight.
May 26 โ Total Eclipse of the Moon
The first total lunar eclipse since January 20, 2019, this โTLEโ can be seen as a total eclipse only from western North America, Hawaii, and from Australia and New Zealand. Totality lasts a brief 15 minutes, with the Moon in Scorpius not far from red Antares. The red Moon in a twilight sky will be beautiful, as it was for the April 4, 2015 eclipse at dawn over Monument Valley, Utah shown above.
Those in western North America will see the totally eclipsed Moon setting into the southwest in the dawn hour before sunrise, as depicted here. Over a suitable landscape this will be a photogenic scene, as even at mid-eclipse the Moon will be bright red because it passes so far from the centre of Earthโs umbral shadow.
Unfortunately, those in eastern North America will have to be content with a view of a partially eclipsed Moon setting in the morning twilight.
A bonus is that this is also the closest and largest Full Moon of 2021, with a close perigee of 357,311 kilometres occurring just 9 hours earlier. So the Full Moon that rises on the evening of May 25 will be the yearโs โsupermoon.โ
See Fred Espenakโs EclipseWise.com page for details on timing and viewing regions. The dark region on this map does not see any of this eclipse.
May 26 โ Comet 7/P Pons-Winnecke at perihelion
The brightest comet predicted to be visible in 2021 (as of this writing) is the short-period Comet Pons-Winnecke (aka Comet 7/P). It reaches its closest point to the Sun โ perihelion โ the night of the lunar eclipse and is well placed in Aquarius high in the southeastern dawn sky above Jupiter and Saturn.
But โฆ it is expected to be only 8th magnitude, making it a binocular object at best, looking like a fuzzball, not the spectacular object depicted here in this exaggerated view of its brightness and tail length.
May 28 โ Mercury and Venus less than 1/2ยฐ apart
Look low in the northwest evening sky for a very close conjunction of the two inner worlds. A telescope will frame them well, with Mercury a tiny crescent and Venus an almost fully illuminated disk.
June
While eastern North America misses the total lunar eclipse, two weeks later observers in the east do get to see a partial solar eclipse.
May 10, 1994 Annular Eclipse taken from a site east of Douglas Arizona Showing “reverse” Bailey’s Beads — lunar mountains just touching Sun’s limb 4-inch f/6 apo refractor at f/15 with Barlow lens, and with Ektachrome 100 slide film !
June 10 โ Annular eclipse of the Sun
Should you manage to get yourself to the path of the Moonโs anti-umbral shadow you will see the dark disk of the Moon contained within the bright disk of the Sun but not large enough to cover the Sun completely. You see a ring of light, as above from a 1994 annular eclipse.
The Moon is near apogee, so its disk is about as small as it gets, in contrast to the perigee Moon two weeks earlier. During the maximum of 3 minutes 51 seconds of annularity the sky will get unusually dark, but none of the dramatic effects of a total eclipse will appear. The annulus of sunlight that remains is still so bright special solar filters must be used at all times, covering the eyes and lenses.
The region with the best accessibility to the path is northwestern Ontario north and east of Thunder Bay. However, the annular phase of the eclipse there occurs at or just after sunrise, so clouds are likely to obscure the view, as are trees!
The eastern seaboard of the U.S. and much of eastern Canada can see a partial eclipse of the Sun, as can most of Europe. For details of times and amount of eclipse see Fred Espenakโs EclipseWise website.
Summer officially begins for the northern hemisphere, winter for the southern, as the Sun reaches its most northerly position above the celestial equator. The Sun rises farthest to the northeast and sets farthest to the northwest, and the length of daylight is at its maximum.
June 22 โ Mars passes through the Beehive star cluster
Mars, now at a modest magnitude +1.8, appears amid the Beehive star cluster, aka M44, tonight and tomorrow evening, but low in the northwest in the twilight sky. Use binoculars or a telescope for the best view.
July
Venus and Mars put on a show low in the western twilight.
July 2 โ Venus passes through the Beehive star cluster
Venus (at a brilliant magnitude -3.9) follows Mars through the Beehive cluster this evening, but with the pairing even lower in the sky, making it tough to pick out the star cluster.
July 4 โ Mercury at a good morning elongation
Though not at its best for a morning appearance from northern latitudes, Mercury should still be easy to spot and photograph in the pre-dawn sky in Taurus, outshining bright Aldebaran.
July 11 โ Grouping of Venus, Mars and waxing crescent Moon
Look low in the evening sky for the line of the thin crescent Moon, bright Venus and dim Mars all in the same binocular field. Venus passes 1/2ยฐ above Mars on the next two nights, July 12 and 13.
July 21 โ Grouping of Venus, Mars and Regulus
The two planets appear with bright Regulus in Leo, all within a binocular field, but again, low in the northwest twilight. The colour contrast of red Mars with white Venus and blue-white Regulus should be apparent in binoculars.
August
The popular Perseid meteors peak, and we can see (maybe!) the extremely close conjunction of Mercury and Mars.
The core of the Milky Way in Sagittarius low in the south over the Frenchman River valley at Grasslands National Park, Saskatchewan.
August 1 โ Milky Way core season opens
For southerly latitudes, the first two weeks of May and June are also good, but from the northern U.S. and much of Canada, the nights donโt get dark enough to see and shoot the bright galactic centre until August. The rich star clouds of Sagittarius now shine due south as it gets dark each night over the next two weeks.
August 2 โ Saturn at opposition
Saturn is at its closest and brightest for 2021 tonight, rising at sunset and shining due south in Capricornus in the middle of the night.
A composite of the Perseid meteors over Dinosaur Provincial Park on the night of August 12/13, 2017.
August 12 โ Perseid meteor shower peaks
The annual Perseid meteor shower peaks tonight with a waxing crescent Moon that sets early, to leave most of the night dark and ideal for watching meteors. Look for the crescent Moon 5ยฐ above Venus on August 10.
August 18 โ Mars and Mercury only 0.06ยฐ apart!
Now this is a very close conjunction, with Mercury passing only 4 arc minutes from Mars (compared to the 6 arc minute separation of the Great Conjunction of Jupiter and Saturn on December 21, 2020). But the planets will be very low in the west at dusk and tough to sight. This will be a conjunction for skilled observers blessed with clear skies and a low horizon.
August 20 โ Jupiter at opposition
Jupiter, now in Aquarius, reaches its closest and brightest for 2021 tonight, also rising at sunset and shining due south in the middle of the night. On the night of August 21/22, the Full Moon, also at opposition โ as all Full Moons are โ appears 4ยฐ below Jupiter, as shown above.
September
Itโs Harvest Moon time, with this annual special Full Moon occurring close to the equinox this year for an ideal geometry, making the Moon rise due east.
Zodiacal Light at dawn on September 24, 2009. Taken from home in Alberta, with a Canon 5D MkII and 15mm lens at f/4 and ISO 800 for 6 minutes, tracking the sky so the ground is blurred.
September 5 โ Zodiacal light โseasonโ begins in the morning
With no Moon for the next two weeks, from sites away from light pollution look to the pre-dawn sky for a faint glow of light rising out of the east before twilight brightens the morning sky.
September 20 โ Full โHarvestโ Moon
Occurring two days before the equinox, this Full Moon will rise nearly due east (a little to the south of east) at sunset and set nearly due west at sunrise at dawn on September 21, for some fine photo ops.
September 22 โ Equinox at 3:21 p.m. EDT
Autumn officially begins for the northern hemisphere, spring for the southern, as the Sun crosses the celestial equator heading south. Today, the Sun rises due east and sets due west for photo ops.
October
Mercury adorns the dawn while Venus shines bright but low at dusk.
October 4 โ Zodiacal light โseasonโ begins in the morning
With the Moon out of the way for the next two weeks, the zodiacal light will again be visible in the east in the pre-dawn hours.
October 9 โ The Moon 2.5ยฐ from Venus
The crescent Moon passes close to Venus this evening, with the pair not far from the star Antares. The low altitude of the worlds lends itself to some fine photo ops. Look for a similar close conjunction on the evening of November 7.
October 25 โ Mercury at its most favourable morning elongation
The high angle of the ecliptic โ the path of the planets โ on autumn dawns swings Mercury up as high as it can get in the morning sky, making this week the best for sighting Mercury as a โmorning starโ in 2021 from northern latitudes.
October 29 โ Venus at its greatest angle away from the Sun
While now farthest from the Sun in our sky, its low altitude at this time of year makes this an unfavourable evening appearance of Venus.
November
The second lunar eclipse brings a mostly red Moon to the skies over North America.
November 3 โ Moon and Mercury 2ยฐ apart, then a daylight occultation
Before dawn, with Mercury still well-placed in the morning sky, the waning crescent Moon shines 2ยฐ above the planet, with Mars below and the star Spica nearby. Later in the day, about noon to early afternoon (the time varies with your location), the Moon will occult (pass in front of) Mercury. This will be a challenging observation even with a telescope, with the pale and thin Moon only 14ยฐ east of the Sun. A very clear sky will be essential!
Total lunar eclipse November 8, 2003. Taken through Astro-Physics 5″ Apo refractor at f/6 with MaxView 40mm eyepiece projection into a Sony DSC-V1 5 megapixel digital camera, mounted afocally.
November 19 โ 97% Partial Eclipse of the Moon
Though not a total eclipse, this is the next best thing: a 97% partial! And unlike the May 26 eclipse, all of North America gets to see this one.
Mid-eclipse, when the Moon is most deeply embedded in Earthโs umbral shadow, occurs at 4:04 a.m. EST (1:04 a.m. PST) on November 19. While not convenient timing, it ensures that all of the continent can see the entire 3.5-hour long eclipse. The partial umbral phase begins at 3:18 a.m EST (12:18 a.m. PST).
At mid-eclipse, the Moon will resemble Mars โ a red world with a bright south โpolar capโ caused by the small 3% of the southern edge of the Moon outside the umbra. Its position near the Pleiades and Hyades clusters will make for a great wide-field image.
Remember โ this occurs on the night of November 18/19! So donโt miss it thinking the eclipse starts on the evening of November 19. Youโll be a day late!
The year ends with a chance to see four planets together at dusk.
Nov. 23, 2003 total solar eclipse over Antarctica on Qantas/Croydon Travel charter flight out of Melbourne, Australia. Sony DSC-V1 camera. 1/3 sec, f/2.8, 7mm lens, max wide-angle.
December 4 โ Total Eclipse of the Sun
I include this for completeness, but this total solar eclipse (TSE) could not be more remote, as the path of totality lies over Antarctica. Only the most intrepid will be there, in expedition ships and in aircraft. (I took this image over Antarctica at the November 23, 2003 total eclipse one 18-year Saros cycle before this yearโs TSE.) Even the partial phases are visible only from southernmost Australia and Africa.
December 6 โ Moon 2.5ยฐ below Venus
With Venus just past its official December 3 date of โgreatest brilliancyโ (at magnitude -4.7), the waxing crescent Moon appears close below it, with Saturn and Jupiter further along the line of the ecliptic in the southwest. The Moon appears below Saturn on December 7 and below Jupiter on December 8.
A single bright meteor from the Geminid meteor shower of December 2017, dropping toward the horizon in Ursa Major.
December 13 โ Geminid meteor shower peaks
The most prolific meteor shower of the year peaks with a waxing 10-day-old gibbous Moon lighting the sky, so not great conditions. But with luck it will still be possible to see and capture bright fireballs.
December 21 โ Solstice at 10:59 a.m. EST
Winter officially begins for the northern hemisphere, summer for the southern, as the Sun reaches its most southerly position below the celestial equator. The Sun rises farthest to the southeast and sets farthest to the southwest, and the length of daylight is at its minimum.
December 31 โ Four planets in view
As the year ends the same three planets that adorned the evening sky in early January are back, with the addition of Venus. So on New Yearโs Eve we can see four of the naked eye planets (only Mars is missing) at once in the evening sky.
On December 21 we have a chance to see and shoot a celestial event that no one has seen since the year 1226.
As Jupiter and Saturn each orbit the Sun, Jupiter catches up to slower moving Saturn and passes it every 20 years. For a few days the two giant planets appear close together in our sky. The last time this happened was in 2000, but with the planets too close to the Sun to see.
Back on February 18, 1961 the two planets appeared within 14 arc minutes or 0.23ยฐ (degrees) of each other low in the dawn sky.
But on December 21 they will pass each other only 6 arc minutes apart. To find a conjunction that close and visible in a darkened sky you have to go all the way back to March 5, 1226 when Jupiter passed only 3 arc minutes above Saturn at dawn. Thus the media headlines of a โChristmas Starโ no one has seen for 800 years!
Photographing the conjunction will be a challenge precisely because the planets will be so close to each other. Here are several methods I can suggest, in order of increasing complexity and demands for specialized gear.
Easy โ Shooting Nightscapes with Wide Lenses
This shows the field of view of various lenses on full-frame cameras (red outlines) and a 200mm lens with 1.4x tele-extender on a cropped frame camera (blue outline). The date is December 17 when the waxing crescent Moon also appears near the planet pair for a bonus element in a nightscape image.
Conjunctions of planets in the dusk or dawn twilight are usually easy to capture. Use a wide-angle (24mm) to short telephoto (85mm) lens to frame the scene and exposures of no more than a few seconds at ISO 200 to 400 with the lens at f/2.8 to f/4.
The sky and horizon might be bright enough to allow a cameraโs autoexposure and autofocus systems to work.
Indeed, in the evenings leading up to and following the closest approach date of December 21 thatโs a good method to use. Capture the planet pair over a scenic landscape or urban skyline to place them in context.
For most locations the planets will appear no higher than about 15ยฐ to 20ยฐ above the southwestern horizon as it gets dark enough to see and shoot them, at about 5 p.m. local time. A 50mm lens on a full-frame camera (or a 35mm lens on a cropped frame camera) will frame the scene well.
This was Jupiter and Saturn on December 3, 2020 from the Elbow Falls area on the Elbow River in the Kananaskis Country southwest of Calgary. This is a blend of 4 untracked images for the dark ground, stacked to smooth noise, for 30 seconds each, and one untracked image for the bright sky for 15 seconds to preserve colours and highlights, all with the 24mm Sigma lens and Canon EOS Ra at ISO 200.
NIGHTSCAPE TIP โ Use planetarium software such as Stellarium (free), SkySafari, or StarryNight (what I used here) to simulate the framing with your lens and camera. Use that software to determine where the planets will be in azimuth, then use a photo planning app such as PhotoPills or The Photographerโs Ephemeris to plan where to be to place the planets over the scene you want at that azimuth (theyโll be at about 220ยฐ to 230ยฐ โ in the southwest โ for northern latitude sites).ย
This was Jupiter and Saturn on December 10, 2020 from Red Deer River valley, north of Drumheller, Alberta. This is a blend of 4 images for the dark ground, stacked to smooth noise, for 20 seconds each at f/5.6, and a single image for the sky for 5 seconds at f/2.8, all with the 35mm Canon lens and Canon EOS Ra at ISO 400. All untracked.
Harder โ Shooting With Longer Lenses
The planet pair will sink lower and closer to the horizon, to set about 7:00 to 7:30 p.m. local time each night.
As the sky darkens and the planet altitude decreases you can switch to ever-longer lenses to zoom in on the scene and still frame the planets above a carefully-chosen horizon, assuming you have very clear skies free of haze and cloud.
For example, by 6 p.m. they will be low enough to allow a 135mm telephoto to frame the planets and still have the horizon in the frame. Using a longer lens has the benefit or resolving the two planets better, showing them as two distinct objects, which will become more of a challenge the closer you are to December 21.
On December 21 wide-angle and even short telephoto lenses will likely show the two planets as an unresolved point of light, no brighter than Jupiter on its own.
On closest approach day the planets will be so close that using a wide-angle or even a normal lens might only show them as an unresolved blob of light. Youโll need more focal length to split the planets well into two objects.
However, using longer focal lengths introduces a challenge โ the motion of the sky will cause the planets to trail during long exposures, turning them from points into streaks. That trailing will get more noticeable more quickly the longer the lens you use.
A rule-of-thumb says the longest exposure you can employ before trailing becomes apparent is 500 / the focal length of the lens. So for a 200mm lens, maximum exposure is 500 / 200 = 2.5 seconds.
To be conservative, a โ300 Ruleโ might be better, restricting exposures with a 200mm telephoto to 300 / 200 = 1.5 seconds. Now, 1.5 seconds might be long enough for the scene, especially if you use a fast lens wide open at f/2.8 or f/2 and a faster ISO such as 400 or 800.
This shows the motion of Jupiter relative to Saturn from December 17 to 25, with the outer frame representing the field of view of a 200mm lens and 1.4x tele-extender on a cropped frame camera. The smaller frame shows the field of a telescope with an effective focal length of 1,200mm.
TELEPHOTO TIP โ Be sure to focus carefully using Live View to manually focus on a magnified image of the planets. And refocus through an evening of shooting. While people fuss about getting the one โcorrectโ exposure, it is poor focus that ruins more astrophotos.ย
Even More Demanding โ Tracking Longer Lensesย
This one popular sky tracker, the iOptron SkyGuider Pro, here with a telephoto lens. It and other trackers such as the Sky-Watcher Star Adventurer seen in the opening image, can be used with lenses and telescopes up to about 300mm focal length, if they are balanced well. Even longer lenses might work for the short exposures needed for the planets, but vibration and wind can blur images.
However, longer exposures might be needed later in the evening when the sky is darker, to set the planets into a starry background. After December 17 we will have a waxing Moon in the evening sky to light the sky and foreground, so the sky will not be dark, even from a rural site.
Even so, to ensure untrailed images with long telephotos โ and certainly with telescopes โ you will need to employ a sky tracker, a device to automatically turn the camera to follow the sky. If you donโt have one, itโs probably too late to get one and learn how to use it! But if you have one, hereโs a great opportunity to put it to use.
Polar align it (youโll have to wait for it to get dark enough to see the North Star) and then use it to take telephoto close-up images of the planets with exposure times that can now be as long as you like, though they likely wonโt need to be more than 10 to 20 seconds.
You can now also use a slower ISO speed for less noise.
TRACKER TIP โ Use a telephoto to frame just the planets, or include some foreground content such as a hilltop, if it can be made to fit in the frame. Keep in mind that the foreground will now blur from the tracking, which might not be an issue. If it is, take exposures of the foreground with the tracker motor off, to blend in later in processing.ย
The Most Difficult Method โ Using a Telescope
An alt-azimuth mounted GoTo scope like this Celestron SE6 can work for short exposures of the planets, provided it is aligned and is tracking properly. Good focus will be critical.
Capturing the rare sight of the planets as two distinct disks (not just dots of light) accompanied by their moons, all together in the same frame, is possible anytime between now and the end of the year.
But โฆ resolving the disks of the planets takes focal length โ a lot of focal length! And that means using a telescope on a mount that can track the stars.
While a sky tracker might work, they are not designed to handle long and heavy lenses and telescopes. Youโd need a telescope on a solid mount, though it could be a โGoToโ telescope on an alt-azimuth mount. Such a mount, while normally not suited for long-exposure deep-sky imaging, will be fine for the short exposures needed for the planets.
You will need to attach your camera to the telescope using a camera adapter, so the scope becomes the lens. If you have never done this, to shoot closeups of the Moon for example, and donโt have the right adapters and T-rings, then this isnโt the time to learn how to do it.
A simulation of the view with a 1,200mm focal length telescope on December 21. Even with such a focal length the planet disks still appear small.
TELESCOPE TIPย โ As an alternative, it might be possible to shoot the planets using a phone camera clamped to the low-power eyepiece of a telescope, but focusing and setting the exposure can be tough. It might not be worth the fuss in the brief time you have in twilight, perhaps on the one clear night you get! Just use your telescope to look and enjoy the view!ย
But if you have experience shooting the Moon through your telescope with your DSLR or mirrorless camera, then you should be all set, as the gear and techniques to shoot the planets are the same.
This is the setup I might use for a portable rig best for a last-minute chase to clear skies. It’s a Sky-Watcher EQM-35 mount with a 105mm apo refractor (the long-discontinued Astro-Physics Traveler), and here with a 2x Barlow to double the effective focal length to 1,200mm.
However, once again the challenge is just how close the planets are going to get to each other. Even a telescope with a focal length of 1200mm (typical for a small scope) still gives a field of view 1ยฐ wide using a cropped frame camera. Thatโs 60 arc minutes, ten times the 6 arc minute separation of Jupiter and Saturn on December 21!
TELESCOPE TIPย โ Use a 2x or 3x Barlow lens if needed to increase the effective focal length of the scope. Beware that introducing a Barlow into the light path usually requires racking the focus out and/or adding extension tubes to reach focus. Test your configuration as soon as possible to make sure you can focus it.ย
TELESCOPE TIPย โ With such long focal lengths shoot lots of exposures. Some will be sharper than others.ย
TELESCOPE TIPย โ But be sure to focus precisely, and refocus over the hour or so you might be shooting, as changing temperatures will shift the focus. You canโt fix bad focus!ย
Jupiter and Saturn in the same telescope field on December 5, 2020. Some of the moons are visible in this exposure taken in twilight before the planets got too low in the southwest. This is a single exposure with a 130mm Astro-Physics apo refractor at f/6 (so 780mm focal length) for 4 seconds at ISO 200 with the Canon 6D MkII. The disks of the planets are overexposed to bring out the moons.
Short exposures under one second might be needed to keep the planet disks from overexposing. Capturing the moons of Jupiter (it has four bright moons) and Saturn (it has two, Titan and Rhea, that are bright) will require exposures of several seconds. Going even longer will pick up background stars.
Or โฆ with DSLRs and mirrorless cameras, try shooting HD or 4K movies. They will likely demand a high and noisy ISO, but might capture the view more like you saw and remember it.
FINAL TIP โ Whatever combination of gear you decide to use, test it! Donโt wait until December 21 to see if it works, nor ask me if I think such-and-such a mount, telescope or technique will work. Test for yourself to find out.
Jupiter and Saturn taken in the deep twilight on December 3, 2020 from the Allen Bill flats area on the Elbow River in the Kananaskis Country southwest of Calgary, Alberta. This is a blend of 4 untracked images for the dark ground, stacked to smooth noise, for 2 minutes each at ISO 400, and two tracked images for the sky (and untrailed stars) for 30 seconds each at ISO 400, all with the 35mm Canon lens at f/2.8 and Canon EOS Ra. The tracker was the Sky-Watcher Star Adventurer 2i.
Donโt Fret or Compete. Enjoy!ย
The finest images will come from experienced planetary imagers using high-frame-rate video cameras to shoot movies, from which software extracts and stacks the sharpest frames. Again, if you have no experience with doing that (I donโt!), this is not the time to learn!
And even the pros will have a tough time getting sharp images due to the planetsโ low altitude, even from the southern hemisphere, where some pro imagers have big telescopes at their disposal, to get images no one else in the world can compete with!
In short, use the gear you have and techniques you know to capture this unique event as best you can. And if stuff fails, just enjoy the view!
Jupiter and Saturn taken December 3, 2020 from the Allen Bill flats area on the Elbow River in the Kananaskis Country southwest of Calgary, Alberta. This is a blend of 4 untracked images for the dark ground, stacked to smooth noise, for 2 minutes each at ISO 400, and two tracked images for the sky for 30 seconds at ISO 1600, all with the 35mm Canon lens at f/2.8 and Canon EOS Ra. The tracker was the Sky-Watcher Star Adventurer 2i.
If you miss closest approach day due to cloud, donโt worry.
Even when shooting with telephoto lenses the photo ops will be better in the week leading up to and following December 21, when the greater separation of the planets will make it easier to capture a dramatic image of the strikingly close pairing of planets over an Earthly scene.
I present my top 10 tips for capturing time-lapses of the moving sky.ย
If you can take one well-exposed image of a nightscape, you can take 300. Thereโs little extra work required, just your time. But if you have the patience, the result can be an impressive time-lapse movie of the night sky sweeping over a scenic landscape. Itโs that simple.ย
Or is it?ย
Here are my tips for taking time-lapses, in a series of โDoโsโ and โDonโtsโ that Iโve found effective for ensuring great results.ย
But before you attempt a time-lapse, be sure you can first capture well-exposed and sharply focused still shots. Shooting hundreds of frames for a time-lapse will be a disappointing waste of your time if all the images are dark and blurry.ย
For that reason many of my tips apply equally well to shooting still images. But taking time-lapses does require some specialized gear, techniques, planning, and software. First, the equipment.ย
NOTE: This article appeared originally in Issue #9 of Dark Sky Travels e-magazine.
SELECTING EQUIPMENT
Essential Gear Time-lapse photography requires just the camera and lens you might already own, but on a solid tripod (a carbon-fibre Manfrotto with an Acratech ball-head is shown here), and with an intervalometer.ย
TIP 1 โ DO: ย Use a solid tripodย
A lightweight travel tripod that might suffice for still images on the road will likely be insufficient for time-lapses. Not only does the camera have to remain rock steady for the length of the exposure, it has to do so for the length of the entire shoot, which could be several hours. Wind canโt move it, nor any camera handling you might need to do mid-shoot, such as swapping out a battery.ย
The tripod neednโt be massive. For hiking into scenic sites youโll want a lightweight but sturdy tripod. While a carbon fibre unit is costly, youโll appreciate its low weight and good strength every night in the field. Similarly, donโt scrimp on the tripod head.ย
TIP 2 โ DO: ย Use a fast lens
The All-Important Lens A fast lens is especially critical for time-lapses to allow capturing good sky and ground detail in each exposure, as compositing later wonโt be feasible. This is the Sigma 20mm f/1.4 Art lens.
As with nightscape stills, the single best purchase you can make to improve your images of dark sky scenes is not buying a new camera (at least not at first), but buying a fast, wide-angle lens.ย
Ditch the slow kit zoom and go for at least an f/2.8, if not f/2, lens with 10mm to 24mm focal length. This becomes especially critical for time-lapses, as the fast aperture allows using short shutter speeds, which in turn allows capturing more frames in a given period of time. That makes for a smoother, slower time-lapse, and a shoot you can finish sooner if desired.ย
TIP 3 โ DO: ย Use an intervalometer
Canon intervalometer functions
Nikon intervalometer functions
Automating the Camera The intervalometer is also key. For cameras without an internal intervalometer (screens from a Canon and a Nikon are shown above), an outboard unit like one of these, is essential. Be sure to get the model that fits your cameraโs remote control jack.
Time-lapses demand the use of an intervalometer to automatically fire the shutter for at least 200 to 300 images for a typical time-lapse. Many cameras have an intervalometer function built into their firmware. The shutter speed is set by using the camera in Manual mode.ย
Just be aware that a cameraโs 15-second exposure really lasts 16 seconds, while a 30-second shot set in Manual is really a 32-second exposure.ย
So in setting the interval to provide one second between shots, as I advise below, you have to set the cameraโs internal intervalometer for an interval of 17 seconds (for a shutter speed of 15 seconds) or 33 seconds (for a shutter speed of 30 seconds). Itโs an odd quirk Iโve found true of every brand of camera I use or have tested.ย
Alternatively, you can set the camera to Bulb and then use an outboard hardware intervalometer (they sell for $60 on up) to control the exposure and fire the shutter. Test your unit. Its interval might need to be set to only one second, or to the exposure time + one second.ย
How intervalometers define โIntervalโ varies annoyingly from brand to brand. Setting the interval incorrectly can result in every other frame being missed and a ruined sequence.
SETTING YOUR CAMERA
TIP 4 โ DONโT: ย Underexpose
Expose to the Right When shooting, choose settings that will yield a histogram that is not slammed to the left, but is shifted to the right to minimize noise and lift details in the shadows.
As with still images, the best way to beat noise is to give the camera signal. Use a wider aperture, a longer shutter speed, or a higher ISO (or all of the above) to ensure the image is well exposed with a histogram pushed to the right.ย
If you try to boost the image brightness later in processing youโll introduce not only the very noise you were trying to avoid, but also odd artifacts in the shadows such as banding and purple discolouration.ย
With still images we have the option of taking shorter, untrailed images for the sky, and longer exposures for the dark ground to reveal details in the landscape, to composite later. With time-lapses we donโt have that luxury. Each and every frame has to capture the entire scene well.ย
At dark sky sites, expose for the dark ground as much as you can, even if that makes the sky overly bright. Unless you outright clip the highlights in the Milky Way or in light polluted horizon glows, youโll be able to recover highlight details later in processing.ย
After poor focus, underexposure, resulting in overly noisy images, is the single biggest mistake I see beginners make.
TIP 5 โ DONโT: ย Worry about 500 or “NPF” Exposure Rules
Stills from a Sequence A stack of single frames from a time-lapse sequence can often make a good still image, such as this scene of the Space Station rising over Waterton Lakes National Park. The 30-second exposures were just within the “500 Rule” for the 15mm lens used here, but minor star trailing wonโt be that noticeable in a final movie.
While still images might have to adhere to the โ500 Ruleโ or the stricter โNPF Ruleโ to avoid star trailing, time-lapses are not so critical. Slight trailing of stars in each frame wonโt be noticeable in the final movie when the stars are moving anyway.ย
So go for rule-breaking, longer exposures if needed, for example if the aperture needs to be stopped down for increased depth of field and foreground focus. Again, with time-lapses we canโt shoot separate exposures for focus stacking later.ย
Just be aware that the longer each exposure is, the longer it will take to shoot 300 of them.ย
Why 300? I find 300 frames is a good number to aim for. When assembled into a movie at 30 frames per second (a typical frame rate) your 300-frame clip will last 10 seconds, a decent length of time in a final movie.ย
You can use a slower frame rate (24 fps works fine), but below 24 the movie will look jerky unless you employ advanced frame blending techniques. I do that for auroras.
PhotoPills Calculator Apps such as PhotoPills offer handy calculators for juggling exposure time vs. the number of frames to yield the length of the time-lapse shoot.
Bonus Tip
How long it will take to acquire the needed 300 frames will depend on how long each exposure is and the interval between them. An app such as PhotoPills (via its Time lapse function) is handy in the field for calculating exposure time vs. frame count vs. shoot length, and providing a timer to let you know when the shoot is done.ย
TIP 6 โ DO: ย Use short intervals
Mind the Gap! At night use intervals as short as possible to avoid gaps in time, simulated here (at top) by stacking several time-lapse frames taken at a one-second interval into one image. Using too long an interval, as demonstrated just above, yields gaps in time and jumps in the star motion, simulated here by stacking only every other frame in a sequence.ย
At night, the interval between exposures should be no more than one or two seconds. By โinterval,โ I mean the time between when the shutter closes and when it opens again for the next frame.ย
Not all intervalometers define โInterval” that way. But itโs what you expect it means. If you use too long an interval then the stars will appear to jump across the sky, ruining the smooth motion you are after.ย
In practice, intervals of four to five seconds are sometimes needed to accommodate the movement of motorized โmotion controlโ devices that turn or slide the camera between each shot. But Iโm not covering the use of those advanced units here. I cover those options and much, much more in 400 pages of tips, techniques and tutorials in my Nightscapes ebook, linked to above.
However, during the day or in twilight, intervals can be, and indeed need to be, much longer than the exposures. Itโs at night with stars in the sky that you want the shutter to be closed as little as possible.ย
TIP 7 โ DO: ย Shoot Raw
The Power of Raw Shooting raw, even for time-lapse frames that will eventually be turned into JPGs, allows for maximum control of shadows, highlights, colour balance, and noise reduction. “Before” is what came out of the camera; “After” is with the development settings shown applied in Camera Raw.
This advice also applies to still images where shooting raw files is essential for professional results. But you likely knew that.
However, with time-lapses some cameras offer a mode that will shoot time-lapse frames and assemble them into a movie right in the camera. Donโt use it. It gives you a finished, pre-baked movie with no ability to process each frame later, an essential step for good night time-lapses. And raw files provide the most data to work with.
So even with time-lapses, shoot raw not JPGs.ย
If you are confident the frames will be used only for a time-lapse, you might choose to shoot in a smaller S-Raw or compressed C-Raw mode, for smaller files, in order to fit more frames onto a card.ย
But I prefer not to shrink or compress the original raw files in the camera, as some of them might make for an excellent stacked and layered still image where I want the best quality originals (such as for the ISS over Waterton Lakes example above).ย
To get you through a long field shoot away from your computer buy more and larger memory cards. You donโt need costly, superfast cards for most time-lapse work.ย
PLANNING AND COMPOSITION
TIP 8 โ DO: ย Use planning apps to frameย
Planning the Shoot Apps such as The Photographerโs Ephemeris (shown here set for the authorโs Waterton Lakes site for moonrise) help in planning where the Sun, Moon and Milky Way will be from your site during the shoot.
Simulating the Shoot The companion app to The Photographerโs Ephemeris, TPE 3D, shown above in the inset, exactly matches the real scene for the mountain skyline, placement of the Milky Way, and lighting from the rising Moon.ย
All nightscape photography benefits from using one of the excellent apps we now have to assist us in planning a shoot. They are particularly useful for time-lapses.ย
Apps such as PhotoPills and The Photographerโs Ephemeris are great. I like the latter as it links to its companion TPE 3D app to preview what the sky and lighting will look like over the actual topographic horizon from your site. You can scrub through time to see the motion of the Milky Way over the scenery. The Augmented Reality “AR” modes of these apps are also useful, but only once you are on site during the day.
For planning a time-lapse at home I always turn to a โplanetariumโ program to simulate the motion of the sky (albeit over a generic landscape), with the ability to add in โfield of viewโ indicators to show the view your lens will capture.ย
You can step ahead in time to see how the sky will move across your camera frame during the length of the shoot. Indeed, such simulations help you plan how long the shoot needs to last until, for example, the galactic core or Orion sets.
Planetarium software helps ensure you frame the scene properly, not only for the beginning of the shoot (thatโs easy โ you can see that!), but also for the end of the shoot, which you can only predict.ย
Planetarium Planning An alternative is to use a planetarium program such as the free Stellarium, shown above, which can display lens fields of view. These scenes show the simulated vs. real images (insets) for the start (top) and end (bottom) of the Waterton Lakes time-lapse with a 35mm lens frame, outlined in red.ย
If your shoot will last as long as three hours, do plan to check the battery level and swap batteries before three hours is up. Most cameras, even new mirrorless models, will now last for three hours on a full battery, but likely not any longer. If itโs a cold winter night, expect only one or two hours of life from a single battery.
PROCESSING
TIP 9 โ DO: ย Develop one raw frame and apply settings to all
Copy and Paste Settings Most raw developers or photo library programs (Adobe Bridge is shown here) offer the essential ability to copy settings from one image and paste them onto hundreds of others in a folder, developing all the time-lapse frames in a snap.
Processing the raw files takes the same steps and settings as you would use to process still images.ย
With time-lapses, however, you have to do all the processing required within your favourite raw developer software. You canโt count on bringing multiple exposures into a layer-based processor such as Photoshop to stack and blend images. That works for a single image, but not for 300.ย
I use Adobe Camera Raw out of Adobe Bridge to do all my time-lapse processing. But many photographers use Lightroom, which offers all the same settings and non-destructive functions as Adobe Camera Raw.ย
For those who wish to โavoid Adobeโ there are other choices, but for time-lapse work an essential feature is the ability to develop one frame, then copy and paste its settings (or โsyncโ settings) to all the other frames in the set.ย
Not all programs allow that. Affinity Photo does not. Luminar doesnโt do it very well. DxO PhotoLab, ON1 Photo RAW, and the free Raw Therapee, among others, all work fine.ย
HOW TO ASSEMBLE A TIME-LAPSE
Once you have a set of raws all developed, the usual workflow is to export all those frames out as high-quality JPGs which is what movie assembly programs need. Your raw developing software has to allow batch exporting to JPGs โ most do.ย
Photoshop Batch Export Raw developers usually have a batch export function. So does Photoshop, via its Image Processor utility, shown here (found under File>Scripts>Image Processor) that can export a folder of raws into JPGs or TIFFs, and re-size them, often needed for final 4K or HD movies.ย
However, none of the programs above (except Photoshop and Adobeโs After Effects) will create the final movie, whether it be from those JPGs or from the raws.ย
Assembling JPGs The authorโs favourite assembly program is TimeLapse DeFlicker (TLDF). It can turn a folder of JPGs into movies as large as 8K and with ProRes codecs for the highest quality.
So for assembling the intermediate JPGs into a movie, I often use a low-cost program called TLDF (TimeLapse DeFlicker) available for MacOS and Windows (timelapsedeflicker.com). It offers advanced functions such as deflickering (i.e. smoothing slight frame-to-frame brightness fluctuations) and frame blending (useful to smooth aurora motions or to purposely add star trails).
While there are many choices for time-lapse assembly, I suggest using a program dedicated to the task and not, as many do, a movie editing program. For most sequences, the latter makes assembly unnecessarily difficult and harder to set key parameters such as frame rates.ย
TIP 10 โ DO: ย Try LRTimelapse for more advanced processing
Working on Keyframes The advanced processing program LRTimelapse creates several keyframes through the sequence (seven are shown here in Adobe Bridge) which you develop so each looks its best. During this sequence, the Moon rose changing the lighting toward the end of the shoot (in the last three keyfames).ย
Get serious about time-lapse shooting and you will want โ indeed, you will need โ the program LRTimelapse (LRTimelapse.com). A free but limited trial version is available.ย
This powerful program is for sequences where one setting will not work for all the frames. One size does not fit all.
Instead, LRTimelapse allows you to process a few keyframes throughout a sequence, say at the start, middle, and end. It then interpolates all the settings between those keyframes to automatically process the entire set of images to smooth (or โrampโ) and deflicker the transitions from frame to frame.ย
LRTimelapse Ramping LRTimelapse reads your developed keyframe data and applies smooth transitions of all settings to each of the raw files between the keyframes. The result is a seamless and smooth final movie. The pink curve shows how the scene brightened at moonrise. The blue diamonds on the yellow line mark the seven keyframes.ย
This is essential for sequences where the lighting changes during the shoot (say, the Moon rises or sets), and for so-called โholy grails.โ Those are advanced sequences that track from daylight or twilight to darkness, or vice versa, over a wide range of camera settings.
However, LRTimelapse works only with Adobe Lightroom or the Adobe Camera Raw/Bridge combination. So for advanced time-lapse work Adobe software is essential.ย
A Final Bonus Tip
Keep it simple. You might aspire to emulate the advanced sequences you see on the web, where the camera pans and dollies during the movie. I suggest avoiding complex motion control gear at first to concentrate on getting well-exposed time-lapses with just a static camera. That alone is a rewarding achievement.
But before that, first learn to shoot still images successfully. All the settings and skills you need for a great looking still image are needed for a time-lapse. Then move onto capturing the moving sky.ย
I end with a link to an example music video, shot using the techniques I’ve outlined. Thanks for reading and watching. Clear skies!
The Beauty of the Milky Way from Alan Dyer on Vimeo.
ยฉ 2019 Alan Dyer
Alan Dyer is author of the comprehensive ebook How to Photograph and Process Nightscapes and Time-Lapses. His website is www.amazingsky.comย
I put the new Nikon Z6 mirrorless camera through its paces for astrophotography.ย
Following Sonyโs lead, in late 2018 both Nikon and Canon released their entries to the full-frame mirrorless camera market.ย
Here I review one of Nikonโs new mirrorless models, the Z6, tested solely with astrophotography in mind. I did not test any of the auto-exposure, auto-focus, image stabilization, nor rapid-fire continuous mode features.ย
In my testing I compared the Nikon Z6 (at right above) to two competitive cameras, the relatively new Sony a7III mirrorless (at left above) and 2015-vintage Nikon D750 DSLR.
All three are โentry-levelโ full-frame cameras, with 24 megapixels and in a similar $2,000 price league, though the older D750 now often sells at a considerable discount.
Disclosure
I should state at the outset that my conclusions are based on tests conducted over only three weeks in mid-winter 2019 while I had the camera on loan from Nikon Canada’s marketing company.ย
I don’t own the camera and didn’t have many moonless nights during the loan period to capture a lot of “beauty” shots under the stars with the Z6.
An arc of the auroral oval across the northern horizon on the night of January 10-11, 2019. With the Sigma 14mm lens and Nikon Z6 for testing.
However, I think my testing was sufficient to reveal the camera’s main traits of interest โ as well as deficiencies it might have โ for astrophotography.
I should also point out that I do not participate in โaffiliate links,โ so I have no financial motivation to prompt you to buy gear from merchants.ย
In short โ I found the Nikon Z6 superb for astrophotography.ย
Summary:
โขย It offers as low a noise level as youโll find in a 24-megapixel full-frame camera, though its noise was not significantly lower than the competitive Sony a7III, nor even the older Nikon D750.ย
โขย The Z6โs ISO-invariant sensor proved excellent when dealing with the dark underexposed shadows typical of Milky Way nightscapes.
โขย The Live View was bright and easy to enhance to even brighter levels using the Movie mode to aid in framing nightscapes.ย
โขย When shooting deep-sky images through telescopes using long exposures, the Z6 did not exhibit any odd image artifacts such as edge vignetting or amplifier glows, unlike the Sony a7III. See my review of that camera in my blog from 2018.ย
Recommendations:ย
โขย Current owners of Nikon cropped-frame cameras wanting to upgrade to full-frame would do well to consider a Z6 over any current Nikon DSLR.ย
โขย Anyone wanting a full-frame camera for astrophotography and happy to โgo Nikonโ will find the Z6 nearly perfect for their needs.ย
Nikon Z6 vs. Z7
I opted to test the Z6 over the more expensive Z7, as the 24-megapixel Z6 has 6-micron pixels resulting in lower noise (according to independent tests) than the 46 megapixel Z7 with its 4.4 micron pixels.ย
In astrophotography, I feel low noise is critical, with 24-megapixel cameras hitting a sweet spot of noise vs. resolution.
However, if the higher resolution of the Z7 is important for your daytime photography needs, then Iโm sure it will work well at night. The Nikon D850 DSLR, with a sensor similar to the Z7, has been proven by others to be a good astrophotography camera, albeit with higher noise than the lesser megapixel Nikons such as the D750 and Z6.
NOTE: Tap or click on images to download and display them full screen for closer inspection.
High ISO Noise
The three 24-megapixel cameras compared at three high ISO levels in a close-up of a dark-sky nightscape.
To test noise in a real-world situation, I shot a dark nightscape scene with the three cameras, using a 24mm Sigma Art lens on the two Nikons, and a 24mm Canon lens on the Sony via a MetaBones adapter. I shot at ISOs from 800 to 12,800, typical of what we use in nightscapes and deep-sky images.ย
The comparison set above shows performance at the higher ISOs of 3200 to 12,800. I saw very little difference among the trio, with the Nikon Z6 very similar to the Sony a7III, and with the four-year-old Nikon D750 holding up very well against the two new cameras.ย
The comparison below shows the three cameras on another night and at ISO 3200.
The three cameras compared for noise at properly exposed moonlit scenes at ISO 3200, a typical nightscape setting.
Both the Nikon Z6 and Sony a7III use a backside illuminated or “BSI” sensor, which in theory is promises to provide lower noise than a conventional CMOS sensor used in an older camera such as the D750.ย
In practice I didnโt see a marked difference, certainly not as much as the one- or even 1/2-stop improvement in noise I might have expected or hoped for.
Nevertheless, the Nikon Z6 provides as low a noise level as youโll find in a camera offering 24 megapixels, and will perform very well for all forms of astrophotography.ย
ISO Invariance
The three cameras compared for ISO invariance at 0EV (well exposed) and -5EV (5 stops underexposed then brightened in processing).
Nikon and Sony both employ an โISO-invariantโ signal flow in their sensor design. You can purposely underexpose by shooting at a lower ISO, then boost the exposure later โin postโ and end up with a result similar to an image shot at a high ISO to begin with in the camera.ย
I find this feature proves its worth when shooting Milky Way nightscapes that often have well-exposed skies but dark foregrounds lit only by starlight. Boosting the brightness of the landscape when developing the raw files reveals details in the scene without unduly introducing noise, banding, or other artifacts such as magenta tints.ย
Thatโs not true of โISO variantโ sensors, such as in most Canon cameras. Such sensors are far less tolerant of underexposure and are prone to noise, banding, and discolouration in the brightened shadows.
To test the Z6โs ISO invariance (as shown above) I shot a dark nightscape at ISO 3200 for a properly exposed scene, and also at ISO 100 for an image underexposed by a massive 5 stops. I then boosted that image by 5 stops in exposure in Adobe Camera Raw. Thatโs an extreme case to be sure.ย
I found the Z6 provided very good ISO invariant performance, though with more chrominance specking than the Sony a7III and Nikon D750 at -5 EV.
Below is a less severe test, showing the Z6 properly exposed on a moonlit night and at 1 to 4 EV steps underexposed, then brightened in processing. Even the -4 EV image looks very good.
This series taken under moonlight shows that even images underexposed by -4 EV in ISO and boosted later by +4 EV in processing look similar for noise and image quality as an image properly exposed in the camera (at ISO 800 here).
In my testing, even with frames underexposed by -5 EV, I did not see any of the banding effects (due to the phase-detect auto-focus pixels) reported by others.ย
As such, I judge the Z6 to be an excellent camera for nightscape shooting when we often want to extract detail in the shadows or dark foregrounds.ย
Compressed vs. Uncompressed / Raw Large vs. Smallย
Comparing Z6 images shot at full resolution and at Medium Raw size. to show resolution and noise differences.
The Z6, as do many Nikons, offers a choice of shooting 12-bit or 14-bit raws, and either compressed or uncompressed.ย
I shot all my test images as 14-bit uncompressed raws, yielding 46 megabyte files with a resolution of 6048 x 4024 pixels. So I cannot comment on how good 12-bit compressed files are compared to what I shot. Astrophotography demands the best original data.ย
However, as the menu above shows, Nikon now also offers the option of shooting smaller raw sizes. The Medium Raw setting produces an image 4528 x 3016 pixels and a 18 megabyte file (in the files I shot), but with all the benefits of raw files in processing.
The Z cameras use the XQD style memory cards and in a single card slot. The fast XQDs are ideal for recording 4K movies at high data rates but are more costly than the more common SD cards.
The Medium Raw option might be attractive when shooting time-lapses, where you might need to fit as many frames onto the single XQD card as possible, yet still have images large enough for final 4K movies.ย
However, comparing a Large Raw to a Medium Raw did show a loss of resolution, as expected, with little gain in noise reduction.ย
This is not like โbinning pixelsโ in CCD cameras to increase signal-to-noise ratio. I prefer to never throw away information in the camera, to allow the option of creating the best quality still images from time-lapse frames later.ย
Nevertheless, itโs nice to see Nikon now offer this option on new models, a feature which has long been on Canon cameras.ย
Star Image Quality
The Orion Nebula with the Nikon Z6
The Orion Nebula with the Nikon D750
Above is the Orion Nebula with the D750 and with the Z6, both shot in moonlightย with the same 105mmย refractor telescope.
I did not find any evidence for โstar-eatingโ that Sony mirrorless cameras have been accused of. (However, I did not find the Sony a7III guilty of eating stars either.) Star images looked as good in the Z6 as in the D750.ย
A single Orion Nebula image with the Z6 in a 600% blow-up in Adobe Camera Raw, showing clean artifact-free star images with good, natural colours.
Raw developers (Adobe, DxO, ON1, and others) decoded the Z6โs Bayer-array NEF files fine, with no artifacts such as oddly-coloured or misshapen stars, which can arise in cameras lacking an anti-alias filter.ย
LENR Dark framesย
A blank long exposure with no LENR applied – click or tap to open the image full screen
A blank long exposure with LENR – tap or click to open the image full screen
Above, 8-minute exposures of nothing, taken with the lens cap on at room temperature:ย without LENR, andย with LENR, both boosted a lot in brightness and contrast toย exaggerate the visibility of any thermal noise. These show the reduction in noise speckling with LENR activated, and the clean result with the Z6. At small size you’llย likely see nothing butย black!
For deep-sky imaging a common practice is to shoot โdark frames,โ images recording just the thermal noise that can then be subtracted from the image.ย
The Long Exposure Noise Reduction feature offered by all cameras performs this dark frame subtraction internally and automatically by the camera for any exposures over one second long.ย
I tested the Z6โs LENR and found it worked well, doing the job to effectively reduce thermal noise (hot pixels) without adding any other artifacts.ย
The rear screen “i” menu as I had it customized for my testing, with functions for astrophotography such as LENR assigned to the 12 boxes.
NOTE:
Some astrophotographers dismiss LENR and never use it. By contrast, I prefer to use LENR to do dark frame subtraction. Why? Through many comparison tests over the years I have found that separate dark frames taken later at night rarely do as good a job as LENR darks, because those separate darks are taken when the sensor temperature, and therefore the noise levels, are different than they were for the โlightโ frames.ย
I’ve found that dark frames taken later, then subtracted โin postโ inevitably show less or little effect compared to images taken with LENR darks. Or worse, they add a myriad of pock-mark black specks to the image, adding noise and making the image look worse.
The benefit of LENR is lower noise. The penalty of LENR is that each image takes twice as long to shoot โ the length of the exposure + the length of the dark frame. Because โฆ
As Expected on the Z6 โฆ Thereโs no LENR Dark Frame Buffer
Only Canon full-frame cameras offer this little known but wonderful feature for astrophotography. Turn on LENR and it is possible to shoot three (with the Canon 6D MkII) or four (with the Canon 6D) raw images in quick succession even with LENR turned on. The Canon 5D series also has this feature.ย
The single dark frame kicks in and locks up the camera only after the series of โlight framesโ are taken. This is excellent for taking a set of noise-reduced deep-sky images for later stacking without need for further โimage calibration.โย
No Nikon has this dark frame buffer, not even the โastronomicalโ D810a. And not the Z6.
ANOTHER NOTE:ย
I have to mention this every time I describe Canonโs dark frame buffer: It works only on full-frame Canons, and thereโs no menu function to activate it. Just turn on LENR, fire the shutter, and when the first exposure is complete fire the shutter again. Then again for a third, and perhaps a fourth exposure. Only then does the LENR dark frame lock up the camera as โBusyโ and prevent more exposures. That single dark frame gets applied to each of the previous โlightโ frames, greatly reducingย the time it takes to shoot a set of dark-frameย subtracted images.ย
But do note that Canon’s dark frame buffer will not work if…:
a) You leave Live View on. Don’t do that for any long exposure shooting.
b) You control the camera through the USB port via external software. It works only when controlling the camera via its internal intervalometer or via the shutter port using a hardware intervalometer.
Sensor Illuminationย
A single 4-minute exposure of Messier 35 in moonlight at ISO 400 with the Z6 and 105mm apo refractor, with no flat fielding or lens correction applied, showing the clean edges and lack of amp glows. The darkening of the corners is inherent in the telescope optical system and is not from the camera.
With DSLRs deep-sky images shot through telescopes, then boosted for contrast in processing, usually exhibit a darkening along the bottom of the frame. This is caused by the upraised mirror shadowing the sensor slightly, an effect never noticed in normal photography.ย
Mirrorless cameras should be free of this mirror box shadowing. The Sony a7III, however, still exhibits some edge shadows due to an odd metal mask in front of the sensor. It shouldnโt be there and its edge darkening is a pain to eliminate in the final processing.ย
As I show in my review of the a7III, the Sony also exhibits a purple edge glow in long-exposure deep-sky images, from an internal light source. Thatโs a serious detriment to its use in deep-sky imaging.
Happily, the Z6 proved to be free of any such artifacts. Images are clean and evenly illuminated to the edges, as they should be. I saw no amp glows or other oddities that can show up under astrophotography use. The Z6 can produce superb deep-sky images.ย
Red Sensitivity
Messer 97 planetary nebula and Messier 108 galaxy in a lightly processed single 4-minute exposure at ISO 1600 with the 105mm refractor, again showing a clean field. The glow at top right is from a Big Dipper star just off the edge of the field.
During my short test period, I was not able to shoot red nebulas under moonless conditions. So I canโt say how well the Z6 performs for recording H-alpha regions compared to other โstockโ cameras.ย
However, I would not expect it to be any better, nor worse, than the competitors. Indeed, the stock Nikon D750 I have does a decent job at picking up red nebulas, though nowhere near as well as Nikonโs sadly discontinued D180a. See my blog post from 2015 for an example shot with that camera.ย
With the D810a gone, if it is deep red nebulosity you are after with a Nikon, then consider buying a filter-modified Z6 or having yours modified.ย
Both LifePixel and Spencerโs Cameraย offer to modify the Z6 and Z7 models. However, I have not used either of their services, so cannot vouch for them first hand.ย
Live View Focusing and Framingย
An image of the back of the camera with a scene under moonlight, with the Z6 set to the highest ISO speed in the movie mode, to aid framing the scene at night.
For all astrophotography manually focusing with Live View is essential.ย And with mirrorless cameras there is no optical viewfinder to look through to frame scenes. You are dependent on the liveย electronic image (on the rear LCD screen or in the eye-level electronic viewfinder, or EVF) for seeing anything.
Thankfully, the Z6 presents a bright Live View image making it easy to frame, find, and focus on stars. Maximum zoom for precise focusing is 15x, good but not as good as the D750โs 20x zoom level, but better than Canonโs 10x maximum zoom in Live View.ย
The Z6 lacks the a7IIIโs wonderful Bright Monitoring function that temporarily ups the ISO to an extreme level, making it much easier to frame a dark night scene. However, something similar can be achieved with the Z6 by switching it temporarily to Movie mode, and having the ISO set to an extreme level.
As with most Nikons (and unlike Sonys), the Z6 remembers separate settings for the still and movie modes, making it easy to switch back and forth, in this case for a temporarily brightened Live View image to aid framing.ย
Thatโs very handy, and the Z6 works better than the D750 in this regard, providing a brighter Live View image, even with the D750โs well-hidden Exposure Preview option turned on.ย
Video Capabilityย
Comparing the three cameras using 1/25-second still frames grabbed from moonlit night movies (HD with the D750 and 4K with the Z6 and a7III) shot at ISO 51200, plus a similarly exposed frame from the a7III shot with a shutter speed of only 1/4 second allowing the slower ISO of 8000.
Where the Z6 pulls far ahead of the otherwise similar D750 is in its movie features.
The Z6 can shoot 4K video (3840 x 2160 pixels) at either 30, 25, or 24 frames per second. Using 24 frames per second and increasing the ISO to between 12,800 to 51,200 (the Z6 can go as high as ISO 204,800!) it is possible to shoot real-time video at night, such as of auroras.
But the auroras will have to be bright, as at 24 fps, the maximum shutter speed is 1/25-second, as you might expect.ย
The a7III, by comparison, can shoot 4K movies at โdraggedโ shutter speeds as slow as 1/4 second, even at 24 fps, making it possible to shoot auroras at lower and less noisy ISO speeds, albeit with some image jerkiness due to the longer exposures per frame.ย
The D750 shoots only 1080 HD and, as shown above, produces very noisy movies at ISO 25,600 to 51,200.ย It’s barely usable for aurora videos.
The Z6 is much cleaner than the D750 at those high ISOs, no doubt due to far better internal processing of the movie frames. However, if night-sky 4K videos are an important goal, a camera from the Sony a7 series will be a better choice, if only because of the option for slower dragged shutter speeds.
For examples of real-time auroras shot with the Sony a7III see my music videos shot in Yellowknife and in Norway.ย
Battery Life
The Z6 uses the EN-EL15b battery compatible with the battery and charger used for the D750. But the โbโ variant allows for in-camera charging via the USB port.ย
In room temperature tests the Z6 lasted for 1500 exposures, as many as the D750 was able to take in a side-by-side test. That was with the screens off.
At night, in winter temperatures of -10 degrees C (14ยฐ F), the Z6 lasted for three hours worth of continuous shooting, both for long deep-sky exposure sets and for a test time-lapse I shot, shown below.ย
A time-lapse movie,ย downsized here to HD from the full-size originals, shot with the Z6 and its internal intervalometer, from twilight through to moonrise on a winter night.ย Processed with Camera Raw and LRTimelapse.ย
However, with any mirrorless camera, you can extend battery life by minimizing use of the LCD screen and eye-level EVF. The Z6 has a handy and dedicated button for shutting off those screens when they arenโt needed during a shoot.
The days of mirrorless cameras needing a handful of batteries just to get through a few hours of shooting are gone.ย
Lens and Telescope Compatibilityย
A 14mm Sigma Art lens with the Nikon FTZ lens adapter needed to attach any “legacy” F-mount lens to the Z6.
As with all mirrorless cameras, the Nikon Z cameras use a new lens mount, one that is incompatible with the decades-old Nikon F mount.ย
The Z mount is wider and can accommodate wider-angle and faster lenses than the old F mount ever could, and in a smaller package. While we have yet to see those lenses appear, in theory thatโs the good news.
The bad news is that youโll need Nikonโs FTZ lens adapter to use any of your existing Nikon F-mount lenses on either the Z6 or Z7. As of this writing, Nikon is supplying an FTZ free with every Z body purchase.ย
I got an FTZ with my loaner Z6 and it worked very well, allowing even third-party lenses like my Sigma Art lenses to focus at the same point as they normally do (not true of some thIrd-party adapters), preserving the lensโs optical performance. Autofocus functions all worked fine and fast.
The FTZ adapter needed to attach the Z6 to a telescope camera adapter (equipped with a standard Nikon T-ring) and field flattener lens for a refractor.
Youโll also need the FTZ adapter for use on a telescope, as shown above, to go from your telescopeโs camera adapter, with its existing Nikon T-ring, to the Z6 body.ย
The reason is that the field flattener or coma corrector lenses often required with telescopes are designed to work best with the longer lens-to-sensor distance of a DSLR body. The FTZ adapter provides the necessary spacing, as do third-party adapters.ย
The FTZ lens adapter has its own tripod foot, useful for balancing front-heavy lenses like the big Sigma here.
The only drawback to the FTZ is that any tripod plate attached to the camera body itself likely has to come off, and the tripod foot incorporated into the FTZ used instead. I found myself often having to swap locations for the tripod plate, an inconvenience.ย
Camera Controller Compatibilityย
The port side of the Z6, with the DC2 shutter remote jack at bottom, and HDMI and USB-C ports above. There’s also a mic and headphone jack for video use.
Since it uses the same Nikon-type DC2 shutter port as the D750, the Z6 it should be compatible with most remote hardware releases and time-lapse motion controllers that operate a Nikon through the shutter port. An example are the controllers from SYRP.
On the other hand, time-lapse devices and external intervalometers that run Nikons through the USB port might need to have their firmware or apps updated to work with the Z6.
For example, as of early May 2019, CamRanger lists the Z6 as a supported camera; the Arsenal โsmart controllerโ does not. Nor does Alpine Labs for their Radian and Pulse controllers, nor TimeLapse+ for its excellent View bramping intervalometer. Check with your supplier.
For those who like to use laptops to run their camera at the telescope, I found the Windows program Astro Photography Tool (v3.63) worked fine with the Z6, in this case connecting to the cameraโs USB-C port using the USB-C to USB-A cable that comes with the camera. This allows APT to shift not only shutter speed, but also ISO and aperture under scripted sequences.ย
However, BackyardNikon v2.0, current as of April 2019, does not list the Z6 as a supported camera.ย
Raw File Compatibilityย
A Z6 Raw NEF file open in Raw Therapee 5.6, showing good star images and de-Bayering.
Inevitably, raw files from brand new cameras cannot be read by any raw developer programs other than the one supplied by the manufacturer, Nikon Capture NX in this case. However, even by the time I did my testing in winter 2019 all the major software suppliers had updated their programs to open Z6 files.ย
Adobe Lightroom and Photoshop, Affinity Photo, DxO PhotoLab, Luminar 3, ON1 PhotoRAW, and the open-source Raw Therapee all open the Z6โs NEF raw files just fine.ย
PixInsight 1.8.6 failing to open a Z6 raw NEF file.
Specialized programs for processing astronomy images might be another story. For example, as of v1.08.06, PixInsight, a favourite program among astrophotographers, does not open Z6 raw files. Nor does Nebulosity v4. But check with the developers for updates.ย
Other Features for Astrophotographyย
Here are other Nikon Z6 features I found of value for astrophotography, and for operating the camera at night.ย
Tilting LCD Screenย
Like the Nikon D750 and Sony A7III, the Z6 offers a tilting LCD screen great for use on a telescope or tripod when aimed up at the sky. However, the screen does not flip out and reverse, a feature useful for vloggers, but seldom needed for astrophotography.ย
Showing the top OLED screen and dedicated ISO button that is easy to access in the dark. It works in conjunction with the top dial.
OLED Top Screen (Above)
The Sony doesnโt have one, and Canonโs low-cost mirrorless Rp also lacks one. But the top-mounted OLED screen of the Z6 is a great convenience for astrophotography. It makes it possible to monitor camera status and battery life during a shoot, even with the rear LCD screen turned off to prolong battery life.
Touch Screenย
Sonyโs implementation of touch-screen functions is limited to just choosing autofocus points. By contrast, the Nikon Z6 offers a full range of touchscreen functions, making it easy to navigate menus and choose settings.ย
I do wish there was anย option, as there is with Pentax, to tint the menus red for preserving night vision.
Built-in Intervalometer
As with other Nikons, the Z6 offers an internal intervalometer capable of shooting time-lapses, just as long as individual exposures donโt need to be longer than 30 seconds.ย
In addition, thereโs the Exposure Smoothing option which, as I have found with the D750, is great for smoothing flickering in time-lapses shot using auto exposure.ย
Sony has only just added an intervalometer to the a7III with their v3 firmware update, but with no exposure smoothing.ย
Custom i Menu / Custom Function Buttonsย
The Sony a7III has four custom function buttons users can assign to commonly used commands, for quick access. For example, I assign one Custom button to the Bright Monitoring function which is otherwise utterly hidden in the menus, but superb for framing nightscapes, if only you know itโs there!ย
The Nikon Z6 has two custom buttons beside the lens mount. However, I found it easier to use the โiโ menu (shown above) by populating it with those functions I use at night for astrophotography. Itโs then easy to call them up and adjust them on the touch screen.
Thankfully, the Z6โs dedicated ISO button is now on top of the camera, making it much easier to find at night than the awkwardly placed ISO button on the back of the D750, which I am always mistaking for the Image Quality button, which you do not want to adjust by mistake.ย
My Menuย
As most cameras do, the Z6 also has a โMy Menuโ page which you can also populate with favourite menu commands.ย
The D750 (left) compared to the smaller and lighter Z6 (right). This shows the wider Z lens mount compared to Nikon’s old F-mount standard.
Lighter Weight / Smaller Size
The Z6 provides similar imaging performance, if not better (for movies) than the D750, and in a smaller and lighter camera, weighing 200 grams (0.44 pounds) less than the D750.ย Being able to downsize my equipment mass is a welcome plus to going mirrorless.
Extreme 800% blow-ups of the Moon show a slightly sharper image with the Z6 set to Silent Shutter.
Electronic Front Curtain Shutter / Silent Shootingย
By design, mirrorless cameras lack any vibration from a bouncing mirror. But even the mechanical shutter can impart vibration and blurring to high-magnification images taken through telescopes.ย
The electronic front curtain shutter (lacking in the D750) helps eliminate this, while the Silent Shooting mode does just that โ it makes the Z6 utterly quiet and vibration free when shooting, as all the shutter functions are now electronic. This is great for lunar and planetary imaging.ย
Whatโs Missing for Astrophotography (not much!)
Bulb Timer for Long Exposures
While the Z6 has a Bulb setting, there is no Bulb Timer as there is with Canonโs recent cameras. A Bulb Timer would allow setting long Bulb exposures of any length in the camera, though Canon’s cannot be combined with the intervalometer.ย
Instead, the Nikon must be used with an external Intervalometer for any exposures over 30 seconds long. Any number of units are compatible with the Z6, through its shutter port which is the same type DC2 jack used in the D750.
In-Camera Image Stackingย to Raws
The Z6 does offer the ability to stack up to 10 images in the camera, a feature also offered by Canon and Pentax. Images can be blended with a Lighten (for star trails) or Average (for noise smoothing) mode.ย
However, unlike with Canon and Pentax, the result is a compressed JPG not a raw file, making this feature of little value for serious imaging. Plus with a maximum of only 10 exposures of up to 30-seconds each, the ability to stack star trails โin cameraโ is limited.ย
Illuminated Buttonsย
Unlike the top-end D850, the Z6โs buttons are not illuminated, but then again neither are the Z7โs.
As a bonus โ the Nikon 35mm S-Series Lens
The upper left frame corner of a tracked star image shot with the 35mm S lens wide open at f/1.8 and stopped down at third stop increments.
With the Z6 I also received a Nikkor 35mm f/1.8 S lens made for the Z-mount, as the lens perhaps best suited for nightscape imaging out of the native Z-mount lenses from Nikon. See Nikon’s website for the listing.ย
If thereโs a downside to the Z-series Nikons itโs the limited number of native lenses that are available now from Nikon, and likely in the future from anyone, due to Nikon not making it easy for other lens companies to design for the new Z mount.ย
In testing the 35mm Nikkor on tracked shots, stars showed excellent on- and off-axis image quality, even wide open at f/1.8. Coma, astigmatism, spherical aberration, and lateral chromatic aberration were all well controlled.ย
However, as with most lenses now offered for mirrorless cameras, the focus is โby-wireโ using a ring that doesnโt mechanically adjust the focus. As a result, the focus ring turns continuously and lacks a focus scale.ย
So it is not possible to manually preset the lens to an infinity mark, as nightscape photographers often like to do. Focusing must be done each night.ย
Until there is a greater selection of native lenses for the Z cameras, astrophotographers will need to use the FTZ adapter and their existing Nikon F-mount or third-party Nikon-mount lenses with the Zs.
Recommendationsย
I was impressed with the Z6.ย
The Owl Nebula, Messier 97, a planetary nebula in our galaxy, and the edge-on spiral galaxy Messier 108, paired below the Bowl of the Big Dipper in Ursa Major. This is a stack of 5 x 4-minute exposures at ISO 1600 with the Nikon Z6 taken as part of testing. This was through the Astro-Physics Traveler refractor at f/6 with the Hotech field flattener and FTZ adapter.
For any owner of a Nikon cropped-frame DSLR (from the 3000, 5000, or 7000 series for example) wanting to upgrade to full-frame for astrophotography I would suggest moving to the Z6 over choosing a current DSLR.ย
Mirrorless is the way of the future. And the Z6 will yield lower noise than most, if not all, of Nikonโs cropped-frame cameras.
The Z6 with the Nikkor 35mm f/1.8 S lens native for the Z mount.
For owners of current Nikon DSLRs, especially a 24-megapixel camera such as the D750, moving to a Z6 will not provide a significant improvement in image quality for still images.ย
But … it will provide 4K video and much better low-light video performance than older DSLRs. So if it is aurora videos you are after, the Z6 will work well, though not quite as well as a Sony alpha.ย
In all, thereโs little downside to the Z6 for astrophotography, and some significant advantages: low noise, bright live view, clean artifact-free sensor images, touchscreen convenience, silent shooting, low-light 4K video, all in a lighter weight body than most full-frame DSLRs.ย
I highly recommend the Nikon Z6.ย
โ Alan, April 30, 2019 / ยฉ 2019 Alan Dyer / AmazingSky.comย
It was a magical night as the rising Moon lit the Badlands with a golden glow.
When doing nightscape photography it’s often best not to fight the Moon, but to embrace it and use it as your light source.
I did this on a fine night, Easter Sunday, at one of my favourite nightscape spots, Dinosaur Provincial Park.
I set up two cameras to frame different views of the hoodoos as they lit up with the light of the rising waning Moon.
The night started out as a dark moonless evening as twilight ended. Then about 90 minutes after the arrival of darkness, the sky began to brighten again as the Moon rose to illuminate the eroded formations of the Park.
The formations of Dinosaur Provincial Park, Alberta, lit by the rising gibbous Moon, off camera at left, on April 21/22, 2019. This is looking west, with the stars of the winter sky setting. Procyon is at right. Aphard in Hydra is above the hill. This is a stack of 8 exposures, mean combined to smooth noise, for the ground, and a single exposure for the sky, all with the 24mm Sigma Art lens at f/5.6 and Nikon D750 at ISO 6400, each for 25 seconds. The images were from the end of a sequence shot for a time-lapse using the TimeLapse+ View intervaolometer.ย
This was a fine example of “bronze hour” illumination, as some have aptly called it.
Photographers know about the “golden hour,” the time just before sunset or just after sunrise when the low Sun lights the landscape with a golden glow.
The Moon does the same thing, with a similar tone, though greatly reduced in intensity.
The low Moon, especially just after Full, casts a yellow or golden tint over the scene. This is caused by our atmosphere absorbing the “cold” blue wavelengths of moonlight, and letting through the “warm” red and yellow tones.
Making use of the rising (or setting) Moon to light a scene is one way to capture a nightscape lit naturally, and not with artificial lights, which are increasingly being frowned upon, if not banned at popular nightscape destinations.
A screen shot from the desktop app Starry Night (by Simulation Curriculum) showing the waning gibbous Moon rising in the SE on April 21. Such “planetarium” apps are useful for simulating the sky of a planned shoot.
“Bronze hour” lighting is great in still-image nightscapes. But in time-lapses the effect is more striking โ indeed, in time-lapse lingo it is called a “moonstrike” scene.
The dark landscape suddenly lights up as if it were dawn, yet stars remain in the sky.
A screen shot of a planning app that is a favourite of mine, The Photographer’s Ephemeris, set up to show the scene for moonrise on April 21 from the Park.
The best nights for such a moonstrike are ones with a waning gibbous or last quarter Moon. At these phases the Moon rises after sunset, to re-light a scene after evening twilight has faded.
On April 21 I made use of such a circumstance to shoot moonstrike stills and movies, not only for their own sake, but for use as illustrations in the next edition of my Nightscapes and Time-lapse eBook (at top here).
One camera, the Nikon D750, I coupled with a device called a bramping intervalometer, in this case the TimeLapse+ View, shown above. It works great to automatically shift the shutter and ISO speeds as the sky darkens then brightens again.
Yes, in bright situations the camera’s own Auto Exposure and Auto ISO modes might accomplish this.
But … once the sky gets dark the Auto circuits fail and you’re left with hugely underexposed images.
The TimeLapse+ View, with its more sensitive built-in light meter, can track right through into full darkness, making it possible to shoot so-called “holy grail” time-lapses that go from daylight to darkness, from sunset to the Milky Way, all shot unattended.
The eroding formations of Dinosaur Provincial Park, Alberta, lit by the rising gibbous Moon, off camera at right, on April 21/22, 2019. This is looking north, with Polaris at upper centre, Capella setting at left, Vega rising at right, and the W of Cassiopeia at lower centre. This is a stack of 8 exposures, mean combined to smooth noise, for the ground, and one exposure from that set for the sky. All with the 15mm Laowa lens at f/2.8 and Sony a7III at ISO 3200, each for 30 seconds. ย
For the other camera, the Sony a7III (with the Laowa 15mm lens I just reviewed) I set the camera manually, then shifted the ISO and shutter speed a couple of times to accommodate the darkening, then brightening of the scene.
Processing the resulting RAW files in the highly-recommended program LRTimelapse smoothed out all the jumps in brightness to make a seamless transition.
I also used the new intervalometer function that Sony has just added to the a7III with its latest firmware update. Hurray! I complained about the lack of an intervalometer in my original review of the Sony a7III. But that’s been fixed.
This is looking north, with the stars of the northern sky pivoting around Polaris. This is a stack of 8 exposures, mean combined to smooth noise, for the ground, and 250 exposures for the sky, blended with Lighten mode to create the stails. However, I used the Advanced Stacker Plus actions in Photoshop to do the stacking, creating the tapering effect in the process. All exposures with the 15mm Laowa lens at f/2.8 and Sony a7III at ISO 3200, each for 30 seconds.ย
I shot 425 frames with the Sony, which I not only turned into a movie but, as one can with time-lapse frames, I also stacked into a star trail still image, in this case looking north to the circumpolar stars.
I prefer this action set over dedicated programs such as StarStaX, because it works directly with the developed Raw files. There’s no need to create a set of JPGs to stack, compromising image quality, and departing from the non-destructive workflow I prefer to maintain.
While the still images are very nice, the intended final result was this movie above, a short time-lapse vignette using clips from both cameras. Do watch in HD.
I rendered out the frames from the Sony both as a “normal” time-lapse, and as one with accumulating star trails, again using the Advanced Stacker Plus actions to create the intermediate frames for assembling into the movie.
All these techniques, gear, and apps are explained in tutorials in my eBook, above. However, it’s always great to get a night perfect for putting the methods to work on a real scene.
โ Alan, April 27, 2019 / ยฉ 2019 Alan Dyer / AmazingSky.com
I test out a fast and very wide lens designed specifically for Sony mirrorless cameras.ย
In a previous test I presented results on how well the Sony a7III mirrorless camera performs for nightscape and deep-sky photography. It works very well indeed.
But what about lenses for the Sony? Here’s one ideal for astrophotography.
TL;DR Conclusions
Made for Sony e-mount cameras, the Venus Optics 15mm f/2 Laowa provides excellent on- and off-axis performance in a fast and compact lens ideal for nightscape, time-lapse, and wide-field tracked astrophotography with Sony mirrorless cameras. (UPDATE: Venus Optics has announced versions of this lens for Canon R and Nikon Z mount mirrorless cameras.)
I use it a lot and highly recommend it.
Size and Weight
While I often use the a7III with my Canon lenses by way of a Metabones adapter, the Sony really comes into its own when matched to a “native” lens made for the Sony e-mount. The selection of fast, wide lenses from Sony itself is limited, with the new Sony 24mm G-Master a popular favourite (I have yet to try it).
However, for much of my nightscape shooting, and certainly for auroras, I prefer lenses even wider than 24mm, and the faster the better.
Aurora over Bรฅtsfjord, Norway. This is a single 0.8-second exposure at f/2 with the 15mm Venus Optics lens and Sony a7III at ISO 1600.
The Laowa 15mm f/2 from Venus Optics fills the bill very nicely, providing excellent speed in a compact lens. While wide, the Laowa is a rectilinear lens providing straight horizons even when aimed up, as shown above. This is not a fish-eye lens.
Though a very wide lens, the 15mm Laowa accepts standard 72mm filters. The metal lens hood is removable. ยฉ 2019 Alan Dyer
The Venus Optics 15mm realizes the potential of mirrorless cameras and their short flange distance that allows the design of fast, wide lenses without massive bulk.
Sigma 14mm f/1.8 Art lens (for Nikon mount) vs. Venus Optics 15mm f/2 lens (for Sony mount). ยฉ 2019 Alan Dyer
While compact, at 600 grams the Laowa 15mm is quite hefty for its size due to its solid metal construction. Nevertheless, it is half the weight of the massive 1250-gram Sigma 14mm f/1.8 Art. The Laowa is not a plastic entry-level lens, nor is it cheap, at $850 from U.S. sources.
For me, the Sony-Laowa combination is my first choice for a lightweight travel camera for overseas aurora trips
The lens mount showing no electrical contacts to transfer lens metadata to the camera. ยฉ 2019 Alan Dyer
However, this is a no-frills manual focus lens. Nor does it even transfer aperture data to the camera, which is a pity. There are no electrical connections between the lens and camera.
However, for nightscape work where all settings are adjusted manually, the Venus Optics 15mm works just fine. The key factor is how good are the optics. I’m happy to report that they are very good indeed.
Testing Under the Stars
To test the Venus Optics lens I shot “same night” images, all tracked, with the Sigma 14mm f/1.8 Art lens, at left, and the Rokinon 14mm SP (labeled as being f/2.4, at right). Both are much larger lenses, made for DSLRs, with bulbous front elements not able to accept filters. But they are both superb lenses. See my test report on these lenses published in 2018.
The Sigma 14mm f/1.8 Art lens (left) vs. the Rokinon SP 14mm f/2.4. ยฉ 2019 Alan Dyer
The next images show blow-ups of the same scene (the nightscape shown in full below, taken at Dinosaur Provincial Park, Alberta), and all taken on a tracker.
I used the Rokinon on the Sony a7III using the Metabones adapter which, unlike some brands of lens adapters, does not compromise the optical quality of the lens by shifting its focal position. But lacking a lens adapter for Nikon-to-Sony at the time of testing, I used the Nikon-mount Sigma lens on a Nikon D750, a DSLR camera with nearly identical sensor specs to the Sony.
Vignetting
A tracked image with the Venus Optics Laowa 15mm at f/2. Click or tap on an image to download a full-resolution JPG for closer inspection.
Above is a tracked image (so the stars are not trailed, which would make it hard to tell aberrations from trails), taken wide open at f/2. No lens correction has been applied so the vignetting (the darkening of the frame corners) is as the lens provides.
As shown above, when used wide open at f/2 vignetting is significant, but not much more so than with competitive lenses with much larger lenses, as I compare below.
And the vignetting is correctable in processing. Adobe Camera Raw and Lightroom have this lens in their lens profile database. That’s not the case with current versions (as of April 2019) of other raw developers such as DxO PhotoLab, ON1 Photo RAW, and Raw Therapee where vignetting corrections have to be dialled in manually by eye.
A tracked image with the Venus Optics Laowa 15mm stopped down 1 stop to f/2.8.
When stopped down to f/2.8 the Laowa “flattens” out a lot for vignetting and uniformity of frame illumination. Corner aberrations also improve but are still present. I show those in close-up detail below.
15mm Laowa vs. Rokinon 14mm SP vs. Sigma Art 14mm โย Comparing the left side of the image for vignetting (light fall-off), wide open and stopped down. ยฉ2018 Alan Dyer
Above, I compare the vignetting of the three lenses, both wide open and when stopped down. Wide open, all the lenses,ย even the Sigma and Rokinon despite their large front elements, show quite a bit of drop off in illumination at the corners.
The Rokinon SP actually seems to be the worst of the trio, showing some residual vignetting even at f/2.8, while it is reduced significantly in the Laowa and Sigma lenses. Oddly, the Rokinon SP, even though it is labeled as f/2.4, seemed to open to f/2.2, at least as indicated by the aperture metadata.
On-Axis Performance
15mm Laowa vs. Rokinon 14mm SP vs. Sigma Art 14mm โย Comparing the centre of the image for sharpness, wide open and stopped down. Click or tap on an image to download a full-resolution JPG for closer inspection. ยฉ 2018 Alan Dyer
Above I show lens sharpness on-axis, both wide open and stopped down, to check for spherical and chromatic aberrations with the bright blue star Vega centered. The red box in the Navigator window at top right indicates what portion of the frame I am showing, at 200% magnification in Photoshop.
On-axis, the Venus Optics 15mm shows stars just as sharply as the premium Sigma and Rokinon lenses, with no sign of blurring spherical aberration nor coloured haloes from chromatic aberration.
ย This is where this lens reaches sharpest focus on stars, just shy of the Infinity mark. ยฉ 2019 Alan Dyer
Focusing is precise and easy to achieve with the Sony on Live View. My unit reaches sharpest focus on stars with the lens set just shy of the middle of the infinity symbol. This ย is consistent and allows me to preset focus just by dialing the focus ring, handy for shooting auroras at -35ยฐ C, when I prefer to minimize fussing with camera settings, thank you very much!
Off-Axis Performance
15mm Laowa vs. Rokinon 14mm SP vs. Sigma Art 14mm โย Comparing the centre of the image for sharpness, wide open and stopped down. Click or tap on an image to download a full-resolution JPG for closer inspection. ยฉ 2018 Alan Dyer15mm Laowa vs. Rokinon 14mm SP vs. Sigma Art 14mm โย Comparing the upper right corner of the image for aberrations, wide open and stopped down. ยฉ 2018 Alan Dyer
The Laowa and Sigma lenses show similar levels of off-axis coma and astigmatism, with the Laowa exhibiting slightly more lateral chromatic aberration than the Sigma. Both improve a lot when stopped down one stop, but aberrations are still present though to a lesser degree.
However, I find that the Laowa 15mm performs as well as the Sigma 14mm Art for star quality on- and off-axis. And that’s a high standard to match.
The Rokinon SP is the worst of the trio, showing significant elongation of off-axis star images (they look like lines aimed at the frame centre), likely due to astigmatism. With the 14mm SP, this aberration was still present at f/2.8, and was worse at the upper right corner than at the upper left corner, an indication to me that even the premium Rokinon SP lens exhibits slight lens de-centering, an issue users have often found with other Rokinon lenses.
Real-World Examples โ The Milky Way
This is a stack of 8 x 2-minute exposures with the Venus Optics Laowa 15mm lens at f/2 and Sony a7III at ISO 800, on the Sky-Watcher Star Adventurer tracker. A single exposure taken through the Kenko Softon A filter layered in with Lighten mode adds the star glows, though exaggerates the lens distortion on the bright stars.This is a stack of 12 exposures for the ground, mean combined to smooth noise, and one exposure for the sky, all 30 seconds at f/2 with the Laowa 15mm lens on the Sony a7III camera at ISO 6400. These were the last frames in a 340-frame time-lapse sequence.
The fast speed of the Laowa 15mm is ideal for shooting tracked wide-field images of the Milky Way, and untracked camera-on-tripod nightscapes and time-lapses of the Milky Way.
Image aberrations are very acceptable at f/2, a speed that allows shutter speed and ISO to be kept lower for minimal star trailing and noise while ensuring a well-exposed frame.
Real World Examples โ Auroras
Aurora over the Churchill Northern Studies Centre, Churchill, Manitoba. This is 6 seconds at f/2 with the 15mm Venus Optic lens and Sony a7III at ISO 3200.Aurora from near Yellowknife, NWT, September 8, 2018. This is 2.5-seconds at f/2 with the Venus Optics 15mm lens and Sony a7IIII at ISO 3200.The Northern Lights from at sea when leaving the Lofoten Islands, Norway heading toward the mainlaind, from Stamsund to Bodo, March 3, 2019. This was from the Hurtigruten ship the ms Trollfjord. This is a single 1-second exposure for at f/2 with the 15mm Venus Optics lens and Sony a7III at ISO 6400.
Where the Laowa 15mm really shines is for auroras. On my trips to chase the Northern Lights I often take nothing but the Sony-Laowa pair, to keep weight and size down.
Above is an example, taken from a moving ship off the coast of Norway. The fast f/2 speed (I wish it were even faster!) makes it possible to capture the Lights in only 1- or 2-second exposures, albeit at ISO 6400. But the fast shutter speed is needed for minimizing ship movement.
Video Links
The Sony also excels at real-time 4K video, able to shoot at ISO 12,800 to 51,200 without excessive noise.
Aurora Reflections from Alan Dyer on Vimeo.
The Sky is Dancing from Alan Dyer on Vimeo.
The Northern Lights At Sea from Alan Dyer on Vimeo.
Click through to see the posts and the videos shot with the Venus Optics 15mm.
As an aid to video use, the aperture ring of the Venus Optics 15mm can be “de-clicked” at the flick of a switch, allowing users to smoothly adjust the iris during shooting, avoiding audible clicks and jumps in brightness. That’s a very nice feature indeed.
In all, I can recommend the Venus Optics Laowa 15mm lens as a great match to Sony mirrorless cameras, for nightscape still and video shooting. UPDATE: Versions for Canon R and Nikon Z mount mirrorless cameras will now be available.
โ Alan, April 20, 2019 / ยฉ 2019 Alan Dyer / AmazingSky.com
For two magical nights I was able to capture the Rockies by moonlight, with the brilliant stars of winter setting behind the mountains.
I’ve been waiting for nights like these for many years! I consider this my “25-Year Challenge!”
Back during my early years of shooting nightscapes I was able to capture the scene of Orion setting over Lake Louise and the peaks of the Continental Divide, with the landscape lit by the Moon.
Such a scene is possible only in late winter, before Orion sets out of sight and, in March, with a waxing gibbous Moon to the east to light the scene but not appear in the scene. There are only a few nights each year the photograph is possible. Most are clouded out!
Orion over Lake Louise, Banff National Park, Alberta March 1995 at Full Moon 28mm lens at f/2.8 Ektachrome 400 slide film
Above is the scene in March 1995, in one of my favourite captures on film. What a night that was!
But it has taken 24 years for my schedule, the weather, and the Moon phase to all align to allow me to repeat the shoot in the digital age. Thus the Challenge.
Here’s the result.
Orion setting over the iconic Victoria Glacier at Lake Louise, with the scene lit by the light of the waxing Moon, on March 19, 2019. This is a panorama of 3 segments stitched with Adobe Camera Raw, each segment 8 seconds at f/3.5 with the Sigma 24mm Art lens and Nikon D750 at ISO 800.
Unlike with film, digital images make it so much easier to stitch multiple photos into a panorama.
In the film days I often shot long single exposures to produce star trails, though the correct exposure was an educated guess factoring in variables like film reciprocity failure and strength of the moonlight.
Below is an example from that same shoot in March 1995. Again, one of my favourite film images.
Orion setting over Mount Temple, near Lake Louise, Banff National park, Alberta. March 1995. On Ektachrome 100 slide film, with a 28mm lens at f/8 for a roughly 20 minute exposure. Full moonlight provides the illumination
This year, time didn’t allow me to shoot enough images for a star trail. In the digital age, we generally shoot lots of short exposures to stack them for a trail.
Instead, I shot this single image of Orion setting over Mt. Temple.
The winter stars of Orion (centre), Canis Major (left) and Taurus (upper right) over Mt. Temple in Banff National Park. This is from the Morantโs Curve viewpoint on the Bow Valley Parkway, on March 19, 2019. Illumination is from moonlight from the waxing gibbous Moon off frame to the left. This is a single 8-second exposure at f/3.2 with the 24mm Sigma Art lens and Nikon D750 at ISO 800.
Plus I shot the panorama below, both taken atย Morantโs Curve, a viewpoint named for the famed CPR photographer Nicholas Morant who often shot from here with large format film cameras. Kevin Keefe of Trains magazine wrote a nice blog about Morant.
A panorama of Morantโs Curve, on the Bow River in Banff National Park, with an eastbound train on the CPR tracks under the stars of the winter sky. Illumination is from the 13-day gibbous Moon off frame at left. Each segment is 8 seconds at f/3.2 and ISO 800 with the 24mm Sigma Art lens and Nikon D750 in portrait orientation.
I was shooting multi-segment panoramas when a whistle in the distance to the west alerted me to the oncoming train. I started the panorama segment shooting at the left, and just by good luck the train was in front of me at centre when I hit the central segment. I continued to the right to catch the blurred rest of the train snaking around Morantโs Curve. I was very pleased with the result.
The night before I was at another favourite spot, Two Jack Lake near Banff, to again shoot panoramas of the moonlit scene below the bright stars of the winter sky.
These are the iconic red chairs of Parks Canada, here at frozen Two Jack Lake, Banff National Park, and under the moonlit winter sky. This was March 18, 2019, with the scene illuminated by the gibbous Moon just at the frame edge here. This is a panorama of 11-segments, each 10 seconds at f/4 with the Sigma 24mm Art lens and Nikon D750 at ISO 800.
A run up to the end of the Vermilion Lakes road at the end of that night allowed me to capture Orion and Siris reflected in the open water of the upper lake.
The winter stars setting at Vermilion Lakes in Banff National Park, on March 18, 2019. This is a panorama cropped from a set of 11 images, all with the 24mm Sigma Art lens at f/3.2 for 10 seconds each and the Nikon D750 at ISO 800, in portrait orientation.
Unlike in the film days, today we also have some wonderful digital planning tools to help us pick the right sites and times to capture the scene as we envision it.
This is a screen shot of the PhotoPills app in its “augmented reality” mode, taken by day during a scouting session at Two Jack, but showing where the Milky Way will be later that night in relation to the real “live” scene shot with the phone’s camera.
PhotoPills
The app I like for planning before the trip is The Photographer’s Ephemeris. This is a shot of the plan for the Lake Louise shoot. The yellow lines are the sunrise and sunset points. The thin blue line at lower right is the angle toward the gibbous Moon at about 10 p.m. on March 19.
The Photographer’s Ephemeris
Even better than TPE is its companion program TPE 3D, which allows you to preview the scene with the mountain peaks, sky, and illumination all accurately simulated for your chosen location. I am impressed!
TPE 3D
Compare the simulation above to the real thing below, in a wide 180ยฐ panorama.
A panorama of Lake Louise in winter, in Banff National Park, Alberta, taken under the light of the waxing gibbous Moon, off frame here to the left. This was March 19, 2019. This is a crop from the original 16-segment panorama, each segment with the 24mm Sigma Art lens and Nikon D750, oriented โportrait.โ Each segment was 8 seconds at f/3.2 and ISO 800.
These sort of moonlit nightscapes are what I started with 25 years ago, as they were what film could do well.
These days, everyone chases after dark sky scenes with the Milky Way, and they do look wonderful, beyond anything film could do. I shoot many myself.ย And I include an entire chapter in my ebook above about shooting the Milky Way.
But … there’s still a beauty in a contrasty moonlit scene with a deep blue sky from moonlight, especially with the winter sky and its population of bright stars and constellations.
These are the iconic red chairs of Parks Canada, here on the Tunnel Mountain Drive viewpoint overlooking the Bow River and Mount Rundle, in Banff National Park, and under the moonlit winter sky. This is a panorama cropped from the original 12-segments, each 15 seconds at f/4 with the Sigma 24mm Art lens and Nikon D750 at ISO 800.
I’m glad the weather and Moon finally cooperated at the right time to allow me to capture these magical moonlit panoramas.
โ Alan, March 26, 2019 / ยฉ 2019 Alan Dyer / AmazingSky.com
I’m pleased to announce that my “Nightscapes and Time-Lapses” eBook is now available for all devices as a “universal” PDF!
First published in 2014, and revised several times since then, my How to Photograph and Process Nightscapes and Time-Lapses eBook had been available only for Apple devices through the Apple iBooks Store. Not any more!
Over the years, many people have inquired about an edition for other devices, notably Android and Windows tablets. The only format that I can be sure the wide array of other devices can read and display as I intend it is PDF.
To convert the interactive Apple iBook into a PDF required splitting the content into two volumes:
Volume 1 deals just with Photography in 425 pages.
Volume 2 deals just with Processing, also in 425 pages.
Volume 2 includes all the same step-by-step tutorials as the Apple edition, but spread over many more pages. That’s because the Apple Edition allows “stacking” many processing steps into a one-page interactive gallery.
In the PDF version, however, those same steps are shown over several pages. And there are about 50 processing tutorials, including for selected non-Adobe programs such as Affinity Photo, ON1 Photo RAW, and DxO PhotoLab.
The other main difference is that, unlike the Apple version, I cannot embed videos. So all the videos are provided by links to Vimeo feeds, many “private” so only my ebook owners have access to those videos.
Otherwise, the combined content of the two PDFs is the same as the Apple iBooks edition.
I’ve also updated the Apple iBooks version (to v3.1) to revise the content, and add a few new pages: on Luminosity Mask panel extensions, southern hemisphere Milky Way and Moon charts, and even the new Nikon Z6 camera. It is now 580 pages.
Owners of the previous Apple iBooks edition can get the updated version for free. In iBooks, check under Purchased>Updates.
Both Apple and PDF editions are now in sync and identical in content. I think you’ll find them the most comprehensive works on the subject in print and in digital.
I spent a wonderful week touring the star-filled nightscapes of southwest Saskatchewan.
On their license plates Saskatchewan is billed as the Land of Living Skies. I like the moniker that Saskatchewan singer-songwriter Connie Kaldor gives it โ the sky with nothing to get in the way.
Grasslands National Park should be a mecca for all stargazers. It is a Dark Sky Preserve. You can be at sites in the Park and not see a light anywhere, even in the far distance on the horizon, and barely any sky glows from manmade sources.
The lead image shows the potential for camping in the Park under an amazing sky, an attraction that is drawing more and more tourists to sites like Grasslands.
This is a multi- panel panorama of the Milky Way over the historic 76 Ranch Corral in the Frenchman River Valley, once part of the largest cattle ranch in Canada. Mars shines brightly to the east of the galactic core.
Mars and the Milky Way over the tipis at Two Trees area in Grasslands National Park, Saskatchewan on August 6, 2018. Some light cloud added the haze and glows to the planets and stars. Illumination is by starlight. No light painting was employed here. This is a stack of 8 exposures for the ground, mean combined to smooth noise, and a single untracked exposure for the sky, all 30 seconds at f/2.8 with the Sigma 20mm lens, and Nikon D750 at ISO 6400 with LENR on.
Mars (at left) and the Milky Way (at right) over a single tipi (with another under construction at back) at the Two Trees site at Grasslands National Park, Saskatchewan, August 6, 2018. I placed a low-level warm LED light inside the tipi for the illumination. This is a stack of 6 exposures, mean combined to smooth noise, for the ground, and one untracked exposure for the sky, all 30 seconds at f/2.2 with the 20mm Sigma lens and Nikon D750 at ISO 3200.
The Big Dipper and Arcturus (at left) over a single tipi at the Two Trees site at Grasslands National Park, Saskatchewan, August 6, 2018. This is a stack of 10 exposures, mean combined to smooth noise, for the ground, and one untracked exposure for the sky, all 30 seconds at f/2.8 with the 20mm Sigma lens and Nikon D750 at ISO 6400. Light cloud passing through added the natural star glows, enlarging the stars and making the pattern stand out. No soft focus filter was employed, and illumination is from starlight. No light painting was employed. Some airglow and aurora colour the sky. A Glow filter from ON1 Photo Raw applied to the sky to further soften the sky.
At the Two Trees site visitors can stay in the tipis and enjoy the night sky. No one was there the night I was shooting. The night was warm, windless, and bug-less. It was a perfect summer evening.
From Grasslands I headed west to the Cypress Hills along scenic backroads. The main Meadows Campground in Cypress Hills Interprovincial Park, another Dark Sky Preserve, is home every year to the Saskatchewan Summer Star Party. About 350 stargazers and lovers of the night gather to revel in starlight.
The Perseid meteor shower over the Saskatchewan Summer Star Party, on August 10, 2018, with an aurora as a bonus. The view is looking north with Polaris at top centre, and the Big Dipper at lower left. The radiant point in Perseus is at upper right. The sky also has bands of green airglow, which was more prominent in images taken earlier before the short-lived aurora kicked up. The aurora was not obvious to the naked eye. However, the northern sky was bright all night with the airglow and faint aurora. This is a composite of 10 images, one for the base sky with the aurora and two faint Perseids, and 9 other images, each with Perseids taken over a 3.3 hour period, being the best 9 frames with meteors out of 360. Each exposure was 30 seconds at f/2 with the 15mm Laoawa lens and Sony a7III at ISO 4000. I rotated all the additional meteor image frames around Polaris to align the frames to the base sky image, so that the added meteors appear in the sky in the correct place with respect to the background stars, retaining the proper perspective of the radiant point.
A Perseid meteor streaks down the Milky Way over the Saskatchewan Summer Star Party in the Cypress Hills of southwest Saskatchewan, at Cypress Hills Interprovincial Park, a Dark Sky Preserve. The Milky Way shines to the south. About 350 stargazers attend the SSSP every year. Observers enjoy their views of the sky at left while an astrophotographer attends to his camera control computer at right. This is a single exposure, 25 seconds, with the Laowa 15mm lens at f/2 and Sony a7III camera at ISO 3200.
This year coincided with the annual Perseid meteor shower and we saw lots!
Most nights were clear, and warmer than usual, allowing shirt-sleeve observing. It was a little bit of Arizona in Canada. Everyone enjoyed the experience. I know I did!
SSSP and Cypress Hills are stargazing heaven in Canada.
From Cypress Hills I drove due north to finally, after years of thinking about it, visit the Great Sandhills near Leader, Saskatchewan. Above is a panorama from the “Boot Hill” ridge at the main viewing area.
The Sandhills is not a provincial park but is a protected eco zone, though used by local ranchers for grazing. However, much of the land remains uniquely prairie but with exposed sand dunes among the rolling hills.
There are farm lights in the distance but the sky above is dark and, in the panorama above, colored by twilight and bands of red and green airglow visible to the camera. It’s dark!
In the twilight, from the top of one of the accessible sand dunes, I shot a panorama of the array of four planets currently across the sky, from Venus in the southwest to Mars in the southeast.
This is the kind of celestial scene you can see only where the sky has nothing to get in the way.
If you are looking for a stellar experience under their “living skies,” I recommend Saskatchewan.
Three perfect nights in July provided opportunities to capture the night sky at popular sites in Banff National Park.
When the weather forecast in mid-July looked so promising I made an impromptu trip to Banff to shoot nightscapes and time-lapses under unusually clear skies. Clouds are often the norm in the mountains or, increasingly these days, forest fire smoke in late summer.
But from July 15 to 17 the skies could not have been clearer, except for the clouds that rolled in late on my last night, when I was happy to pack up and get some sleep.
My first priority was to shoot the marvellous close conjunction of the Moon and Venus on July 15. I did so from the Storm Mountain viewpoint on the Bow Valley Parkway, with a cooperative train also coming through the scene at the right time.
This was the view later with the Milky Way and Mars over Bow Valley and Storm Mountain.
The next night, July 16, was one of the most perfect I had ever seen in the Rockies. Crystal clear skies, calm winds, and great lake reflections made for a picture-perfect night at Bow Lake on the Icefields Parkway. Above is a 360ยฐ panorama shot toward the end of the night when the galactic centre of the Milky Way was over Bow Glacier.
Streaks of green airglow arc across the south, while to the north the sky is purple from a faint display of aurora.
This is a rare appearance of the unusual STEVE auroral arc on the night of July 16-17, 2018, with a relatively low Kp Index of only 2 to 3. While the auroral arc was visible the ISS made a bright pass heading east. This is a blend of a single 15-second exposure for the sky and ground, with seven 15-second exposures for the ISS, but masked to reveal just the ISS trail and its reflection in the water. The ISS shots were taken at 3-second intervals, thus the gaps. All with the Sigma 20mm Art lens at f/2 and Nikon D750 at ISO 6400. Taken from Bow Lake, Banff National Park, Alberta.
The unusual STEVE auroral arc across the northern sky at Bow Lake, Banff National Park, Alberta on the night of July 16-17, 2018. The more normal green auroral arc is lower across the northern horizon. But STEVE here appears more pink. The STEVE aurora was colourless to the eye but did show faint fast-moving rays, here blurred by the long exposure. They were moving east to west. The Big Dipper is at left. The lights are from Num-Ti-Jah Lodge. This is a single exposure for the sky and a mean-stacked blend of 3 exposures for the ground to smooth noise. All 15 seconds at f/2 with the Sigma 20mm Art lens and Nikon D750 at ISO 6400.
Earlier that night the usual auroral arc known as Steve put in an unexpected appearance. It was just a grey band to the eye, but the camera picked up Steve’s usual pink colours. Another photographer from the U.S. who showed up had no idea there was an aurora happening until I pointed it out.
My last night was at Herbert Lake, a small pond great for capturing reflections of the mountains around Lake Louise, and the Milky Way. Here, brilliant Mars, so photogenic this summer, also reflects in the still waters.
A blend of images to show the stars of the southern sky moving from east to west (left to right) over the peaks of the Continental Divide at Herbert Lake near Lake Louise, in Banff, Alberta. The main peak at left is Mount Temple. A single static image shows the Milky Way and stars at the end of the motion sequence. The star trails and Milky Way reflect in the calm waters of the small Lake Herbert this night on July 17, 2018. This is a stack of 100 images for the star trails, stacked with the Long Streak function of Advanced Stacker Plus actions, plus a single exposure taken a minute or so after the last star trail image. The star trail stack is dropped back a lot in brightness, plus they are blurred slightly, so as to not overwhelm the fixed sky image. The sky images are blended with a stack of 8 images for the ground, mean combined to smooth noise in the ground. All are 30 seconds at f/2.8 with the 24mm Sigma lens and Nikon D750 at ISO 3200. All were taken as part of a time-lapse sequence. Clouds moving in added the odd dark patches in the Milky Way that look like out of place dark nebulas. The reflected star trails are really there in the water and have not be copied, pasted and inverted from the sky image. They look irregular because of rippling in the water.
A blend of images to show the stars of the southern sky moving from east to west (left to right) over the Rocky Mountains at Bow Lake, in Banff, Alberta. The main peak at centre is Bow Peak. Crowfoot Glacier is at far left; Bow Glacier is at right below the Milky Way. A single static image shows the Milky Way and stars at the end of the motion sequence. The star trails and Milky Way reflect in the calm waters of Bow Lake this night on July 16, 2018, though they appear large and out of focus. This is a stack of 300 images for the star trails, stacked with the Ultrastreak function of Advanced Stacker Plus actions, plus a single exposure taken a minute or so after the last star trail image. The star trail stack is dropped back a lot in brightness, plus they are blurred slightly, so as to not overwhelm the fixed sky image. The sky images are blended with a stack of 8 images for the ground, mean combined to smooth noise in the ground. All are 30 seconds at f/2 with the 15mm Laowa lens and Sony a7III at ISO 3200. All were taken as part of a time-lapse sequence. Bands of airglow add the green streaks to the sky.
The stars trailing as they move east to west (left to right), ending with the Milky Way and Galactic Centre (right) over Storm Mountain and the Vermilion Pass area of the Continental Divide in Banff National Park, Alberta. Mars is the bright trail at left. Saturn is amid the Milky Way at right. This was July 15, 2018. The lights at left are from the Castle Mountain interchange at Highways 1 and 93. This is a stack of 8 exposures, mean combined to smooth noise, for the ground, plus 200 exposures for the star trails, and one exposure, untracked, for the fixed sky taken about a minute after the last star trail image. All 30 seconds at f/2.8 with the 24mm Sigma lens, and Nikon D750 at ISO 6400. The frames were taken as part of a time-lapse sequence. Dynamic Contrast filter from ON1 applied to the ground, and Soft and Airy filter from Luminar applied to the sky for a soft Orton effect.
At each site I shot time-lapses, and used those frames to have some fun with star trail stacking, showing the stars turning from east to west and reflected in the lake waters, and with a single still image taken at the end of the sequence layered in to show the untrailed sky and Milky Way.
But I also turned those frames into time-lapse movies, and incorporated them into a new music video, along with some favourite older clips reprocessed for this new video.
Banff by Night (4K) from Alan Dyer on Vimeo.
Enjoy! And do enlarge to full screen. The video is also in 4K resolution.
Clear skies!
โ Alan, August 2, 2018 / ยฉ 2018 Alan Dyer / AmazingSky.com
A clear break between storms provided a marvellous night in the mountains to shoot nightscapes.ย
Every year I travel to Waterton Lakes National Park in southwest Alberta to deliver public talks and photo workshops, usually as part of one of the festivals held each year. I was there June 15 to 17 to participate in the annual Wildflower Festival.
Two photographers and participants at my June 17, 2018 Night Photography Workshop in Waterton Lakes National Park, at Maskinonge, in the evening twilight, with the twilight colours over the lake. Two swans are in the distance. This was a magical evening.
A single exposure with the Sigma 20mm lens and Nikon D750.
A photographer and participant at my June 17, 2018 Night Photography Workshop in Waterton Lakes National Park, at Maskinonge, in the evening twilight, with the clouds lit by the setting Sun.
A single exposure with the Sigma 20mm lens and Nikon D750.
On Sunday, June 17 skies cleared to allow my workshop group to travel to one of my favourite spots, Maskinonge, to practice nightscape shooting techniques. The sunset was stunning, then as skies darkened the Moon and Venus over Waterton River provided the scene.
Two photographers and participants at my June 17 Night Photography Workshop in Waterton Lakes National Park, at Maskinonge, in the evening twilight, with the waxing crescent Moon (at centre) and noctilucent clouds (at right).
A single exposure with the Sigma 20mm lens and Nikon D750.
The waxing crescent Moon, and Venus (just above the mountain ridge) and, to the right, noctilucent clouds glowing low in the north over the Waterton River at the Maskinonge picnic area in Waterton Lakes National Park, Alberta on June 17, 2018. The Moon is beside Regulus in Leo.
There was no wind this night, rare for Waterton.
This is a high dynamic range stack of 5 exposures from dark to light, blended with Adobe Camera Raw. Taken with the Nikon D750 and Sigma 20mm lens. Additional contrast enhancement applied using Zone System Express 5 Photoshop extension and โEnhanced Contrastโ function.
As twilight deepened, a display of noctilucent clouds appeared to the north, my first sighting of the season for this unusual northern sky phenomenon. These clouds at the edge of space are lit by sunlight even at local midnight and form only around summer solstice over the Arctic.
Noctilucent clouds glowing low in the north over the Waterton River at the Maskinonge picnic area in Waterton Lakes National Park, Alberta on June 17, 2018. Cassiopeia (the โWโ) is at right.
This is a high dynamic range stack of 5 exposures from dark to light, blended with Adobe Camera Raw. Taken with the Nikon D750 and Sigma 20mm lens. Additional contrast enhancement applied using Zone System Express 5 Photoshop extension and โEnhanced Contrastโ function.
Noctilucent clouds glowing low in the north and reflected in unsually calm waters of the Waterton River at the Maskinonge picnic area in Waterton Lakes National Park, Alberta on June 17, 2018. There was no wind this night, rare for Waterton.
This is a high dynamic range stack of 5 exposures from dark to light, blended with Adobe Camera Raw. Taken with the Nikon D750 and Sigma 20mm lens. Additional contrast enhancement applied using Zone System Express 5 Photoshop extension and โEnhanced Contrastโ function.
As the sky slowly darkened and the Moon set, the Milky Way appeared arching across the east and down into the south. The sky was never “astronomically dark,” but even with perpetual twilight illuminating the sky, the Milky Way still made a superb subject, especially this night with it reflected in the calm waters on this unusually windless night for Waterton.
The Milky Way over Maskinonge Lake at Waterton Lakes National Park, Alberta, Canada, on June 17/18, 2018. This was an unusually calm night, allowing the reflections of the stars in the lake waters. Jupiter is in Libra at far right. Saturn is Sagittarius in the Milky Way at left of centre. Scorpius is in between. The sky is deep blue from solstice twilight.
The Maskinonge area is a sacred site to the Blackfoot Nation.
This is a two-section panorama, with the ground a stack of 5 exposures for each section to smooth noise, with the sky and stellar reflections coming from one exposure for each segment to minimize trailing. All 25 seconds at f/2.2 with the 20mm Sigma Art lens and Nikon D750 at ISO 3200. Stiching with Photoshop Photomerge.
Jupiter (at right) and Saturn (at left) shining brightly in the sky and reflected in the still waters of Maskinonge Lake at Waterton Lakes National Park, Alberta, on June 17/18, 2018. The Milky Way is at left, Scorpius is at centre, and two satellite trails are at top. The sky is blue with solstice twilight. The trees on the opposite shore are charred from the Kenow Fire in September 2017. In the distance are Sofa Mountain and Viny Peak.
This is a stack of 10 exposures for the ground, mean combined to smooth noise, and one exposure for the sky and stellar reflections. All 20 seconds at f/2.2 with the Sigma 20mm Art lens and Nikon D750 at ISO 3200.
On the way back to town, I stopped at another favourite spot, Driftwood Beach on Middle Waterton Lake, to take more images of the Milky Way over Waterton, including the lead image at top.
It was a perfect night in Waterton for shooting the stars and enjoying the night sky. By morning it was raining again!
โ Alan, June 21, 2018 / ยฉ 2018 Alan Dyer / AmazingSky.com
Revised and expanded, the new Third Edition of my Nightscapes and Time-Lapses eBook provides one of the most comprehensive guides to the subject you’ll find!
The 2018 Third Edition of my ebook How to Photograph and Process Nightscapes and Time-Lapses is now available at the Apple iBooks Store.
Here’s a short promo video, one that also opens the ebook as one of the embedded videos.
I originally published this ebook in 2014, then revised it in late 2016. Hereโs whatโs new in this 2018 Third Edition:
Updated equipment (cameras, lenses, filters, time-lapse gear) to reflect whatโs current as of mid-2018. For example I added: the Revolve Camera slider; functions from the Canon 6D MkII; and information about the Sony a7III Mirrorless.ย
Updated the processing tutorials with current software: Photoshop CC2018, Lightroom Classic CC, Starry Landscape Stacker, TLDF, Timelapse Workflow, and LRTimelapse version 5.
Added tutorials on selected non-Adobe programs: DxO PhotoLab, ON1 Photo RAW, Affinity Photo, and the extensions Raya Pro 3 and Dr. Brownโs Services.
Added some 50 new topic pages, such as on memory cards and exposure blending.
In addition Iโve performed โhousekeeping choresโ such as:
Removing some embedded movies to reduce the file size and
Converting interactive diagrams into labeled images and
Flattening some of the interactive image galleries, all for facilitating conversion to PDFs for non-Apple platforms.ย
Improving the resolution of most tutorial screenshot images.
Improving many diagrams and updating many images.
Merging the chapter on Intervalometers into Chapter 1.
Plus Iโve added a section on lunar eclipses back in. Yay!
Here are screen shots of sample chapter content pages, to provide an idea of what the ebook contains and looks like.
All current owners of the older editions get the Third Edition update for free through the iBooks app (Mac or iPad, and also iPhone).
I hope you enjoy the new edition. Tell your friends! And do leave a rating or review at the iBooks sales page. Thanks!
And yes, for non-Apple people, aย non-interactive PDF version for all other platforms (Windows and Android) is in production for later this year.
Thanks!
โ Alan, June 9, 2018 / ยฉ 2018 Alan Dyer / amazingsky.com
I put the new Sony a7III mirrorless camera through its paces for the features and functions we need to shoot the night sky.
Sonyโs a7III camera has enjoyed rave reviews since its introduction earlier in 2018. Most tests focus on its superb auto exposure and auto focus capabilities that rival much more costly cameras, including Sonyโs own a7rIII and a9.ย
For astrophotography, none of those auto functions are of any value. We shoot everything on manual. Indeed, the ease of manually focusing in Live View is a key function.ย
In my testing I compared the Sony a7III to two competitive DSLRs, the Canon 6D MkII and Nikon D750.
All three are โentry-levelโ full-frame cameras, with 24 to 26 megapixels and in a similar price league of $1,500 (Nikon) to 2,000 (Sony).ย
I tested a Sony a7III purchased locally. It was not supplied to me by Sony in return for an โinfluentialโ blog post.
I did this testing in preparation for the new third edition of my Nightscapes and Time-Lapse eBook, which includes information on Sony mirrorless cameras, as well as many, many other updates and additions!
NOTE:Click or Tap on most images to bring them up full-frame for inspection.
MILKY WAY AT DINOSAUR PARK Aย stack of 2 x 90-second exposures for the ground, to smooth noise, and at f/2.8 for better depth of field, plus a single 30-second untracked exposure at f/2 for the sky. All with the Laowa 15mm lens and Sony a7III at ISO 3200.
Mirrorless vs. DSLR
COMPACT CAMERA and LENS The Sony a7III with the compact but fast Laowa Venus Optics 15mm f/2 lens.
As with Sonyโs other popular Alpha 7 and 9 series cameras, the new Alpha 7III is a full-frame mirrorless camera, a class of camera Canon and Nikon have yet to offer, though models are rumoured or promised.ย
In the meantime, Sony commands the full-frame mirrorless market.
As its name implies, a mirrorless camera lacks the reflex mirror of a digital single lens reflex camera that, in a DSLR, provides the light path for framing the scene though the optical viewfinder.ย
SONY LIVE VIEW The Sony a7IIIโs excellent Live View screen display. You can see the Milky Way!
In a mirrorless, the camera remains in โlive viewโ all the time, with the sensor always feeding a live image to either or both the rear LCD screen and electronic viewfinder (EVF). While you can look through and frame using the EVF as you would with a DSLR, you are looking at an electronic image from the sensor, not an optical image from the lens.ย
The advantage of purely electronic viewing is that the image you are previewing matches the image youโll capture, at least for short exposures. The disadvantage is that full-time live view draws more power, with mirrorless cameras notorious for being battery hungry.ย
Other mirrorless advantages include:
Compact size and lighter weight, yet offering all the image quality of a full-frame DSLR.
The thinner body allows the use of lenses from any manufacturer, albeit requiring the right adapter, an additional expense.
Lenses developed natively for mirrorless models can be smaller and lighter. An example is the Laowa 15mm f/2 I used for some of the testing.
The design lends itself to video shooting, with many mirrorless cameras offering 4K as standard, while often in DSLRs only high-end models do.
More rapid-fire burst modes and quieter shutters are a plus for action and wedding photographers, though they are of limited value for astrophotography.
Points of Comparison
CAMERA TRIO The Sony a7III, Nikon D750, and Canon 6D Mark II. Note the size difference.
In testing the Sony a7III I ignored all the auto functions. Instead, I concentrated on those points I felt of most concern to astrophotographers, such as:
Noise levels
Effectiveness of Long Exposure Noise Reduction (LENR)ย
Quality of Raw files, such as sharpness of stars
Brightness of Live View for framing and focusing
Uniformity of sensor illumination
Compatibility for time-lapse imaging
Battery life
TL;DR Conclusions
DEEP-SKY TEST The North America Nebula with the Sony a7III and a Meade 70mm f/5 astrographic refractor, for a single 4-minute exposure at ISO 1600. The reds have been boosted in processing.
Noise
Levels of luminance and chrominance noise were excellent and similar to โ but surprisingly not better than โ the Nikon D750.
Star Eater
The Star Eater is effectively gone. Stars are not smoothed out in long exposures.ย
ISO Invarianceย
The Sony exhibited good โ though not great โ โISO invariantโ performance.
Dark Framesย
Dark frame subtraction using Long Exposure Noise Reduction removed most โ but not all โ hot pixels from thermal noise.ย
Live View Focusing and Framing
Live View was absolutely superb, though the outstanding Bright Monitoring function is as well-hidden as Sony could possibly make it.ย
Sensor Illumination Uniformity
The Sony showed some slight edge-of-frame shadowing from the mask in front of the sensor, as well as a weak purple amp glow.
Featuresย
โขย The a7III lacks any internal intervalometer or ability to add one via an app. But it is compatible with many external intervalometers and controllers.
โขย The a7IIIโs red sensitivity for recording H-Alpha-emitting nebulas was poor.ย
โข It lacks the โlight-frameโ buffer offered by full-frame Canons that allows shooting several frames in quick succession even with LENR turned on.
Video Capabilityย
The a7III offers 4K video and, at 24 frames-per-second, is full-frame. Shutter speeds can be as slow as 1/4-second, allowing real-time aurora shooting at reasonable ISO speeds.ย
Battery Life
Shooting typical 400-frame time-lapses used about 40% of the battery capacity, similar to the other DSLRs.ย
Overall Recommendations
The Sony a7III is a superb camera for still and time-lapse nightscape shooting, and excellent for real-time aurora videos. It is good, though not great, for long-exposure deep-sky imaging.ย
STAR TRAILS and AURORAย With the Laowa 15mm lens and Sony a7III, for 155 exposures, all 20 seconds at f/2.8 and at ISO 800, and taken as part of a 360-frame time-lapse.
Noise
The Sony a7III uses a sensor that is โBackside Illuminated,โ a feature that promises to improve low-light performance and reduce noise.ย
I saw no great benefit from the BSI sensor. Noise at typical astrophoto ISO speeds โ 800 to 6400 โ were about equal to the four-year-old Nikon D750.ย
That was a bit surprising. I expected the new BSI-equipped Sony to better the Nikon by about a stop. It did not. This emphasizes just how good the Nikon D750 is.ย
Nevertheless, noise performance of the Sony a7III was still excellent, with both the Sony and Nikon handily outperforming the Canon 6D MkII, with its slightly smaller pixels, by about a stop in noise levels.ย
NOTE: I performed all Raw developing with Adobe Camera Raw v10.3. It is possible some of the artifacts I saw are due to ACR not handling the a7IIIโs .ARW files as well as it should. But to develop all the images from Sony, Nikon, and Canon equally for comparisons, ACR is the best choice.ย
COMPARING NOISE The Sony a7III exhibited noise levels similar to the Nikon D750 at high ISOs, with the Sony and Nikon each about a stop better for noise than the Canon 6D MkII.
NOISE AT ISO 3200 At ISO 3200, a common nightscape ISO speed, all three cameras performed well in this moonlit scene. The Canon shows a darker sky as its images were taken a few minutes later. The Nikon had the Sigma 14mm Art lens; the Canon and Sony used the same Rokinon 14mm SP lens.
NOISE AT ISO 6400 At ISO 6400, the Canon begins to show excessive noise, about a stop worse than the Nikon and Sony. No luminance noise reduction was applied to these images. All cameras show an equal number of stars recorded.
ISO Invariance
Both the Sony and Nikon use sensor and signal path designs that are โISO invariant.โ As a result, images shot underexposed at slower ISOs, then boosted in exposure later in processing look identical to properly exposed high-ISO images. Well, almost.
The Sony still showed some discoloration artifacts and added noise when boosting images by +4 EV that the Nikon did not. Even with uncompressed Raws, the Sony was not quite as ISO invariant as the Nikon, though the difference shows up only under extreme push-processing of badly underexposed frames.ย
Plus, the Sony was far better than the Canon 6D MkIIโs โISO variantโ sensor. Canon really needs to improve their sensors to keep in the game.ย
ISO INVARIANCE COMPARISON Here I shot all three cameras at ISO 6400 for a correct exposure for the scene, and also at ISO 1600 and ISO 400, for images 2 and 4 stops underexposed respectively. These were then boosted in Adobe Camera Raw by 2 and 4 stops in Exposure Value (EV) to compensate. With ISO invariant sensors the boosted images should look similar to the well-exposed image.
ISO INVARIANCE CLOSE-UP A closeup of the scene shows the ISO variant Canon exhibited more noise and magenta discoloration in the +4 EV boosted image. The Nikon looks very clean, but the Sony also shows discoloration, green here, and an increase in noise. These are all uncompressed 14-bit Raw files.
SONY vs. NIKON Comparing just the two ISO-invariant cameras, the Sony and the Nikon, on another night, shows a similar performance difference when boosting underexposed slow-ISO images later in Camera Raw. The Sony begins to show more noise and now a magenta discoloration in the +3 and +4 EV images, similar to, but not as badly as does the ISO-variant Canon 6D MkII.
Compressed vs. Uncompressedย
The Sony a7III offers a choice of shooting Uncompressed or Compressed Raw files. Uncompressed Raws are 47 Mb in size; Compressed Raws are 24 Mb.ย
In well-exposed images, I saw little difference in image quality.ย
But the dark shadows in underexposed nightscapes withstood shadow recovery better in the uncompressed files. Compressed files showed more noise and magenta discoloration in the shadows.ย
It is not clear if Sonyโs compressed Raws are 12-bit vs. 14-bit for uncompressed files.ย
Nevertheless, for the demands of nightscape and deep-sky shooting and processing, I suggest shooting Uncompressed Raws. Use Compressed only if you plan to take lots of time-lapse frames and need to conserve memory card space on extended shoots.ย
UNCOMPRESSED vs. COMPRESSED Here I compare any image degradation from using compressed vs. uncompressed Raws, and from employing Long Exposure Noise Reduction. Images are only slightly underexposed and boosted by +1 EV in Camera Raw. Shadow noise is similar in all images, with the ones taken with LENR on showing elimination of colored hot pixels, as they should.
UNCOMPRESSED vs. COMPRESSED at -4EV The same scene but now underexposed by 4 stops and boosted by +4 EV later shows greater differences. The compressed image shows more noise and discoloration, and the images taken with LENR on, while eliminating hot pixels, show more random luminance noise. Keep in mind, these are vastly underexposed images.ย
UNCOMPRESSED vs. COMPRESSED DEEP-SKY A real-world deep-sky example shows the same comparison. All images are well-exposed, for tracked and guided 4-minute exposures. The ones taken with LENR on show fewer hot pixels. The compressed images appear identical to the uncompressed files for noise and star content.
Star Eater (Updated March 27, 2021)
Over the last year or so, firmware updates from Sony introduced a much-publicized penchant for Sony Alphas to โeatโ stars even in Raw files, apparently due to an internal noise reduction or anti-aliasing routine users could not turn off. Stars were smoothed away along with the noise in exposures longer than 3.2 seconds in some Sony cameras (longer than 30 seconds in others).
I feel that in the a7III the Star Eater has been largely vanquished.
While others beg to differ and claim this camera still eats stars, they offer no evidence of it other than graphs and charts, not A-B photos of actual tracked starfields taken with the Sony vs. another camera thought not to eat stars.
As the images below show, there is a very slight one-pixel-level softening that kicks in at 4 seconds and longer but it did not eat or wipe out stars. Stars are visible to the same limiting magnitude and close double stars are just as well resolved across all exposures. Indeed, at slower ISOs and longer exposures, more stars are visible.
I saw none of the extreme effects reported by others with other Sonys, where masses of faint stars disappeared or turned into multi-colored blotches. It is possible the effect is still present in other Sony Alpha models. I have not tested those.
But in the a7III, I did not see any significant “star eating” in any long exposures even up to the 4 minutes I used for some deep-sky shots. In images taken at the same time with other cameras not accused of star eating, the Sony showed just as many faint stars as the competitors. Stars were visible to just as faint a limiting magnitude, and that’s what counts, NOT graphs and charts, especially when such results are not shown for other cameras.
In short, long exposures showed just as many stars as did short exposures.
This was true whether I was shooting compressed or uncompressed Raws, with or without Long Exposure Noise Reduction. Neither compression nor LENR invoked โstar eating.โย
STAR EATER SERIES at 200% This series of tracked images (shown here blown up 200%) goes from 2 seconds to 2 minutes, with decreasing ISO speed to equalize the exposure value across the series. Between 3.2s and 4s a very slight one-pixel-level softening does kick in, reducing noise and very slightly blurring stars. Yet, just as many stars are recorded and are resolved, and at the lower ISOs/longer exposures more stars are visible because faint stars are not lost in the noise.
STAR EATER SERIES at 400% This is the same series as above but now blown up 400% to better reveal the very subtle change in pixel-level sharpness as exposure lengthened from 3.2 to 4 seconds. Noise (most noticeable in the trees) is reduced and stars are very slightly softened. But none are “eaten” or wiped out. And star colors are not affected, though very small stars are sometimes green, an effect seen in other cameras due to de-Bayering artifacts.
STAR EATER DEEP-SKY #1 Tracked deep-sky images through a telescope using 4-minute exposures show the Sony a7III recording an equal number of faint stars as the Canon 6D MkII. No luminance noise reduction was applied to these images in processing.
STAR EATER DEEP-SKY #2 Another example with 4-minute exposures again demonstrates no problems recording faint stars. The Canon does show more noise than the Sony. No noise reduction was applied in processing.ย
SONY and NIKON COMPARED For yet more evidence, this is a comparison of the Sony a7III vs. the Nikon D750 in tracked 90-second exposures with 14mm lenses. Again, the Sony records just as many stars as the Nikon.
LENR Dark framesย
For elimination of hot pixels from thermal noise I prefer to use Long Exposure Noise Reduction when possible for nightscape and deep-sky images, especially on warm summer nights.
Exceptions are images taken for star trail stacking and for time-lapses, images that must be taken in quick succession, with minimal time gap between frames.
Turning on LENR did eliminate most hot pixels in long exposures, but not all. A few remained. Also, when boosting the exposure a lot in processing, the images taken with LENR on showed more shot and read noise than non-LENR frames.ย
The dark frame the camera was taking and subtracting was actually adding some noise, perhaps due to a temperature difference. The cause is not clear.ย
Sony advises that when using LENR Raw images are recorded with only 12-bit depth, not 14-bit. This might be a contributing factor. Yet frames taken with LENR on were the same 47 Mb size as normal uncompressed frames.
For those who think this is normal for LENR use, the Nikon D750 shows nothing like this โ frames taken with LENR on are free of all hot pixels and do not show more shot or read noise, nor deterioration of shadow detail from lower bit depths.
However, I emphasize that the noise increase from using LENR with the Sony was visible only when severely boosting underexposed images in processing.ย
In most shooting situations, I found using LENR provided the overriding positive benefit of reducing hot pixels. It just needs to be better, Sony!
SONY WITH AND WITHOUT LENR These are 4-minute exposures of dark frames (i.e. the lens cap on!) taken at room temperature with and without Long Exposure Noise Reduction. In the Sony, LENR did not eliminate all hot pixels nor the magenta amp glow at the left edge. LENR also added a background level of fine noise. These have had exposure and contrast increased to exaggerate the differences.
NIKON WITH AND WITHOUT LENR Dark frames taken with the Nikon D750 under the same circumstances and processed the same show none of the residual hot pixels and added background noise when LENR is employed. Nor is there any amp glow anywhere along the frame edges.
SONY REAL-WORLD LENR COMPARISON A real-world example with the Sony, with a properly exposed nightscape, shows that the ill effects of using LENR donโt show up under normal processing. You do get the benefit of reduced hot pixels in shadows, especially on a warm night like this was. This is a blow-up of the lower corner of the frame, as indicated.
Sensor Illuminationย
How evenly an image is illuminated is a common factor when testing lenses.ย
But astrophotography, which often requires extreme contrast boosts, reveals non-uniform illumination of the sensor itself, regardless of the optics, originating from hardware elements in front of the sensor casting shadows onto the sensor.ย
This is most noticeable โ indeed usually only noticeable โย when shooting deep-sky targets though telescopes.ย
With DSLRs it is the raised mirror which often casts a shadow, produced a dark vignetted band along the bottom of the frame. Its extent varies from camera model to model.
With a mirrorless camera the sensor is not set far back in a mirror box, as it is in a DSLR. As such, I would have expected a more uniformly illuminated sensor.ย
SENSOR CLOSE-UPย showing intruding mask edges.
Instead, I saw a slight shadowing at the top and bottom edges but just at the corners. This is from a thin metal mask in front of the sensor. It intrudes into the light path ever so slightly. It shouldnโt.ย
This is an annoying flaw, though applying โflat fieldsโ or ad hoc local adjustments should eliminate this. But that’s a nuisance to do, and should not be necessary with a mirrorless camera.
Worse is that long deep-sky exposures at high ISOs also exhibited a faint purple glow at the left edge, perhaps from heat from nearby electronics, a so-called โamp glow.โ Or I’ve read where this is from an internal infrared source near the sensor.
Taking a dark frame with LENR did not eliminate this, and it should, demonstrating again that for whatever reason in the a7III LENR is not as effective as it should be.ย
I have not seen such “amp” glows in cameras (at least in the DSLRs Iโve used) for a number of years, so seeing it in the new Sony a7III was another surprise.ย
This would be much tougher to eliminate in deep-sky images where the extreme contrast boosts we typically apply to images of nebulas and galaxies will accentuate any odd glows.ย
UPDATE: March 27, 2021 โ Subsequent firmware updates seem to have eliminated this amp glow. One supplier of filter-modified cameras, Spencer’s Camera, who had refused to modify Sonys because of this glow, now lists many Sony Alphas as suitable for modification. However, the sensor masks and “green stars” (described below) still make the Sony a7III less desirable for deep-sky imaging than other mirrorless cameras I’ve tested.
SONY FIELD ILLUMINATION #1 The full field of a deep-sky image taken through an f/5 70mm astrographic refractor shows the minor level of edge darkening at the corners from shadowing of the sensor in the Sony.
SONY FIELD ILLUMINATION #2 The full field of a deep-sky image taken through an f/6 105mm refractor shows the level of edge darkening at the edges from shadowing of the sensor in the Sony, and the purple “amplifier” glow at the left edge present in all very long exposures.
Red Sensitivity
When shooting deep-sky objects, particularly red nebulas, we like a camera to have a less aggressive infrared cutoff filter, to pick up as much of the deep red Hydrogen-Alpha emission line as possible.ย
The Sony showed poor deep-red sensitivity, though not unlike other cameras. It was a little worse than the stock Canon 6D MkII.ย
This isnโt a huge detriment, as anyone who really wants to go after deep nebulosity must use a โfilter-modifiedโ camera anyway.ย
Canon and Nikon both offered factory modified cameras at one time, notably the Canon 60Da and Nikon D810a. Sony doesnโt have an โaโ model mirrorless.
To get the most out of the Sony for deep-sky imaging you would have to have it modified by a third-party, though the amp glow described above makes it a poor choice for modification.
RED SENSITIVITY COMPARED Three deep-sky exposures compare cameras for red sensitivity: a filter-modified Canon 5D MkII, a stock Canon 6D MkII, and the stock Sony a7III. As expected the filter-modified camera picks up much more red nebulosity. The Sony doesnโt do quite as well as the Canon 6D MkII.
Live View Focusing and Framingย
Up to now my report on the Sony a7III hasnโt shown as glowing a performance as all the YouTube reviews would have you believe.ย
But Live Focus is where the a7III really stands out. I love it!
In Live View it is possible to make the image so bright you can actually see the Milky Way live on screen! Wow! This makes it so easy to frame nightscapes and deep-sky fields. ย
FINDING BRIGHT MONITORING The excellent Bright Monitoring function is accessible only off the Custom Key menu where it appears as a choice on the Display/Auto Review2 page (below) that can be assigned to a C button.
But this special โBright Monitoringโ mode is as well hidden as Sony could make it. Unless you actually read the full-length 642-page PDF manual (you have to download it), you wonโt know about it. Bright Monitoring does not appear in any of the in-camera menus you can scroll through, so you wonโt stumble across it.
Instead, you have to go to the Camera Settings 2 page, then select Still ImageโCustom Key. In the menu options that appear you can now scroll to one called Bright Monitoring. Surprise! Assign it to one of the hardware Custom C buttons. I put it on C2, making it easy to call up when needed.ย
The other Live View function that works well, but also needs assigning to a C button is the Camera Settings 1 > Focus Magnifier. I put this on C1. It magnifies the Live View by 5.9x or 11.7x, allowing for precise manual focusing on a star.ย
Two other functions are useful for Live View:ย
Camera Settings 2 > Live View Display > Setting Effect ON. This allows the Live View image to reflect the camera settings in use, better simulating the actual exposure, even without Bright Monitoring on.
Camera Settings 1 > Peaking Setting. Turning this ON superimposes a shimmering effect on parts of an image judged in focus. This might be an aid, or an annoyance. Try it.ย
In all, the Sony provides superb, if well-hidden, Live View options that make accurately framing and focusing a nightscape or time-lapse scene a joy.ย
Great Features for Astrophotographyย
Here are some other Sony a7III features I found of value for astrophotography, and for operating the camera at night.ย
SONY TILTING SCREEN It tilts up and down but does not flip out as with the Canon 6D MkII’s. Still, this is a neck- and back-saving feature for astrophotography.
Tilting LCD Screenย
Like the Nikon D750, the Sonyโs screen tilts vertically up and down, great for use when on a telescope, or on any tripod when aimed up at the sky. As photographers age, this becomes a more essential feature!
Custom Buttonsย
The four C buttons can be programmed for oft-used functions, making them easy to access at night. Standard functions such as ISO and Drive Mode are easy to get at on the thumb wheel, unlike the Nikon D750 where I am forever hunting for the ISO or Focus Zoom buttons, or the Canon 6D MkII which successfully hides the Focus Zoom and Playback buttons at night.
My Menuย
In new models, Sony now offers the option of a final โMy Menuโ page which you can populate with often-used functions from the other 35 pages of menu commands!
Adaptability to Many Lensesย
Using the right lens adapter (I use one from Metabones), it is possible to use lenses with mounts made for Canon, Nikon, Sigma and others. Plus there are an increasing number of lenses from third parties offered with native Sony E-mounts. This is good news, as astrophotography requires fast, high-quality lenses, and the Sony allows more choices.
Lighter Weight / Smaller Size
The compact a7III body weighs a measured 750 grams, vs. 900 grams each for the Nikon D750 and Canon 6D MkII. The lower weight can be helpful for use on lightweight telescopes, on small motion control devices, and for simply keeping weight and bulk down when traveling.ย
Dual Card Slotsย
Not essential, but having two card slots is very helpful, for backup, for handling overflows from very long time-lapse shoots, or assigning them for stills vs. movies, or Raws vs. JPGs.ย Only Slot 1 will work with the fastest UHS II cards that are needed for recording the highestย quality 4K video.
USB Powerย
It is possible to power the camera though the USB port (indeed thatโs how you charge the battery, as no separate battery charger is supplied as standard, a deficiency). This might be useful for long shoots, though likely as not that same USB port will be needed for an intervalometer or motion control device. But if the Sony had a built-in intervalometerโฆ!
Display Options
To reduce battery drain it is possible to turn off the EVF completely โ I find I never use it at night โ and to turn off the LCD display when shooting, though the latter is an option you have to activate to add to the Display buttonโs various modes.ย
The downside is that when shooting is underway you get no reassuring indication anything is happening, except for a brief LED flash when an image is written to a card. ย
Electronic Front Curtain Shutter
Most DSLRs do not offer this, but the Sonyโs option of an electronic front curtain shutter and the additional Silent Shooting mode completely eliminates vibration, useful for some high-magnification shooting through telephotos and telescopes.
LUNAR CLOSE-UPS COMPARED This trio compares closeups of the Moon taken with and without electronic front curtain shutter. All were taken through a 130mm refractor telescope at f/12 using a Barlow lens. The image with e-shutter and in Silent Mode is a tad sharper, but that could be just as much from variations in seeing conditions as from the lower vibration from using the electronic shutter.
Whatโs Missing for Astrophotography
Intervalometerย โ NOW INCLUDED! UPDATE: In April 2019 Sony issued a v3 Firmware update for the a7III which added an internal intervalometer. I’ve used this new function and it works very well.
I had originally remarked that this useful function was missing. But no more! Thank you Sony!
While a built-in intervalometer is not essential, I find I often do use the Canon and Nikon in-camera intervalometers for simple shoots. So it is great to have one available on the Sony. However, like other brands’ internal intervalometers Sony’s is good only for exposures up to 30 seconds long.
Bulb Timer or Long Exposures
However, while the Sony has a Bulb setting there is no Bulb Timer as there is with the Canon. The Bulb Timer would allow setting long Bulb exposures of any length in the camera.ย
Instead, for any exposures over 30 seconds long (or time-lapses with >30-second-long frames) the Sony must be used with an external Intervalometer. I use a $50 Vello unit, and it works very well. It controls the Sony through the cameraโs Multi USB port.
In-Camera Image Stackingย
Also missing, and present on most new Canons, are Multiple Exposure modes for in-camera stacking of exposures in a Brighten mode (for star trails) or Averaging mode (for noise smoothing).ย
Yes, this can all be done later in processing, but having the camera do the stacking can often be convenient, and great for beginners, as long as they understand what those functions do, or even that they exist!
Time-Lapse Smoothingย
When using its internal intervalometer, the Nikon D750 has an excellent Exposure Smoothing option. This does a fine job smoothing frame-to-frame flickering in time-lapses, something the Canon cannot do. Nor the Sony, as it has no intervalometer at all.
Light Frame Buffer in LENR
This feature is little known and utilized, and only Canon full-frame cameras offer it. Turn on LENR and it is possible to shoot three (with the 6D MkII) or four (with the 6D) Raw images in quick succession even with LENR turned on. The Canon 5D series also has this.ย
The dark frame kicks in and locks up the camera only after the series of โlight framesโ are taken. This is wonderful for taking a set of noise-reduced deep-sky images for later stacking. Nikons donโt have this, not even the D810a, and not Sonys.ย
Illuminated Buttonsย
The Sonyโs buttons are not illuminated. While these might add glows to long exposure images, if they could be designed not to do that (i.e. they turn off during exposures), lit buttons would be very handy at night.ย
Limited Touch Screen Functionsย
An alternative would be an LCD screen that was touch sensitive. The Sony a7IIIโs screen is, but only to select an area for auto focus or zooming up an image in playback. The Canon 6D MkII has a fully functional touch screen which can be, quite literally, handy at night. ย
INTERVALOMETER For time-lapses, the Sony must be used with an external intervalometer like this Vello unit.
Video Capabilityย
Hereโs another area where the new Sony a7III really shines.ย
It offers 4K (or more precisely UltraHD) video recording for videos of 3840 x 2160 pixels. (True 4K is actually 4096 x 2160 pixels.)
With a fast enough UHS-II Class card it can record 4K video up to 30 frames per second and at a bit rate of either 60 or 100 Mbps.ย
At 24 fps videos are full-frame with no cropping. Hurray! You can take full advantage of wide-angle lenses, great for auroras. At 30 fps, 4K videos are cropped with a 1.2x crop factor.
In Movie Mode ISO speeds go up to ISO 102,400, but are pretty noisy, if unusable at such speeds.ย
But when shooting aurora videos I found, to my surprise, I could “drag” the shutter speeds as slow as 1/4-second, fully 4 stops better than the Nikonโs slowest shutter speed of 1/60 second in Full HD, and 3 stops better than the Canonโs slowest movie shutter of 1/30 second.ย
Coupled with a fast f/1.4 to f/2 lens, the slow shutter speed allows real-time aurora shooting at โonlyโ ISO 6400 to 12,800, for quite acceptable levels of noise. I am very impressed!ย
Real-time video of auroras is not possible with anything like this quality with the Nikon (Iโve used it often), and absolutely not with the Canon. And neither are 4K.ย
Is the a7III as good for low-light video as the Sony a7s models, with their larger 8.5-micron pixels?ย
I would assume not, but not having an a7s (either Mark I or II) to test I canโt say for sure. But the a7III should do the job for bright auroras, the ones with rapid motion worth recording with video, plus offer 24 megapixels for high-quality stills of all sky subjects.ย
I think itโs a great camera for both astrophoto stills and video.
AURORA VIDEO FRAME This is a frame grab from a real-time 4K video of a โSteveโ aurora.
An example is in a 4K video I shot on May 6, 2018 of an usual aurora known as โSTEVE.โ
Steve Aurora – May 6, 2018 (4K) from Alan Dyer on Vimeo.
For another example of using the Sony a7III for recording real-time video of the night sky see this video of the aurora shot from Norway in March 2019.
The Northern Lights At Sea from Alan Dyer on Vimeo.
Battery Life
I found the a7III would use up about about 40% of the battery capacity in a typical 400-frame time-lapse on mild spring nights, with 30-second exposures. This is with the EVF and rear LCD Display OFF, and the camera in Airplane mode to turn off wireless functions to further conserve battery power. I was using the wired Vello intervalometer.ย
This is excellent performance on par with the DSLRs I use. At last, we have a mirrorless camera that not only doesnโt eat stars, it also does not eat batteries!ย
One battery can get you through a night of shooting, though performance will inevitably decline in winter, as with all cameras.ย
MILKY WAY and PLANETS With the Sony a7III and Laowa 15mm lens at f/2 for a stack of 4 exposures for the ground to smooth noise and one exposure for the sky, all 30 seconds at ISO 3200.
Lens and Telescope Compatibilityย
As versatile as a mirrorless camera is for lens choice, making use of that versatility requires buying the right lens adapter(s). They can cost anywhere from $100 to $400. The lowest cost units just adapt the lens mechanically; the more costly units also transfer lens data and allow auto focusing with varying degrees of compatibility.ย
WITH METABONES CANON ADAPTER The MetaBones Canon EF-to-Sony E mount adapter transfers lens data and allows auto focus to function.
For use on telescopes, the simple adapters will be sufficient, and necessary as many telescope-to-camera adapters and field flatteners are optimized for the longer lens flange-to-sensor distance of a DSLR. Even if you could get a mirrorless camera to focus without a lens adapter to add the extra spacing, the image quality across the field might be compromised on many telescopes.ย
I used the Metabones Canon-to-Sony adapter when attaching the Sony to my telescopes using my existing Canon telescope adapters. Image quality was just fine.ย
ADAPTING TO A TELESCOPE The MetaBones adapter, as will other brands, adds the correct lens flange to sensor distance for telescope field flatteners to work best.
Time-Lapse Controller Compatibilityย
Due to limitations set by Sony, controlling one of their cameras with an external controller can be problematic.ย
Devices that trigger only the shutter should be fine. That includes simple intervalometers like the Vello, the Syrp Genie Mini panning unit, and the Dynamic Perception and Rhino sliders, to name devices I use. However, all will need the right camera control cable, available from suppliers like B&H.ย
And, as I found, the Sony might need to be placed into Continuous shooting mode to have the shutter fire with every trigger pulse from the motion controller. When used with the Genie Mini (below) the Sony fired at only every other pulse if it was in Single shot mode, an oddity of Sony’s firmware.
Some time-lapse controllers are able to connect to a camera through its USB port and then adjust the ISO and aperture as well, for ramped โholy grailโ sunset-to-Milky Way sequences.ย
For example, the TimeLapse+ View (see http://www.timelapseplus.com) works great for automated holy grails, but the developer recommends that with most Sonys the minimum allowed interval between shots is longer (8 to 14 seconds) than with Canons and Nikons. See http://docs.view.tl/#camera-specific-notesย
SONY WITH THE SYRP GENIE MINI The Sony A7III worked well with the Syrp Genie Mini motion controller with the right shutter cable but only when placed in Continuous mode.
Recommendationsย
In conclusion, hereโs my summary recommendations for the three competitive cameras, rating them from Poor, to Fair, to Good, to Excellent.ย
SONY: I deducted marks from the Sony a7III for deep-sky imaging for its lack of a light frame buffer, poor red sensitivity, odd LENR performance, and purple amp glow not seen on the other cameras and that dark frames did not eliminate.ย
However, I did not consider “star eating” to be a negative factor, as theย Sony showed just as many stars and as well-resolved as did the competitors, and what more could you ask for?
I rate the Sony excellent for nightscape imaging and for real-time aurora videos. I list it as just โgoodโ for time-lapse work only because it will not be fully compatible with some motion controllers and rampers. So beware!
NIKON: I deducted points for real-time video of auroras โ the D750 can do them but is pretty noisy with the high ISOs needed. Its red sensitivity is not bad, but its lack of a light frame buffer results a less productive imaging cycle when using LENR on deep-sky shooting.ย
I know โฆ people shoot dark frames separately for subtracting later in processing. However, Iโve found these post-shoot darks rarely work well, as the dark frames are not at the same temperature as the light frames, and often add noise or dark holes.ย
CANON: The 6D MkIIโs lack of an ISO invariant sensor rears its ugly head in underexposed shadows in dark-sky nightscapes. I like its image stacking options, which can help alleviate the noise and artifacts in still images, but arenโt practical for time-lapses. Thus my Good rating for nightscapes but Fair rating for time-lapses. (See my test at https://amazingsky.net/2017/08/09/testing-the-canon-6d-mark-ii-for-nightscapes/)
While the 6D MkII has HD video, it is incapable of any low-light video work.
And its light-frame buffer is great for minimizing shooting time for a series of deep-sky images with in-camera LENR dark frames, which I find are the best for minimizing thermal noise. Give me a Canon full-frame any day for prime-focus deep-sky shooting.ย
Itโs just a pity the 6D MkII has only a 3-frame buffer when using LENR. Really Canon? The 2008-vintage 5D MkII had a 5-frame buffer! Your cameras are getting worse for astrophotography while Sonyโs are getting better.ย
SONY a7III
NIKON D750
CANON 6D Mk II
Nightscapes
Excellentย
Excellentย
Good
Time-Lapse
Goodย
Excellentย
Fair
Real-Time Video (Auroras)
Excellentย
Fairย
Poor
Wide-field Deep Sky
Goodย
Goodย
Excellentย
Telescopic Deep Sky
Fairย
Goodย
Excellentย
I trust you’ll find the review of value. Thanks for reading!
ADDENDUM as of JUNE 6, 2018
Since publishing the first results a number of people commented with suggestions for further testing, to check claims that:
The Sony would perform better for noise under dark sky conditions, at high ISOs, rather than the moonlit scene above. OK, let’s try that.
The Sony would perform better in an ISO Invariancy “face-off” if its ISOs were kept above 640, to keep all the images within the Sony’s upper ISO range of its dual-gain sensor design, with two ranges (100 to 400, and 640 on up). Fair enough.
What little “star-eater” effect I saw might be mitigated by shooting on Continuous drive mode or by firing the shutter with an external timer. That’s worth a check, too.
For the additional tests, I shot all images within a 3-hour span on the night of June 5/6, using the Sony a7III, Nikon D750, and Canon 6D MkII, with the respective lenses: the Laowa 15mm lens at f/2, the Sigma 14mm Art at f/2, and the Rokinon 14mm SP at f/2.5.
The cameras were on a Star Adventurer Mini tracker to keep stars pinpoints, though the ground blurred in the longer exposures.
DARK SKY NOISE TEST
I show only the Sony and Nikon compared here, shot at the common range of ISOs used for nightscape shooting, 800 to 12800. All images are equally well exposed. The inset image at right in Photoshop shows the scene, the Milky Way above dark trees in my backyard!
To the eye, the Sony and Nikon look very similar for noise levels, just as in the moonlit scene. Both are very good โ indeed, among the best performing cameras for high-ISO noise levels. But the Sony, being four years newer than the Nikon, is not better.
BUT … what the Sony did exhibit was better details in the shadows than the Nikon.
And this was with equal processing and no application of Shadow Recovery. This is where the Sony’s Backside Illuminated sensor with presumably higher quantum efficiency in gathering photons might be providing the advantage. With its good shadow details, you have to apply less shadow recovery in post-processing, which does keep noise down. So points to Sony here.
SONY vs NIKON HIGH ISO under DARK SKIES Noise levels appeared visually similar but the Sony showed more shadow details. Excellent!
I did put all the high ISO images through the classic noise reduction program Noise Ninja to measure total Luminance and Chrominance noise, and included the Canon 6D MkII’s images.
The resulting values and graph show the Sony actually measured worse for noise than the Nikon at each high ISO speed, 3200 to 12800, though with both performing much better than the Canon.
The higher noise of the Canon is visually obvious, but I’d say the Sony a7III and Nikon D750 are pretty equal visually for noise, despite the numbers.
COMPARING NOISE WITH NOISE NINJA
DARK SKY ISO INVARIANCY
Again, here I show only the Sony and Nikon, the two “ISO invariant” cameras. The correct exposure for the scene was 30 seconds at ISO 6400 and f/2. The images shown here were shot at lower ISOs to underexposure the dark scene by 2 to 4 stops or EV. Those underexposed images were then boosted later in processing (in Adobe Camera Raw) by the required Exposure Value to equalize the image brightness.
Contrary to expectations, the Sony did not show any great loss in image quality as it crossed the ISO 640 boundary into its lower ISO range. But the Nikon did show more image artifacts in the “odd-numbered” ISOs of 640 and 500. In this test, the Nikon did not perform as well as the Sony for ISO invariancy. Go figure!
Again, the differences are in images vastly underexposed. And both cameras performed much better than the ISO “variant” Canon in this test.
DARK SKY ISO INVARIANCY Here the Sony a7III performed well and better than the Nikon D750.
STAR EATER REVISITED
I shot images over a wide-range of exposures, from 2 seconds to 2 minutes, but show only the ones covering the 2-second to 4-second range, where the “star-eater” anti-aliasing or noise smoothing applied by Sony kicks in (above 3.2 seconds it seems).
I shot with the Sony a7III on Single shot drive mode, on Continuous Low drive mode (with the camera controlling the shutter speed in both cases), and a set with the Sony on Bulb and the shutter speed set by an external Vello intervalometer.
This is really pixel peeping at 400%. In Single drive mode, stars and noise soften ever so slightly at 4 seconds and higher. In Continuous mode, I think the effect is still there but maybe a little less. In shots on Bulb controlled by the External Timer, maybe the stars at 4 seconds are a little sharper still. But this is a tough call. To me, the star eater effect on the Sony a7III is a non-issue. It may be more serious on other Sony alphas.
STAR EATING vs DRIVE MODE This series shows star sharpness in images taken in Single and Continuous drive modes, and in Externally Timed exposures.
DE-BAYERING STAR ARTIFACTS
An issue that, to me, has a more serious effect on star quality is the propensity of the Sony, and to some extent the Nikon, to render tiny stars as brightly colored points, unrealistically so. In particular, many stars look green, from the dominance of green-filtered photosites on Bayer-array sensors.
Here I compare all three cameras for this effect in two-minute tracked exposures taken with Long Exposure Noise Reduction (i.e. in-camera dark frame subtraction) off and on.
The Sony shows a lot of green stars with or without LENR. The Nikon seems to discolor stars only when LENR is applied. Why would that be? The Canon is free of any such issue โ stars are naturally colored whether LENR dark frames are applied or not.
This is all with Raws developed with Adobe Camera Raw.
When opening the same Raws in other programs (ON1 Photo RAW, Affinity Photo, DxO PhotoLab, and Raw Therapee) the results can be quite different, with stars often rendered with fringes of hot, colored pixels. Or rendered with little or no color at all. Raw Therapee offers a choice of de-Bayering, or “de-mosaic,” routines, and each produces different looking stars, and none look great! Certainly not as good as the Canon rendered with Camera Raw.
What’s going on here is a mystery โ it’s a combination of the cameras’ unique Raw file formats, anti-alias filter in front of the sensor (or lack thereof in the Sony), and the de-Bayering routines of all the many Raw developers wrestling with the task of rendering stars that occupy only a few pixels. It’s unfair to blame just the hardware or the software.
But this test re-emphasized my thoughts that Canon DSLRs remain the best for long-exposure deep-sky imaging where you can give images as much exposure time as they need, while the ISO invariant Sony and Nikons exceed at nightscape shooting where exposures are often limited and plagued by dark shadows and noise.
COLORED STARS COMPARISON The Sony shows a propensity to render small stars in many vivid and unreal colors. The Nikon can do so after LENR is applied. The Canon is more neutral and natural.
So the pixel-peeping continues!
I hope you found these latest tests of interest.
โ Alan, May 31, 2018 / Revised June 6, 2018, March 27, 2019 and March 27, 2021 / ยฉ 2018 Alan Dyer / AmazingSky.com
Clear nights and a waxing Moon made for great opportunities to shoot the Badlands under moonlight.
This has not been a great spring. Only now is the last of the snow melting here in Alberta.
But some mild and clear nights this week with the waxing gibbous Moon allowed me to head to the Red Deer River valley near where I live in Alberta for some moonlit nightscapes.
Here’s the Big Dipper high overhead as it is in spring pointing down to Polaris.
I shot this and some other images in this gallery with the new Sony a7III mirrorless camera. A full test of its astrophoto abilities is in the works.
This is Jupiter rising, with the Moon lighting the sky, and illuminating the landscape. Moonlight is the same colour as sunlight, just much fainter. So while this might look like a daytime scene, it isn’t.
This is Venus setting in the evening twilight at the Hoodoos on Highway 10 near Drumheller. The winter stars are setting into the west, to disappear for a few months.
Here’s Venus in closeup, passing between the Hyades and Pleiades star clusters in Taurus, low in the twilight over the scenic Horsethief Canyon area of the Red Deer River.
While Venus is climbing higher into our evening sky this spring, the Pleiades, Hyades and all the winter stars are fast disappearing from view.
We say goodbye to winter, and not a moment too soon!
โ Alan, April 28, 2018 / ยฉ 2018 Alan Dyer / AmazingSky.com
On a very clear night, Orion shines over the skyline of Calgary.
As I live in the country, it’s not often I shoot the stars from urban sites, and certainly not from downtown Calgary. But the combination of a clear night and a speaking commitment in Calgary provided a chance to see what was possible under ideal conditions.
The lead image is real โ I did not paste an image of the sky taken at some other time or place over the skyline image.
However, the sky image is a longer exposure (10 seconds) than the ground (3 seconds) in order to bring out the stars better, while keeping the city lights under control with no overexposure. So it is sort of a high dynamic range blend.
The other factor that helped reveal stars as faint as shown here (fainter than what the naked eye can see) is the use of a light pollution reduction filter (a NISI Natural Night filter) to penetrate the yellow sky glow and provide a more pleasing colour to the sky.
Earlier in the night, during twilight when urban light pollution is not so much of an issue, I shot the waxing crescent Moon setting over the skyline.
This is a panorama image made from high dynamic range blends of various exposures, to again accommodate the large range in brightness in the scene. But I did not use the NISI filter here.
These images demonstrate how you can get fine astronomy images even from urban sites, with planning and timing.
To that end, I used my favourite app, The Photographer’s Ephemeris, to determine where the sky elements would be as seen from a couple of viewpoints over the city that I’ve used in the past.
The blue spheres in the left image of TPE in its Night mode represent the Milky Way. That chart also shows the direction toward Orion over the city core.
The right image of TPE in its Day mode shows the position of the Moon at 6 pm that evening, again showing it to the left of the urban core.
Other apps are capable of providing the same information, but I like TPE for its ease of use.
Clear skies!
โ Alan, January 20, 2018 / ยฉ 2018 Alan Dyer / AmazingSky.comย
Mars and Jupiter are meeting up in the morning sky. Soon they’ll be joined by the Moon.
Here’s a heads up for one of the best planet conjunctions of the year. Mars and Jupiter are now close together in the dawn sky to the south, and getting closer!
Above is the actual view on the morning of January 4, with Jupiter the brightest of a trio of objects. Mars is reddish and in the middle. The object at right is the star Alpha Librae, also known as Zubenelgenubi in Libra.
Looking south-southeast on January 6
As shown in the simulation above, on the morning of January 6 Mars and Jupiter will be only 1/3rd of a degree apart (20 arc minutes), so close that dimmer Mars might not be obvious to the naked eye next to bright Jupiter. But use binoculars to show the planet pair.
The next morning, on January 7, they will appear almost as close, as Jupiter climbs higher past Mars.
Looking south-southeast on January 11
As shown here, on the morning of January 11 the waning crescent Moon will sit only 4 degrees from the planet pair, with all three worlds gathered close enough for binoculars to frame the scene.
With sunrise coming late on winter mornings, it doesn’t take an early rise to take in the dawn scene. Make a note to take a look about 6:30 to 7:00 a.m. over the next week.
POSTSCRIPT added January 6:
Here’s the real scene from the morning of January 6, with Mars and Jupiter just 16 arc minutes apart, very close but still easy to distinguish ย with the naked eye. Jupiter did not overwhelm Mars.
Thanks and Clear skies!
โ Alan, January 4, 2018 / ยฉ 2018 Alan Dyer / amazingsky.com
To Adobe or not to Adobe. That is the question many photographers are asking with the spate of new image processing programs vying to โkill Photoshop.โ
I tested more than ten contenders as alternatives to Adobeโs image processing software, evaluating them ONLY for the specialized task of editing demanding nightscape images taken under the Milky Way, both for single still images and for time-lapses of the moving sky. I did not test these programs for other more “normal” types of images.
Also, please keep in mind, I am a Mac user and tested only programs available for MacOS, though many are also available for Windows. I’ve indicated these.
But I did not test any Windows-only programs. So sorry, fans of Paintshop Pro (though see my note at the end), Photoline, Picture Window Pro, or Xara Photo & Graphic Designer. They’re not here. Even so, I think you will find there’s plenty to pick from!
This review expands upon and updates mini-reviews I included in my Nightscapes and Time-Lapses eBook, shown at right.
If you are hoping thereโs a clear winner in the battle against Adobe, one program I can say does it all and for less cost and commitment, I didn’t find one.
However, a number of contenders offer excellent features and might replace at least one member of Adobeโs image processing suite.
For example, only four of these programs can truly serve as a layer-based editing program replacing Photoshop.
The others are better described as Adobe Lightroom competitors โย programs that can catalog image libraries and develop raw image files, with some offering adjustment layers for correcting color, contrast, etc. But as with Lightroom, layering of images โย to stack, composite, and mask them โ is beyond their ability.
For processing time-lapse sequences, however, we donโt need, nor can we use, the ability to layer and mask several images into one composite.
What we need for time-lapses is to:
Develop a single key raw file, then โฆ
Copy its settings to the hundreds of other raw files in the time-lapse set, then โฆ
Export that folder of raw images to โintermediate JPGsโ for assembly into a movie.
Even so, not all these contenders are up to the task.
Here are the image processing programs I looked at. Costs are in U.S. dollars. Most have free trial copies available.
The Champion from Adobe
Adobe Camera Raw (ACR), Photoshop, Bridge, and Lightroom, the standards to measure others by
Cost: $10 a month by subscription, includes ACR, Photoshop, Bridge, and Lightroom
Adobe Camera Raw (ACR) is the raw development plug-in that comes with Photoshop and Adobe Bridge, Adobeโs image browsing application that accompanies Photoshop. Camera Raw is equivalent to the Develop module in Lightroom, Adobeโs cataloguing and raw processing software. Camera Raw and Lightroom have identical processing functions and can produce identical results.
Photoshop and Lightroom complement each other and are now available together, but only by monthly subscription through Adobeโs Creative Cloud service, at $10/month. Though $120 for a year is not far off the cost of purchasing many of these other programs and perhaps upgrading them annually, many photographers prefer to purchase their software and not subscribe to it.
Thus the popularity of these alternative programs. Most offered major updates in late 2017.
My question is, how well do they work? Are any serious contenders to replace Photoshop or Lightroom?
Lightroom Contenders: Five Raw Developers
ACDSee Photo Studio (current as of late 2017)
Cost: $60 to $100, depending on version, upgrades $40 to $60.
I tested the single MacOS version. Windows users have a choice of either a Standard or Professional version. Only the Pro version offers the full suite of raw development features, in addition to cataloging functions. The MacOS version resembles the Windows Pro version.
Capture One v11 (late 2017 release)
Cost: $299, and $120 for major upgrades, or by subscription for $180/year
As of version 11 this powerful raw developer and cataloguing program offers โLayers.โ But these are only for applying local adjustments to masked areas of an image. You cannot layer different images. So Capture One cannot be used like Photoshop, to stack and composite images. It is a Lightroom replacement only, but a very good one indeed.
Hereโs a low cost Lightroom replacement for image management and raw processing abilities. Noise reduction is โPerfectly Clearโ from Athentech and works well.
The ELITE version of what DxO now calls โPhotoLabโ offers DxO’s superb PRIME noise reduction and excellent ClearView contrast enhancement feature. While it has an image browser, PhotoLab does not create a catalog, so this isnโt a full Lightroom replacement, but it is a superb raw developer. DxO also recently acquired the excellent Nik Collection of image processing plug-ins, so we can expect some interesting additions and features.
This free open source program has been created and is supported by a loyal community of programmers. It offers a bewildering blizzard of panels and controls, among them the ability to apply dark frames and flat field images, features unique among any raw developer and aimed specifically at astrophotographers. Yes, itโs free, but the learning curve is precipitous.
Photoshop Contenders: Four Raw Developers with Layering/Compositing
These programs can not only develop at least single raw images, if not many, but also offer some degree of image layering, compositing, and masking like Photoshop.
However, only ON1 Photo RAW can do that and also catalog/browse images as Lightroom can. Neither Affinity, Luminar, or Pixelmator offer a library catalog like Lightroom, nor even a file browsing function such as Adobe Bridge, serious deficiencies I feel.
This is the lowest cost raw developer and layer-based program on offer here, and has some impressive features, such as stacking images, HDR blending, and panorama stitching. However, it lacks any library or cataloguing function, so this is not a Lightroom replacement, but it could replace Photoshop.
Macphun has changed their name to Skylum and now makes their fine Luminar program for both Mac and Windows. While adding special effects is its forte, Luminar does work well both as a raw developer and layer-based editor. But like Affinity, it has no cataloguing feature. It cannot replace Lightroom.
Of all the contenders tested here, this is the only program that can truly replace both Lightroom and Photoshop, in that ON1 has cataloguing, raw developing, and image layering and masking abilities. In fact, ON1 allows you to migrate your Lightroom catalog into its format. However, ON1โs cost to buy and maintain is similar to Adobeโs Creative Cloud Photo subscription plan. Itโs just that ON1โs license is โperpetual.โ
NOTE: Windows users might find Corel’s Paintshop Pro 2018 a good “do-it-all” solution โ I tested only Corel’s raw developer program Aftershot Pro, which Paintshop Pro uses.
The โProโ version of Pixelmator was introduced in November 2017. It has an innovative interface and many fine features, and it allows layering and masking of multiple images. However, it lacks some of the key functions (listed below) needed for nightscape and time-lapse work. Touted as a Photoshop replacement, it isnโt there yet.
The Challenge
This is the image I threw at all the programs, a 2-minute exposure of the Milky Way taken at Writing-on-Stone Provincial Park in southern Alberta in late July 2017.
NOTE: Click/tap on any of the screen shots to bring them up full screen so you can inspect and save them.ย
Original Raw Image Out of the Camera, BEFORE Development
The lens was the Sigma 20mm Art lens at f/2 and the camera the Nikon D750 at ISO 1600.
Thus the ground is blurred. Keep that in mind, as it will always look fuzzy in the comparison images. But it does show up noise well, including hot pixels. This image of the sky is designed to be composited with one taken without the tracker turning, to keep the ground sharp.
Raw Image AFTER Development in Adobe Camera Raw
Above is the image after development in Adobe Camera Raw (ACR), using sliders under its Basic, Tone Curve, Detail, HSL, Lens Corrections, and Effects tabs. Plus I added a โlocal adjustmentโ gradient to darken the sky at the top of the frame. I judged programs on how well they could match or beat this result.
Same Image Developed in Adobe Lightroom
Above is the same image developed in Adobe Lightroom, to demonstrate how it can achieve identical results to Camera Raw, because at heart it is Camera Raw.
Feature Focus
I have assumed a workflow that starts with raw image files from the camera, not JPGs, for high-quality results.
And I have assumed the goal of making that raw image look as good as possible at the raw stage, before it goes to Photoshop or some other bit-mapped editor. Thatโs an essential workflow for time-lapse shooting, if not still-image nightscapes.
However, I made no attempt to evaluate all these programs for a wide range of photo applications. That would be a monumental task!
Nor, in the few programs capable of the task, did I test image layering. My focus was on developing a raw image. As such, I did not test the popular free program GIMP, as it does not open raw files. GIMP users must turn to one of the raw developers here as a first stage.
If you are curious how a program might perform for your purposes and on your photos, then why not test drive a trial copy?
Instead, my focus was on these programsโ abilities to produce great looking results when processing one type of image: my typical Milky Way nightscape, below.
TIFF Exported from DxO PhotoLab … then Imported into Photoshop
Such an image is a challenge becauseโฆ
The subject is inherently low in contrast, with the sky often much brighter than the ground. The sky needs much more contrast applied, but without blocking up the shadows in the ground.
The sky is often plagued by off-color tints from artificial and natural sky glows.
The ground is dark, perhaps lit only by starlight. Bringing out landscape details requires excellent shadow recovery.
Key to success is superb noise reduction. Images are shot at high ISOs and are rife with noise in the shadows. We need to reduce noise without losing stars or sharpness in the landscape.
I focused on being able to make one image look as good as possible as a raw file, before bringing it into Photoshop or a layer-based editor โย though thatโs where it will usually end up, for stacking and compositing, as per the final result shown at the end.
I then looked at each programโs ability to transfer that one key imageโs settings over to what could be hundreds of other images taken that night, either for stacking into star trails or for assembling into a time-lapse movie.
Summary Conclusions
Results of 8 Programs compared to ACR (at left)
None of the programs I tested ticked all the boxes in providing all the functions and image quality of the Adobe products.
But hereโs a summary of my recommendations:
For Advanced Time-Lapse
None of the non-Adobe programs will work with the third-party software LRTimelapse (www.lrtimelapse.com). It is an essential tool for advanced time-lapse processing. LRTimelapse works with Lightroom or ACR/Bridge to gradually shift processing settings over a sequence, and smooth annoying image flickering.
If serious and professional time-lapse shooting is your goal, none of the Adobe contenders will work. Period. Subscribe to Creative Cloud. And buy LRTimelapse.
For Basic Time-Lapse
However, for less-demanding time-lapse shooting, when the same settings can be applied to all the images in a sequence, then I feel the best non-Adobe choices are, in alphabetical order:
ACDSee
Capture One
Corel Aftershot Pro
DxO PhotoLab
ON1 Photo RAW
โฆ With, in my opinion, DxO and Capture One having the edge for image quality and features. But all five have a Library or Browser mode with easy-to-use Copy & Paste and Batch Export functions needed for time-lapse preparation.
Also worth a try is PhotoDirector9 (MacOS and Windows), a good Lightroom replacement. Scroll to the end for more details and a link.
For Still Image Nightscapes
If you are processing just individual still images, perhaps needing only to stack or composite a few exposures, and want to do all the raw development and subsequent layering of images within one non-Adobe program, then look at (again alphabetically):
Affinity Photo
Luminar 2018
ON1 Photo RAW 2018
โฆ With Affinity Photo having the edge in offering a readily-available function off its File menu for stacking images, either for noise smoothing (Mean) or creating star trails (Maximum).
However, I found its raw development module did not produce as good a result as most competitors due to Affinityโs poorer noise reduction and less effective shadow and highlight controls. Using Affinityโs โDevelop Personaโ module, I could not make my test image look as good as with other programs.
Luminar 2018 has better noise reduction but it demands more manual work to stack and blend images.
While ON1 Photo Raw has some fine features and good masking tools, it exhibits odd de-Bayering artifacts, giving images a cross-hatched appearance at the pixel-peeping level. Sky backgrounds just arenโt smooth, even after noise reduction.
To go into more detail, these are the key factors I used to compare programs.
Noise Reduction
Absolutely essential is effective noise reduction, of luminance noise and chrominance color speckles and splotches.
Ideally, programs should also have a function for suppressing bright โhotโ pixels and dark โdeadโ pixels.
Hereโs what I consider to be the โgold standardโ for noise reduction, Adobe Camera Rawโs result using the latest processing engine in ACR v10/Photoshop CC 2018.
BEFORE and AFTER Noise Reduction with Adobe Camera Raw (ACR)
I judged other programs on their ability to produce results as good as this, if not better, using their noise reduction sliders. Some programs did better than others in providing smooth, noiseless skies and ground, while retaining detail.
BEFORE and AFTER Noise Reduction and Other Adjustments with DxO PhotoLab
For example, one of the best was DxO PhotoLab, above. It has excellent options for reducing noise without being overwhelming in its choices, the case with a couple of other programs. For example, DxO has a mostly effective dead/hot pixel removal slider.
ACR does apply such a hot pixel removal โunder the hoodโ as a default, but often still leaves many glaring hot specks that must be fixed later in Photoshop.
Comparing Noise Reduction
300% Close-Ups to Compare Noise Reduction
Above are 8 of the contender programs compared to Camera Raw for noise reduction.
Missing from this group is the brand new Pixelmator Pro, for MacOS only. It does not yet have any noise reduction in its v1 release, a serious deficiency in imaging software marketed as โPro.โ For that reason alone, I cannot recommend it. I describe its other deficiencies below.
Lens Corrections
The wide-angle lenses we typically use in nightscape and time-lapse imaging suffer from vignetting and lens distortions. Having software that can automatically detect the lens used and apply bespoke corrections is wonderful.
Lens Corrections in Capture One
Only a few programs, such as Capture One (above), have a library of camera and lens data to draw upon to apply accurate corrections with one click. With others you have to dial in corrections manually by eye, which is crude and inaccurate.
Shadows and Highlights
All programs have exposure and contrast adjustments, but the key to making a Milky Way nightscape look good is being able to boost the shadows (the dark ground) while preventing the sky from becoming overly bright, yet while still applying good contrast to the sky.
Shadows and Highlight and other Enhancements in DxO PhotoLab
Of the contenders, I liked DxO PhotoLab best (shown above), not only for its good shadow and highlight recovery, but also excellent โSmart Lightingโ and โClearViewโ functions which served as effective clarity and dehaze controls to snap up the otherwise low-contrast sky. With most other programs it was tough to boost the shadows without also flattening the contrast.
On the other hand, Capture Oneโs excellent layering and local adjustments did make it easier to brush in adjustments just to the sky or ground.
However, any local adjustments like those will be feasible only for still images or time-lapses where the camera does not move. In any motion control sequences the horizon will be shifting from frame to frame, making precise masking impractical over a sequence of hundreds of images.
Therefore, I didnโt place too much weight on the presence of good local adjustments. But they are nice to have. Capture One, DxO PhotoLab, and ON1 win here.
Selective Color Adjustments
All programs allow tweaking the white balance and overall tint.
But itโs beneficial to also adjust individual colors selectively, to enhance red nebulas, enhance or suppress green airglow, bring out green grass, or suppress yellow or orange light pollution.
Some programs have an HSL panel (Hue, Saturation, Lightness) or an equalizer-style control for boosting or dialing back specific colors.
Color Adjustments in Capture One
Capture One (above) has the most control over color correction, with an impressive array of color wheels and sliders that can be set to tweak a broad or narrow range of colors.
And yet, despite this, I was still unable to make my test image look quite the way I wanted for color balance. ACR and DxO PhotoLab still won out for the best looking final result.
Copy and Paste Settings
Even when shooting nightscape stills we often take several images to stack later. Itโs desirable to be able to process just one image, then copy and paste its settings to all the others in one fell swoop. And then to be able to inspect those images in thumbnails to be sure they all look good.
Some programs (Affinity Photo, Luminar, Pixelmator Pro) lack any library function for viewing or browsing a folder of thumbnail images. Yes, you can export a bunch of images with your settings applied as a user preset, but thatโs not nearly as good as actually seeing those images displayed in a Browser mode.
Copy and Paste Settings in ON1 Photo RAW
Whatโs ideal is a function such as ON1 Photo RAW displays here, and that some other programs have: the ability to inspect a folder of images, work on one, then copy and paste its settings to all the others in the set.
This is absolutely essential for time-lapse work, and nice to have even when working on a small set to be stacked into a still image.
Batch Export
Once you develop a folder of raw images with โCopy and Paste,โ you now have to export them with all those settings โbaked intoโ the exported files.
This step is to create an intermediate set of JPGs to assemble into a movie. Or perhaps to stack into a star trail composite using third party software such as StarStaX, or to work on the images in another layer-based program of your choice.
Batch Export in ON1 Photo RAW
As ON1 Photo RAW shows above, this is best done using a Library or Browser mode to visually select the images, then call up an Export panel or menu to choose the image size, format, quality, and location for the exports.
Click Export and go for coffee โ or a leisurely dinner โ while the program works through your folder. All programs took an hour or more to export hundreds of images.
Design
Those functions were the key features I looked for when evaluating the programs for nightscape and time-lapse work.
Every program had other attractive features, often ones I wished were in Adobe Camera Raw. But if the program lacked any of the above features, I judged it unsuitable.
Yes, the new contenders to the Photoshop crown have the benefit of starting from a blank slate for interface design.
Luminar 2018’s Clean User Interface
Many, such as Luminar 2018 above, have a clean, attractive design, with less reliance on menus than Photoshop.
Photoshop has grown haphazardly over 25 years, resulting in complex menus. Just finding key functions can take many tutorial courses!
But Adobe dares to โimproveโ Photoshop’s design and menu structure at its peril, as Photoshop fans would scream if any menus they know and love were to be reorganized!
The new mobile-oriented Lightroom CC is Adobeโs chance to start afresh with a new interface.
Summary Table of Key Features
Click or tap to view and save full screen version.
Fair = Feature is present but doesnโt work as easily or produce as good a result
Partial = Program has lens correction but failed to fully apply settings automatically / DxO has a Browse function but not Cataloging
Manual = Program has only a manually-applied lens correction
โ = Program is missing that feature altogether
Program-by-Program Results
I could end the review here, but I feel itโs important to present the evidence, in the form of screen shots of all the programs, showing both the whole image, and a close-up to show the all-important noise reduction.
ACDSee Photo Studio
ACDSee Full Screen
ACDSee Enlargement
PROS: This capable cataloging program has good selective color and highlight/shadow recovery, and pretty smooth noise reduction. It can copy and paste settings and batch export images, for time-lapses. It is certainly affordable, making it a low-cost Lightroom contender.
CONS: It lacks any gradient or local adjustments, or even spot removal brushes. Lens corrections are just manual. There is no dehaze control, which can be useful for snapping up even clear night skies. You cannot layer images to create composites or image stacks. This is not a Photoshop replacement.
Affinity Photo
Affinity Photo Full Screen
Affinity Photo Enlargement
PROS: Affinity supports image layers, masking with precise selection tools, non-destructive โliveโ filters (like Photoshopโs Smart Filters), and many other Photoshop-like functions. It has a command for image stacking with a choice of stack modes for averaging and adding images.
Itโs a very powerful but low cost alternative to Photoshop, but not Lightroom. It works fine when restricted to working on just a handful of images.
CONS: Affinity has no lens correction database, and I found it hard to snap up contrast in the sky and ground without washing them out, or having them block up. Raw noise reduction was acceptable but not up to the best for smoothness. It produced a blocky appearance. There are no selective color adjustments.
Nor is there any library or browse function. You can batch export images, but only through an unfriendly dialog box that lists images only by file name โ you cannot see them. Nor can you copy and paste settings visually, but only apply a user-defined โmacroโ to develop images en masse upon export.
This is not a program for time-lapse work.
Capture One 11
Capture One 11 Full Screen
Capture One 11 Enlargement
PROS: With version 11 Capture One became one of the most powerful raw developers, using multiple layers to allow brushing in local adjustments, a far better method than Adobe Camera Rawโs local adjustment โpins.โ It can create a catalog from imported images, or images can be opened directly for quick editing. Its noise reduction was good, with hot pixel removal lacking in Camera Raw.
Its color correction options were many!
It can batch export images. And it can export files in the raw DNG format, though in tests only Adobe Camera Raw was able to read the DNG file with settings more or less intact.
CONS: Itโs costly to purchase, and more expensive than Creative Cloud to subscribe to. Despite all its options I could never quite get as good looking an image using Capture One, compared to DxO PhotoLab for example.
It is just a Lightroom replacement; it canโt layer images.
Corel Aftershot Pro 3
Corel Aftershot Pro Full Screen
Corel Aftershot Pro Enlargement
PROS: This low-cost option has good noise reduction using Athentechโs Perfectly Clear process, with good hot pixel or โimpulseโ noise removal. It has good selective color and offers adjustment layers for brushing in local corrections. And its library mode can be used to copy and paste settings and batch export images.
Again, itโs solely a Lightroom alternative.
CONS: While it has a database of lenses, and identified my lens, it failed to apply any automatic corrections. Its shadow and highlight recovery never produced a satisfactory image with good contrast. Its local adjustment brush is very basic, with no edge detection.
DxO PhotoLab
DxO PhotoLab Full Screen
DxO PhotoLab Enlargement
PROS: I found DxO produced the best looking image, better perhaps than Camera Raw, because of its DxO ClearView and Smart Lighting options. It has downloadable camera and lens modules for automatic lens corrections. Its noise reduction was excellent, with its PRIME option producing by far the best results of all the programs, better perhaps than Camera Raw, plus with hot pixel suppression.
DxO has good selective color adjustments, and its copy and paste and batch export work fine.
CONS: There are no adjustment layers as such. Local adjustments and repairing are done through the unique U-Point interface which works something like ACRโs โpins,โ but isnโt as visually intuitive as masks and layers. Plus, DxO is just a raw developer; there is no image layering or compositing. Nor does it create a catalog as such.
So it is not a full replacement for either Lightroom or Photoshop. But it does produce great looking raw files for export (even as raw DNGs) to other programs.
Luminar 2018
Luminar 2018 Full Screen
Luminar 2018 Enlargement
PROS: Luminar has good selective color adjustments, a dehaze control, and good contrast adjustments for highlights, mid-tones, and shadows. Adjustments can be added in layers, making them easier to edit. Noise reduction was smooth and artifact-free, but adjustments were basic. Many filters can be painted on locally with a brush, or with a radial or gradient mask.
CONS: It has no lens correction database; all adjustments are manual. The preview was slow to refresh and display results when adjusting filters. The interface is clean but always requires adding filters to the filter panel to use them when creating new layers. Its batch export is crude, with only a dialog box and no visual browser to inspect or select images.
Settings are applied as a user preset on export, not through a visual copy-and-paste function. I donโt consider that method practical for time-lapses.
ON1 Photo RAW 2018
ON1 Photo RAW Full Screen
ON1 Photo RAW Enlargement
PROS: ON1 is the only program of the bunch that can: catalog images, develop raw files, and then layer and stack images, performing all that Lightroom and Photoshop can do. It is fast to render previews in its โFastโ mode, but in its โAccurateโ mode ON1 is no faster than Lightroom. It has good layering and masking functions, both in its Develop mode and in its Photoshop-like Layers mode.
Selective color and contrast adjustments were good, as was noise reduction. Developing, then exporting a time-lapse set worked very well, but still took as long as with Lightroom or Photoshop.
CONS: Despite promising automatic lens detection and correction, ON1 failed to apply any vignetting correction for my 20mm Sigma lens. Stars exhibited dark haloes, even with no sharpening, dehaze, or noise reduction applied. Its de-Bayering algorithm produced a cross-hatched pattern at the pixel level, an effect not seen on other programs.
Noise reduction did not smooth this. Thus, image quality simply wasnโt as good.
Pixelmator Pro
Pixelmator Pro Full Screen
Pixelmator Pro Enlargement
PROS: It is low cost. And it has an attractive interface.
CONS: As of version 1 released in November 2017 Pixelmator Pro lacks: any noise reduction (itโs on their list to add!), any library mode or copy and paste function, nor even the ability to open several images at once displayed together.
It is simply not a contender for โPhotoshop killerโ for any photo application, despite what click-bait โreviewsโ promise, ones that only re-write press releases and donโt actually test the product.
Raw Therapee v5.3
Raw Therapee Full Screen
Raw Therapee Enlargement โ With and Without Noise Reduction
PROS: Itโs free! It offers an immense number of controls and sliders. You can even change the debayering method. It detects and applies lens corrections (though in my case only distortion, not vignetting). It has good selective color with equalizer-style sliders. It has acceptable (sort of!) noise reduction and sharpening with a choice of methods, and with hot and dead pixel removal.
It can load and apply dark frames and flat fields, the only raw developer software that can. This is immensely useful for deep-sky photography.
CONS: It offers an immense number of controls and sliders! Too many! It is open source software by committee, with no one in charge of design or user friendliness. Yes, there is documentation, but it, too, is a lot to wade through to understand, especially with its broken English translations. This is software for digital signal processing geeks.
But worst of all, as shown above, its noise reduction left lots of noisy patches in shadows, no matter what combination of settings I applied. Despite all its hundreds of sliders, results just didnโt look as good.
What About โฆ? (updated December 28)
No matter how many programs I found to test, someone always asks, “What about …?” In some cases such comments pointed me to programs I wasn’t even aware of, but subsequently tried out. So here are even more to pick from…
Billed as having โeverything you need in an image editor,โ this low-cost ($30) MacOS-only program is anything but. Its raw developer module is crude and lacks any of the sophisticated range of adjustments offered by all the other programs on offer here. It might be useful as a layer-based editor of images developed by another program.
Available for Mac and Windows for $150, this Lightroom competitor offers a good browser function, with the ability to โcopy-from-one and paste-to-manyโ images (unlike some of the programs below), and a good batch export function for time-lapse work. It has good selective color controls and very good noise reduction providing a smooth background without artifacts like blockiness or haloes. Local adjustments, either through brushed-on adjustments or through gradients, are applied via handy and easy to understand (I think!) layers.
While it has auto lens corrections, its database seemed limited โ it did not have my Sigma 20mm lens despite it being on the market for 18 months. Manual vignetting correction produced a poor result with just a washed out look.
The main issue was that its shadow, highlight, and clarity adjustments just did not produce the snap and contrast I was looking for, but that other programs could add to raw files. Still, it looks promising, and is worth a try with the trial copy. You might find you like it. I did not. For similar cost, other programs did a better job, notably DxO PhotoLab.
In the same ilk as Raw Therapee, I also tested out another free, open-source raw developer, one simply called โdarktable,โ with v2.2.5 shown below. While it has some nice functions and produced a decent result, it took a lot of time and work to use.
darktable RAW Developer
The MacOS version I tried (on a brand new 5K iMac) ran so sluggishly, taking so long to re-render screen previews, that I judged it impractical to use. Sliders were slow to move and when I made any adjustments often many seconds would pass before I would see the result. Pretty frustrating, even for free.
A similar crowd-developed raw processing program, Iridient Developer (above), sells for $99 US. I tested a trial copy of v3.2. While it worked OK, I was never able to produce a great looking image with it. It had no redeeming features over the competition that made its price worthwhile.
Paintshop Pro’s included but very basic Raw developer.
Using Parallels running Windows 10 on my Mac, I did try out this popular Windows-only program from Corel. By itself, Paintshop Proโs raw developer module (shown above) is basic, crude and hardly up to the tax of processing demanding raw files. You are prompted to purchase Corelโs Aftershot Pro for more capable raw development, and I would agree โ Aftershot would be an essential addition. However …
As I showed above, I did test the MacOS version of Aftershot Pro on my raw sample image, and found it did the poorest job of making my raw test image look good. Keep in mind that it is the ability of all these programs to develop this typical raw nightscape image that I am primarily testing.
That said, given a well-developed raw file, Paintshop Pro can do much more with it, such as further layering of images and applying non-destructive and masked adjustment layers, as per Photoshop. Indeed, it is sold as a low-cost (~ $60) Photoshop replacement. As such, many Windows users find Paintshopโs features very attractive. However, Paintshop lacks the non-destructive โsmartโ filters, and the more advanced selection and masking options offered by Photoshop, Affinity Photo, and ON1 Photo Raw. If you have never used these, you likely donโt realize what you are missing.
If itโs an Adobe alternative you are after, I would suggest Windows users would be better served by other options. Why not test drive Affinity and ON1?
PhotoDirector’s very Lightroom-like interface and controls.
This was a surprising find. Little known, certainly to me, this Windows and MacOS program from the Taiwanese company Cyberlink, is best described as a Lightroom substitute, but itโs a good one. Its regular list price is $170. I bought it on sale for $60.
Like Lightroom, working on any images with PhotoDirector requires importing them into a catalog. You cannot just browse to the images. Fine. But one thing some people complain about with Lightroom is the need to always import images.
I was impressed with how good a job PhotoDirector did on my raw test image. PhotoDirector has excellent controls for shadow and highlight recovery, HSL selective color, copying-and-pasting settings, and batch exporting. So it will work well for basic time-lapse processing.
Noise reduction was very good and artifact-free. While it does have automatic lens corrections, its database did not include the 2-year old Sigma 20mm Art lens I used. So it appears its lens data is not updated frequently.
PhotoDirector has good local adjustments and gradients using โpinsโ rather than layers, similar to Camera Raw and Lightroom.
After performing raw image โAdjustments,โ you can take an image into an Edit module (for adding special effects), then into a Layers module for further work. However, doing so destructively โflattensโ the image to apply the raw adjustments you made. You cannot go back and tweak the raw settings in the Adjustment module, as you can when opening a raw file as a โsmart objectโ in Adobe Photoshop.
While PhotoDirector does allow you to layer in other images to make basic composites (such as adding type or logos), there is no masking function nor any non-destructive adjustment layers. So this is most assuredlyย not a Photoshop substitute, despite what the advertising might suggest. But if itโs a Lightroom replacement you are after, do check it out in a trial copy.
MacOS-only Picktorial v3, with its clean interface
This little-known MacOS-only program (only $40 on sale) for developing raw images looks very attractive, with good selective color, lots of local adjustments, and good masking tools, the features promoted on the website. It does have a browse function and can batch export a set of developed files.
However โฆ its noise reduction was poor, introducing glowing haloes around stars when turned up to any useful level. Its shadows, highlights, and contrast adjustments were also poor โย it was tough to make the test image look good without flattening contrast or blocking up shadows. Boosting clarity even a little added awful dark haloes to stars, making this a useless function. It has no lens correction, either automatic or manual. Like Topaz Studio, below, it cannot copy and paste settings to a batch of images, only to one image at a time, so it isn’t useful for time-lapse processing.
I cannot recommend this program, no matter how affordable it might be.
Popular among some camera manufacturers as their included raw developer, Silky Pix can be purchased separately ($80 list price for the standard version, $250 list price for the Pro version) with support for many camerasโ image files. It is available for MacOS and Windows. I tried the lower-cost โnon-Proโ version 8. It did produce a good-looking end result, with good shadow and highlight recovery, and excellent color controls. Also on the plus side, Silky Pix has very good copy-and-paste functions for development settings, and good batch export functions, so it can be used to work on a folder of time-lapse frames.
On the down side, noise reduction, while acceptable, left an odd mottled pattern, hardly โsilky.โ The added โNeatโ noise reduction option only smoothed out detail and was of little value except perhaps for very noisy images. Noise reduction did nothing to remove hot pixels, leaving lots of colored specks across the image. The program uses unorthodox controls whose purposes are not obvious. Instead ofย Highlights and Shadows you get Exposure Bias and HDR. Instead of Luminance and Color noise reduction, you get sliders labeled Smoothness and Color Distortion. You really need to read the extensive documentation to learn how to use this program.
I found sliders could be sticky and not easy to adjust precisely. The MacOS version was slow, often presenting long bouts of spinning beachballs while it performed some function. This is a program worth a try, and you might find you like it. But considering what the competition offers, I would not recommend it.
While Topaz Labs previously offered only plug-ins for Photoshop and other programs (their Topaz DeNoise 6 is very good), their Topaz Studio stand-alone program now offers full raw processing abilities.
It is for Mac and Windows. While it did a decent job developing my test Milky Way image (above), with good color and contrast adjustments, it cannot copy and paste settings from one image to a folder of images, only to one other image. Nor can it batch export a folder of images. Both deficiencies make it useless for time-lapse work.
In addition, while the base program is free, adding the โPro Adjustmentsโ modules I needed to process my test image (Noise Reduction, Dehaze, Precision Contrast, etc.) would cost $160 โ each Adjustment is bought separately. Some users might like it, but I wouldnโt recommend it.
And … Adobe Photoshop Elements v18 (late 2017 release)
What about Adobeโs own Photoshop โLite?โ Elements is available for $99 as a boxed or downloadable one-time purchase, but with annual updates costing about $50. While it offers image and adjustment layers, it cannot do much with 16-bit images, and has very limited functions for developing raw files.
And its Lightroom-like Organizer module doesย not have any copy-and-paste settings or batch export functions, making it unsuitable for time-lapse production.
Photoshop Elements v18 โ Showing its Version of Camera Raw Lite
Elements is for processing photos for the snapshot family album. Like Appleโs Photos and other free photo apps, I donโt consider Elements to be a serious option for nightscape and time-lapse work. But it can be pressed into service for raw editing and layering single images, especially by beginners.
However, a Creative Cloud Photo subscription doesnโt cost much more than buying, then upgrading Elements outright, yet gets you far, far more in professional-level software.
And Yet Moreโฆ!
In addition, for just developing raw files, you likely already have software to do the job โ the program that came with your camera.
Canon Digital Photo Professional v4
For Canon itโs Digital Photo Professional (shown above); for Nikon itโs Capture NX; for Pentax itโs Digital Camera Utility, etc.
These are all capable raw developers, but have no layering capabilities. And they read only the files from their camera brand. If theirs is the only software you have, try it. They are great for learning on.
But youโll find that the programs from other companies offer more features and better image quality.
What Would I Buy?
Except for Capture One, which I tested as a trial copy, I did buy all the software in question, for testing for my Nightscapes eBook.
However, as Iโve described, none of the programs tick all the boxes. Each has strengths, but also weaknesses, if not outright deficiencies. I donโt feel any can fully replace Adobe products for features and image quality.
A possible non-Adobe combination for the best image quality might be DxO PhotoLab for raw developing and basic time-lapse processing, and Affinity Photo for stacking and compositing still images, from finished TIFF files exported out of DxO and opened and layered with Affinity.
But that combo lacks any cataloging option. For that youโd have to add ACDSee or Aftershot for a budget option. Itโs hardly a convenient workflow Iโd want to use.
ON1 De-Bayer Artifacts (Right) Compared to DxO PhotoLab (Left), at 400%
Iโd love to recommend ON1 Photo RAW more highly as a single solution, if only it had better raw processing results, and didnโt suffer from de-Bayering artifacts (shown in a 400% close-up above, compared to DxO PhotoLab). These add the star haloes and a subtle blocky pattern to the sky, most obvious at right.
To Adobe or Not to Adobe
Iโm just not anxious, as others are, to โavoid Adobe.โ
Iโve been a satisfied Creative Cloud subscriber for several years, and view the monthly fee as the cost of doing business. Itโs much cheaper than the annual updates that boxed Photoshop versions used to cost. Nor am I worried about Adobe suddenly jacking up the fees or holding us hostage with demands.
LRTimelapse at Work on a Time-Lapse Sequence
For me, the need to use LRTimelapse (shown above) for about 80 percent of all the time-lapse sequences I shoot means the question is settled. LRTimelapse works only with Adobe software, and the combination works great. Sold.
I feel Camera Raw/Lightroom produces results that others can only just match, if that.
Only DxO PhotoLab beat Adobe for its excellent contrast enhancements and PRIME noise reduction.
Yes, other programs certainly have some fine features I wish Camera Raw or Lightroom had, such as:
Hot and dead pixel removal
Dark frame subtraction and flat field division
Better options for contrast enhancement
And adding local adjustments to raw files via layers, with more precise masking tools
Among others!
But those arenโt โmust haves.โ
Using ACR or Lightroom makes it easy to export raw files for time-lapse assembly, or to open them into Photoshop for layering and compositing, usually as โsmart objectsโ for non-destructive editing, as shown below.
Final Layered Photoshop Image
Above is the final layered image, consisting of:
A stack of 4 tracked exposures for the sky (the test image is one of those exposures)
And 4 untracked exposures for the ground.
The mean stacking smooths noise even more. The masking reveals just the sky on the tracked set. Every adjustment layer, mask, and “smart filter” is non-destructive and can be adjusted later.
Iโll work on recreating this same image with the three non-Adobe programs capable of doing so โย Affinity, Luminar, and ON1 Photo RAW โย to see how well they do. But thatโs the topic of a future blog.
Making the Switch?
The issue with switching from Adobe to any new program is compatibility.
While making a switch will be fine when working on all new images, reading the terabytes of old images I have processed with Adobe software (and being able to re-adjust their raw settings and layered adjustments) will always require that Adobe software.
If you let your Creative Cloud subscription lapse, as I understand it the only thing that will continue to work is Lightroomโs Library module, allowing you to review images only. You canโt do anything to them.
None of the contender programs will read Adobeโs XMP metadata files to display raw images with Adobeโs settings intact.
Conversely, nor can Adobe read the proprietary files and metadata other programs create.
With final layered Photoshop files, while some programs can read .PSD files, they usually open them just as flattened images, as ON1 warns it will do above. It flattened all of the non-destructive editing elements created in Photoshop. Luminar did the same.
A Layered Photoshop PSB File Opened in Affinity Photo
Only Affinity Photo (above) successfully read a complex and very large Photoshop .PSB file correctly, honouring at least its adjustment and image layers. So, if backwards compatibility with your legacy Photoshop images is important, choose Affinity Photo.
However, Affinity flattened Photoshopโs smart object image layers and their smart filters. Even Adobe’s own Photoshop Elements doesnโt honor smart objects.
Lest you think thatโs a โwalled gardenโ created by “evil Adobe,” keep in mind that the same will be true of the image formats and catalogs that all the contender programs produce.
To read the adjustments, layers, and โlive filtersโ you create using any another program, you will need to use that program.
Will Affinity, DxO, Luminar, ON1, etc. be around in ten years?
Yes, you can save out flattened TIFFs that any program can read in the future, but that rules out using those other programs to re-work any of the imageโs original settings.
In Conclusion!
U-Point Local Adjustments in DxO PhotoLab
I can see using DxO PhotoLab (above) or Raw Therapee for some specific images that benefit from their unique features.
Or using ACDSee as a handy image browser.
Luminar 2018 as a Plug-In Within Photoshop
And ON1 and Luminar have some lovely effects that can be applied by calling them up as plug-ins from within Photoshop, and applied as smart filters. Above, I show Luminar working as a plug-in, applying its “Soft & Airy” filter.
In the case of Capture One and DxO PhotoLab, their ability to save images back as raw DNG files (the only contender programs of the bunch that can), means that any raw processing program in the future should be able to read the raw image.
DNG Raw File Created by Capture One Opened in ACR
However, only Capture Oneโs Export to DNG option produced a raw file readable and editable by Adobe Camera Raw with its settings from Capture One (mostly) intact (as shown above).
Even so, I wonโt be switching away from Adobe any time soon.
But I hope my survey has given you useful information to judge whether you should make the switch. And if so, to what program.
Thanks!ย
โ Alan, December 6, 2017 / ยฉ 2017 Alan Dyer / AmazingSky.com
The clouds cleared to present a magical night under the Moon in the Badlands of southern Alberta.
At last, a break in the incessant clouds of November, to provide me with a fine night of photography at one of my favourite places, Dinosaur Provincial Park, declared a U.N. World Heritage Site for its deposits of late Cretaceous fossils.
I go there to shoot the night sky over the iconic hoodoos and bentonite clay hills.
November is a great time to capture the equally iconic constellation of Orion rising in the east in the early evening. The scene is even better if there’s a Moon to light the landscape.
November 27 presented the ideal combination of circumstances: clear skies (at least later at night), and a first quarter Moon to provide enough light without washing out the sky too much and positioned to the south and west away from the target of interest โ Orion and the winter sky rising in the east.
Below is a slide show of some of the still images I shot, all with the Canon 6D MkII camera and fine Rokinon 14mm f/2.5 lens, used wide open. Most are 15-second exposures, untracked.
This slideshow requires JavaScript.
I kept another camera, the Nikon D750 and Sigma 24mm Art lens, busy all night shooting 1200 frames for a time-lapse of Orion rising, with clouds drifting through, then clearing.
Below is the resulting video, presented in two versions: first with the original but processed frames assembled into a movie, followed by a version where the movie frames show accumulating star trails to provide a better sense of sky motion.
To create the frames for this version I used the Photoshop actions Advanced Stacker Plus, from StarCircleAcademy. They can stack images then export a new set of frames each with the tapering trails, which you then assemble into a movie. I also used it to produce the lead image at top.
The techniques and steps are all outlined in my eBook, highlighted at top right.
The HD movie is just embedded here, and is not published on Vimeo or YouTube. Expand to fill your screen.
To help plan the shoot I used the astronomy software Starry Night, and the photo planning software The Photographer’s Ephemeris, or TPE. With it, you can place yourself at the exact spot to see how the Sun, Moon and stars will appear in sightlines to the horizon.
Here’s the example screen shot. The spheres across the sky represent the Milky Way.
Look east to see Orion now in the evening sky. Later this winter, Orion will be due south at nightfall.
October has brought clear skies and some fine celestial sights. Here’s a potpourri of what was up from home.ย
We’ve enjoyed some lovely early autumn weather here in southern Alberta, providing great opportunities to see and shoot a series of astronomical events.
Conjunctions
Venus and Mars in close conjunction in the dawn sky on October 5, 2017. Venus is the brightest object; Mars is below it; while the star above Venus is 4th magnitude Sigma Leonis. The foreground is illuminated by light from the setting Full Moon in the west. This is a single 1-second exposure with the 135mm lens at f/2 and Canon 60Da at ISO 800.ย
On October 5, Venus and Mars appeared a fraction of a degree apart in the dawn twilight. Venus is the brightest object, just above dimmer but red Mars. This was one of the closest planet conjunctions of 2017. Mars will appear much brighter in July and August 2018 when it makes its closest approach to Earth since 2003.
Satellites: The Space Station
An overhead pass of the ISS on October 5, 2017, with the Full Moon rising in the east at left. The ISS is moving from west (at right) to east (at left), passing nearly overhead at the zenith at centre. North is at the top, south at bottom in this fish-eye lens image with an 8mm Sigma fish-eye lens on the Canon 6D MkII camera. This is a stack of 56 exposures, each 4 seconds long at an interval of 1 second.ย
The Space Station made a series of ideal evening passes in early October, flying right overhead from my site at latitude 51ยฐ N. I captured it in a series of stacked still images, so it appears as a dashed line across the sky. In reality it looks like a very bright star, outshining any other natural star. Here, it appears to fly toward the rising Moon.
Satellites: Iridiums
A pair of nearly simultaneous and parallel Iridium satellite flares, on October 9, 2017, as they descended into the north. The left or westerly flare was much brighter and with a sharp rise and fall in brightness. While it was predicted to be mag. -4.4 I think it got much brighter, perhaps mag -7, but very briefly. These are Iridium 90 (left) and Iridium 50 (right). This is a stack of 40+ exposures each, 2 seconds at 1-second intervals, with the Sigma 24mm lens at f/1.4 and Nikon D750 at ISO 6400.
Often appearing brighter than even the ISS, Iridium satellite flares can blaze brighter than even Venus at its best. One did so here, above, in another time-lapse of a pair of Iridium satellites that traveled in parallel and flared at almost the same time. But the orientation of the reflective antennas that create these flares must have been better on the left Iridium as it really shot up in brilliance for a few seconds.
Auroras
A circumpolar star trail composite with Northern Lights, on October 13, 2017, shot from home in southern Alberta. The Big Dipper is at bottom centre; Polaris is at top centre at the axis of the rotation. The bottom edge of the curtains are rimmed with a pink fringe from nitrogen. This is a stack of 200 frames taken mostly when the aurora was a quiescent arc across the north before the substorm hit. An additional single exposure is layered in taken about 1 minute after the main star trail set to add the final end point stars after a gap in the trails. Stacking was with the Advanced Stacker Plus actions using the Ultrastreaks mode to add the direction of motion from the tapering trails. Each frame is 3 seconds at f/2 and ISO 6400 wth the Sigma 14mm lens and Nikon D750.
Little in the sky beats a fine aurora display and we’ve had several of late, despite the Sun being spotless and nearing a low ebb in its activity. The above shot is a composite stack of 200 images, showing the stars circling the celestial pole above the main auroral arc, and taken on Friday the 13th.
A decent aurora across the north from home in southern Alberta, on Friday the 13th, October, 2017, though these frames were taken after midnight MDT. 3 seconds at f/2 and ISO 6400 wth the Sigma 14mm lens and Nikon D750.
This frame, from some 1300 I shot this night, October 13, captures the main auroral arc and a diffuse patch of green above that pulsed on and off.
You can see the time-lapse here in my short music video on Vimeo.
Friday the 13th Aurora from Alan Dyer on Vimeo.
It’s in 4K if your monitor and computer are capable. It nicely shows the development of the aurora this night, from a quiescent arc, through a brief sub-storm outburst, then into pulsing and flickering patches. Enjoy!
What all these scenes have in common is that they were all shot from home, in my backyard. It is wonderful to live in a rural area and to be able to step outside and see these sites easily by just looking up!
โ Alan, October 16, 2017 / ยฉ 2017 Alan Dyer / AmazingSky.comย
I put two new fast 14mm lenses to the test: the Sigma 14mm f/1.8 Art vs. the Rokinon 14mm f/2.4 SP.ย
Much to the delight of nightscape and astrophotographers everywhere we have a great selection of new and fast wide-angle lenses to pick from.
Introduced in 2017 are two fast ultra-wide 14mm lenses, from Sigma and from Rokinon/Samyang. Both are rectilinear, not fish-eye, lenses.
I tested the Nikon version of the Sigma 14mm f/1.8 Art lens vs. the Canon version of the Rokinon 14mm f/2.4 SP. I used a Nikon D750 and Canon 6D MkII camera.
I also tested the new faster Rokinon SP against the older and still available Rokinon 14mm f/2.8, long a popular lens among nightscape photographers.
The Sigma 14mm is a fully automatic lens with auto focus. It is the latest in their highly regarded Art series of premium lenses. I have their 20mm and 24mm Art lenses and love them.
The Rokinon 14mm SP (also sold under the Samyang brand) is a manual focus lens, but with an AE chip so that it communicates with the camera. Adjusting the aperture is done on the camera, not by turning a manual aperture ring, as is the case with many of Rokinonโs lower cost series of manual lenses. The lens aperture is then recorded in each imageโs EXIF metadata, an aid to later processing. It is part of Rokinonโs premium โSpecial Performanceโ SP series which includes an 85mm f/1.2 lens.
All units I tested were items purchased from stock, and were not supplied by manufacturers as samples for testing. I own these!
CONCLUSIONS
For those with no time to read the full review, here are the key points:
โขย The Sigma f/1.8 Art exhibits slightly more off-axis aberrations than the Rokinon 14mm SP, even at the same aperture. But aberrations are very well controlled.
โขย As its key selling point, the Sigma offers another full stop of aperture over the Rokinon SP (f/1.8 vs. f/2.4), making many types of images much more feasible, such as high-cadence aurora time-lapses and fixed-camera stills and time-lapses of a deeper, richer Milky Way.
โขย The Sigma also has lower levels of vignetting (darkening of the frame corners) than the Rokinon 14mm SP, even at the same apertures.
โขย Both the Sigma Art and Rokinon SP lenses showed very sharp star images at the centre of the frame.
โขย Comparing the new premium Rokinon 14mm SP against the older Rokinon 14mm f/2.8 revealed that the new SP model has reduced off-axis aberrations and lower levels of vignetting than the lower-cost f/2.8 model. However, so it should for double the price or more of the original f/2.8 lens.
โขย The Rokinon 14mm SP is a great choice for deep-sky imaging where optical quality is paramount. The Sigma 14mm Art’s extra speed will be superb for time-lapse imaging where the f/1.8 aperture provides more freedom to use shorter shutter speeds or lower ISO settings.
โขThough exhibiting the lowest image quality of the three lenses, the original Rokinon 14mm f/2.8 remains a superb value, at its typical price of $350 to $500. For nightscapers on a budget, itโs an excellent choice.
TESTING PROCEDURES
For all these tests I placed the camera and lens on a tracking mount, the Sky-Watcher Star Adventurer Mini shown below. This allowed the camera to follow the sky, preventing any star trailing. Any distortions you see are due to the lens, not sky motion.
Star Adventurer Mini Tracker (with Sigma 14mm on Nikon D750)
As I stopped down the aperture, I lengthened the exposure time to compensate, so all images were equally well exposed.
In developing the Raw files in Adobe Camera Raw, I applied a standard level of Contrast (25) and Clarity (50) boost, and a modest colour correction to neutralize the background sky colour. I also applied a standard level of noise reduction and sharpening.
However, I did not apply any lens corrections that, if applied, would reduce lateral chromatic aberrations and compensate for lens vignetting.
So what you see here is what the lens produced out of the camera, with no corrections. Keep in mind that the vignetting you see can be largely compensated for in Raw development, with the provisos noted below. But I wanted to show how much vignetting each lens exhibited.
OFF-AXIS ABERRATIONS
Stars are the severest test of any lens. Not test charts, not day shots of city skylines. Stars.
The first concern with any fast lens is how sharp the stars are not only in the centre of the frame, but also across the frame to the corners. Every lens design requires manufacturers to make compromises on what lens aberrations they are going to suppress at the expense of other lens characteristics. You can never have it all!
However, for astrophotography we do look for stars to be as pinpoint as possible to the corners, with little coma and astigmatism splaying stars into seagull and comet shapes. Stars should also not become rainbow-coloured blobs from lateral chromatic aberration.
SIGMA 14mm ART
Sigma 14mm Art โ Upper Left Corner Close-up at 5 Apertures
Sigma 14mm Art โ Upper Right Corner Close-up at 5 Apertures
These images show 200% blowups of the two upper corners of the Sigma 14mm Art lens, each at five apertures, from wide open at f/1.8, then stopped down at 1/3rd stop increments to f/2.8. As you would expect, performance improves as you stop down the lens, though some astigmatism and coma are still present at f/2.8.
But even wide open at f/1.8, off-axis aberrations are very well controlled and minimal. You have to zoom up this much to see them.
There was no detectable lateral chromatic aberration.
Aberrations were also equal at each corner, showing good lens centering and tight assembly tolerances.
ROKINON 14mm SP
Rokinon 14mm SP at 3 Apertures
Rokinon 14mm SP at 3 Apertures
Similarly, these images show 200% blow-ups of the upper corners of the Rokinon SP, at its three widest apertures: f/2.4, f/2.8 and f/3.2.
Star images look tighter and less aberrated in the Rokinon, even when compared at the same apertures.
But images look better on the left side of the frame than on the right, indicating a slight lens de-centering or variation in lens position or figuring, a flaw noted by other users in testing Rokinon lenses. The difference is not great and takes pixel-peeping to see. Nevertheless, it is there, and may vary from unit to unit. This should not be the case with any โpremiumโ lens.
SIGMA vs. ROKINON
Rokinon vs. Sigma Corner Aberrations Compared
This image shows both lenses in one frame, at the same apertures, for a more direct comparison. The Rokinon SP is better, but of course, doesnโt go to f/1.8 as does the Sigma.
ON-AXIS ABERRATIONS
We donโt want good performance at the corners if it means sacrificing sharp images at the centre of the frame, where other aberrations such as spherical aberration can take their toll and blur images.
These images compare the two lenses in 200% blow-ups of an area in the Cygnus Milky Way that includes the Coathanger star cluster. Both lenses look equally as sharp.
SIGMA 14mm ART
Sigma 14mm Art โ Centre of Frame Close-up
Even when wide open at f/1.8 the Sigma Art shows very sharp star images, with little improvement when stopped down. Excellent!
ROKINON 14mm SP
Rokinon 14mm SP โ Centre of Frame Close-up
The same can be said for the Rokinon SP. It performs very well when wide open at f/2.4, with star images as sharp as when stopped down 2/3rds of an f-stop to f/3.2
SIGMA vs. ROKINON
Sigma vs. Rokinon Centre Sharpness Compared
This image shows both lenses in one frame, but with the Sigma wide open at f/1.8 and stopped down to f/2.8, vs. the Rokinon wide open at f/2.4 and stopped to f/2.8. All look superb.
VIGNETTING
The bane of wide-angle lenses is the light fall-off that is inevitable as lens focal lengths decrease. Weโd like this vignetting to be minimal. While it can be corrected for later when developing the Raw files, doing so can raise the visibility of noise and discolouration, such as magenta casts. The less vignetting we have to deal with the better.
As with off-axis aberrations, vignetting decreases as lenses are stopped down. Images become more uniformly illuminated across the frame, with less of a โhot spotโ in the centre.
SIGMA 14mm ART
Sigma 14mm Art โ Vignetting Compared at 5 Apertures
This set compares the left edge of the frame in the Sigma SP at five apertures, from f/1.8 to f/2.8. You can see how the image gets brighter and more uniform as the lens is stopped down. (The inset image at upper right show what part of the frame I am zooming into.)
ROKINON 14mm SP
Rokinon 14mm SP โ Vignetting Compared at 3 Apertures
This similar set compares the frameโs left edge in the Rokinon SP at its three widest apertures, from f/2.4 to f/3.2. Again, vignetting improves but is still present at f/3.2.
SIGMA vs. ROKINON
Rokinon vs. Sigma โ Vignetting Compared
This compares both lenses at similar apertures side by side for a direct comparison. The Sigma is better than the Rokinon with a much more uniform illumination across the frame.
Sigma 14mm Art โ Vignetting at f/1.8 Maximum Aperture
Rokinon 14mm SP โ Vignetting at f/2.4 Maximum Aperture
In these two images, above, of the entire frame at their respectively widest apertures, Iโd say the Sigma exhibits less vignetting than the Rokinon, even when wide open at f/1.8. The cost for this performance, other than in dollars, is that the Sigma is a large, heavy lens with a massive front lens element.
ROKINON 14mm f/2.4 SP vs. ROKINON 14mm f/2.8 Standard
Even the Rokinon 14mm SP, though a manual lens, carries a premium price, at $800 to $1000 U.S., depending on the lens mount.
The 14mm Rokinon/Samyang f/2.8 Lens
For those looking for a low-cost, ultra-wide lens, the original Rokinon/Samyang 14mm f/2.8 (shown above) is still available and popular. It is a fully manual lens, though versions are available with a AE chip to communicate lens aperture information to the camera.
I happily used this f/2.8 lens for several years. Before I sold it earlier in 2017 (before I acquired the Sigma 14mm), I tested it against Rokinon’s premium SP version.
The older f/2.8 lens exhibited worse off-axis and on-axis aberrations and vignetting than the SP, even with the SP lens set to the same f/2.8 aperture. But image quality of the original lens is still very good, and the price is attractive, at half the price or less, than the 14mm SP Rokinon.
TWO 14mm ROKINONS: OFF-AXIS ABERRATIONS
Two Rokinons (Older “Standard” vs. new SP) โ Upper Left Corner Close-up
Two Rokinons (Older “Standard” vs. new SP) โ Upper Right Corner Close-up
Here, in closeups of the upper corners, I show the difference between the two Rokinons, the older standard lens on the left, and the new SP on the right.
The SP, as it should, shows lower aberrations and tighter star images, though with the improvement most marked on the left corner; not so much on the right corner. The original f/2.8 lens holds its own quite well.
TWO 14mm ROKINONS: ON-AXIS ABERRATIONS
Two Rokinons (Older “Standard” vs. new SP) โ Centre of Frame Close-up
At the centre of the frame, the difference is more apparent, with the SP lens exhibiting sharper star images than the old 14mm with its generally softer, larger star images. The latter likely has more spherical aberration.
TWO 14mm ROKINONS: VIGNETTING
Two Rokinons (Older “Standard” vs. new SP) โ Vignetting Compared
The new SP lens clearly has the advantage here, with less vignetting and brighter corners even when wide open at f/2.4 than the older lens does at its widest aperture of f/2.8. This is another reason to go for the new SP if image quality is paramount
PRICES
The new Sigma 14mm Art lens is costly, at $1600 U.S., though with a price commensurate with its focal length and aperture. Other premium lenses in this focal length range, either prime or zoom, from Nikon and Canon sell for much more, and have only an f/2.8 maximum aperture. So in that sense, the Sigma Art is a bargain.
The new Rokinon 14mm SP sells for $800 to $1000, still a premium price for a manual focus lens. But its optical quality competes with the best.
The older Rokinon 14mm f/2.8 is a fantastic value at $350 to $500, depending on lens mount and AE chip. For anyone getting into nightscape and Milky Way photography, it is a great choice.
RECOMMENDATIONS
With such a huge range in price, what should you buy?
A 14mm is a superb lens for nightscape shooting โ for sky-filling auroras, for panoramas along the Milky Way, or of the entire sky. But the lens needs to be fast. All three lenses on offer here satisfy that requirement.
Sigma 14mm Art (left) and Rokinon 14mm SP (right)
SIGMA 14mm f/1.8 ART
If you want sheer speed, this is the lens. It offers a full stop gain over the already fast Rokinon f/2.5, allowing exposures to be half the length, or shooting at half the ISO speed for less noise.
Its fast speed comes into its own for rapid cadence aurora time-lapses, to freeze auroral motion as much as possible in exposures as short as 1 to 2 seconds at a high ISO. The fast speed might also make real-time movies of the aurora possible on cameras sensitive and noiseless enough to allow video shooting at ISO 25,000 and higher, such as the Sony a7s models.
The Sigmaโs fast speed also allows grabbing rich images of the Milky Way in exposures short enough to avoid star trailing, either in still images or in time-lapses of the Milky Way in motion.
While the Sigma does exhibit some edge aberrations, they are very well controlled (much less than I see with some 24mm and 35mm lenses I have) and are a reasonable tradeoff for the speed and low level of vignetting, which results in less noisy corners.
Photographers obsess over corner aberrations when, for fixed-camera nightscape shooting, a low level of vignetting is probably more critical. Correcting excessive vignetting introduces noise, while the corner aberrations may well be masked by star trailing. Only in tracked images do corner aberrations become more visible, as in the test images here.
Iโd suggest the Sigma is the best choice for nightscape and time-lapse shooting, with its speed allowing for kinds of shots not possible otherwise.
The Sigma also appears to be the best coated of all the lenses, as you can see in the reflections in the lenses in the opening image, and below. However, I did not test the lenses for flares and ghosting.
As a footnote, none of the lenses allow front-mounted filters, and none have filter drawers.
ROKINON 14mm f/2.4 SP
For less money you get excellent optical quality, though with perhaps some worrisome variation in how well the lens elements are figured or assembled, as evidenced by the inconsistent level of aberration from corner to corner.
Nevertheless, stars are tight on- and off-axis, and vignetting is quite low, for corners that will be less noisy when the shadows are recovered in processing.
Iโd suggest the Rokinon SP is a great choice if tracked deep-sky images are your prime interest, where off-axis performance is most visible. However, the SPโs inconsistent aberrations from corner to corner are evidence of lower manufacturing tolerances than Sigmaโs, so your unit may not perform like mine.
For nightscape work, the SPโs f/2.4 aperture might seem a minor gain over Rokinonโs lower-cost f/2.8 lens. But it is 1/3 of an f-stop. That means, for example, untracked Milky Way exposures could be 30 seconds instead of 40 seconds, short enough to avoid obvious star trailing. At night, every fraction of an f-stop gain is welcome and significant.
ROKINON 14mm f/2.8 Standard
You might never see the difference in quality between this lens and its premium SP brother in images intended for time-lapse movies, even at 4K resolution.
But those intending to do long-exposure deep-sky imaging, as these test images are, will want the sharpest stars possible across the frame. In which case, consider the 14mm SP.
But if price is a prime consideration, the original f/2.8 Rokinon is a fine choice. Youโll need to apply a fair amount of lens correction in processing, but the lens exists in the Camera Raw/Lightroom database, so correction is just a click away.
That was a lengthy report, I know! But thereโs no point in providing recommendations without the evidence to back them up.
All images, other than the opening โbeauty shot,โ can be clicked/tapped on to download a full-resolution original JPG for closer inspection.
As Iโve just received the Sigma Art lens Iโve not had a chance to shoot any โrealโ nightscape images with it yet, just these test shots. But for a real life deep-sky image of the Milky Way shot with the Rokinon SP, see this image from Australia. https://flic.kr/p/SSQm7G
I hope you found the test of value in helping you choose a lens.
Clear skies!
โ Alan, September 22, 2017 /ย ยฉ 2017 Alan Dyer / amazingsky.com
“No ocean of water in the world can vie with its gorgeous sunsets; no solitude can equal the loneliness of a night-shadowed prairie.” โ William Butler, 1873
In the 1870s, just before the coming of the railway and European settlement, English adventurer William Butler trekked the Canadian prairies, knowing what he called “The Great Lone Land” was soon to disappear as a remote and unsettled territory.
The quote from his book is on a plaque at the site where I took the lead image, Sunset Point at Writing-on-Stone Provincial Park.
The night was near perfect, with the Milky Way standing out down to the southern horizon and the Sweetgrass Hills of Montana. Below, the Milk River winds through the sandstone rock formations sacred to the Blackfoot First Nations.
The next night (last night, July 26, as I write this) I was at another unique site in southern Alberta, Red Rock Coulee Natural Area. The sky presented one of Butler’s unmatched prairie sunsets.
This is “big sky” country, and this week is putting on a great show with a succession of clear and mild nights under a heat wave.
The waxing crescent Moon adds to the western sky and the sunsets. But it sets early enough to leave the sky dark for the Milky Way to shine to the south.
This was the Milky Way on Wednesday night, July 27, over Red Rock Coulee. Sagittarius and the centre of the Galaxy lie above the horizon. At right, Saturn shines amid the dark lanes of the Dark Horse in the Milky Way.
I’m just halfway through my week-long photo tour of several favourite sites in this Great Lone Land. Next, is Cypress Hills and the Reesor Ranch.
โ Alan, July 27, 2017 / ยฉ 2017 Alan Dyer / amazingsky.com
In a winter of cloud, the skies cleared for a magical night in the Alberta Badlands.
Two weeks ago, on February 28, I took advantage of a rare and pristine night to head to one of my favourite spots in Dinosaur Provincial Park, to shoot nightscapes of the winter sky over the Badlands.
A spate of warm weather had melted most of the snow, so the landscape doesn’t look too wintery. But the stars definitely belong to winter in the Northern Hemisphere.
The main image above shows the winter Milky Way arching across the sky from southeast (at left) to northwest (at right). The tower of light in the west is the Zodiacal Light, caused by sunlight reflecting off dust particles in the inner solar system. It is an interplanetary, not atmospheric, effect.
This is a stitch of 6 segments with the 12mm Rokinon lens at f/2.8 for 30 seconds each, with the Nikon D750 at ISO 6400, mounted portrait. Stitched with PTGui.
Above, this 360ยฐ version of the scene records the entire sky, with the winter Milky Way from horizon to horizon. With a little averted imagination you can also trace the Zodiacal Light from west (right) over to the eastern sky (left), where it brightens in the diffuse glow of the Gegenschein, where dust opposite the Sun in the outer solar system reflects light back to us.
This is a stitch of 6 segments taken with the 12mm full-fame fish-eye Rokinon lens at f/2.8, all 30-second exposures with the Nikon D750 at ISO 6400. The camera was aimed portrait with the segments at 60ยฐ spacings. Stitched with PTGui using equirectangular projection with the zeith pulled down slightly.
A rectangular version of the panorama wraps the sky around from east (left), with Leo rising, to northeast (right), with the Big Dipper standing on its handle. I’ve added the labels in Photoshop of course.
This is a stack of 8 x 30-second exposures for the ground, mean combined to smooth noise, plus one 30-second exposure for the sky. All at f/2.2 with the Sigma 20mm Art lens and Nikon D750 at ISO 6400.
Here, in a single-frame shot, Orion is at centre, Canis Major (with Sirius) is below left, and Taurus (with Aldebaran) is at upper right. The Milky Way runs down to the south. The clusters M35, M41, M46 and M47 are visible as diffuse spots,ย as isย the Orion Nebula, M42, below Orion’s Belt.
The late winter evening Zodiacal Light, from at Dinosaur Provincial Park, Alberta, February 28, 2017. This is a stack of 7 x 30-second exposures for the ground, mean combined for lower noise, plus one 30-second exposure for the sky, all at f/2 with the 20mm Sigma Art lens, and Nikon D750 at ISO 6400.
This is certainly my best shot of the evening Zodiacal Light from my area in Alberta. It is obvious at this time of year on moonless nights, but requires a site with little urban skyglow to the west.
It is best visible in the evening from northern latitudes in late winter and spring.
Here, Venus is just setting above the badlands landscape. The Andromeda Galaxy is at right, the Pleiades at left. The Milky Way runs across the frame at top.
There is a common belief among nightscape photographers that the Milky Way can be seen only in summer. Not so.
What they mean is that the brightest part of the Milky Way, the galactic centre, is best seen in summer. But the Milky Way can be seen in all seasons, with the exception of spring when it is largely absent from the early evening sky, but rises late at night.
After a year of work, the new edition of my Nightscapes and Time-Lapse ebook is on the e-shelves at the Apple iBooks Store.ย
In the two years since I first published this ebook, the field of nightscape shooting has enjoyed many changes, to equipment, software and techniques. Not to mention I’ve learned a lot!
All those changes are reflected in this new and expanded edition. It is 100 pages bigger โ 500 pages now โ than the first edition. It contains:
โข 60 step-by-step image processing tutorials, all with current late-2016 software
โข a dozen galleries of comparison “before-and-after” images
โข 40 HD videos of time-lapse examples
โข reviews of current equipment
โข reviews of software, some very new – like this week! โ to use in place of Adobe
โข information on Nikon and Pentax cameras, as well as Canons
โข In addition, many images can be tapped on to zoom up. And most text can now be enlarged in a Scrolling View for use on small-screen devices.
The previous 2014 edition garnered rave reviews, with readers calling it:
โIncredibly well put together and visually stunning.โ
โSimply amazing! From hardware to software, it’s all covered. Alan Dyer got it right!โ
and โIt is a must-have resource for anyone doing nightscape and time-lapse photography.โ
As with the first edition, I’ve designed theย ebook to appeal to both amateur astronomers and landscape photographers by providing what I feel is theย most comprehensive information available in any ebook on theย hugely popular field of nightscape and time-lapse photography.
This isn’t a simple 50-page PDF pamphlet, as so many ebooks are. This is an extensive and detailed tutorial, with loads of interactive and multi-media content.
There’s loads of information on cameras and lenses
I’ve included information on setting Nikons and Pentaxes. Sony mirrorless camera will wait for the next edition!
I’ve added many new images, with lots of information on how to set cameras for many sky subjects.
The ever popular Milky Way gets its own chapter, with information on how to โ and how NOT to โ process the Milky Way.
I’ve included lots of information about new time-lapse gear, including some units, like the TimeLapse+ View bramping intervalometer that aren’t even available for general sale yet.
Lots of embedded HD videos illustrate time-lapse techniques. A book about shooting time-lapse movies ought to have time-lapse movies in it. Most don’t!
Step-by-step tutorials show you how to process with Lightroom, Camera Raw, Photoshop, and LRTimelapse (shown here), an essential tool for time-lapse work.
Tutorials cover still image processing, from the basics to advanced techniques such as masking and compositing. Stacking meteor showers and star trails? It’s all covered!
The size and media content of the ebook make it impossible to publish on Kindle/Amazon or Google Play/Android.
How to Photograph & Process Nightscapes and Time-Lapses is available worldwide exclusively through the Apple iBooks Store, for the iBooks app on Apple Macs, iPads and iPhones.
Owners of the original edition get the update for FREE! Just open iBooks on your Mac or iOS device and check Purchased and Updates.
For new buyers, the price remains unchanged: $24.99 US (prices vary with country due to exchange rates and local GST). The book is sold in every one of the 51 countries Apple sells into.
Enjoy! And do leave a review or star rating for the new edition at iTunes/iBooks Store.
My free Amazing Sky Calendar for 2017 is now available for download! Plan your astronomical year!
Once again, I have prepared a free 12-month Calendar listing loads of celestial events, Moon phases, highlighted space events, and with small charts to show what’s happening in the sky for the coming year. Plus a set of my favourite images from 2016.
I’m pleased to announce that after a year in production, our video tutorial series, Nightscapes and Time-Lapses: From Field to Photoshop, is now available.ย
It’s been quite a project! Over the last few years I’ve presented annual astrophoto workshops in conjunction with our local telescope dealer All-Star Telescope to great success.
However, we always had requests for the workshops on video. Attempts to video the actual workshops never produced satisfactory results. So we spent a year shooting in the field and in the studio to produce a “purpose-built” series of programs.
They are available now as a set of three programs, totalling 4 hours of instruction, for purchase and download at Vimeo at
For those wanting “hard copies” we will also be selling the programs on mailed USB sticks. See All-Star Telescope for info and prices. The downloaded version can also be ordered from there.
This series deals with the basics of capturing, then processing nightscape still images and time-lapse movies of the night sky and landscapes lit by moonlight and starlight.
Here’s the content outline:
Program 1 โ Choosing Equipment (1 Hour)
โข Tips for Getting Started โข Essential Gear โขย Choosing A Camera โขย Photo 101 โ Exposure Triangle โขย Setting Exposure โขย Expose to the Right โขย Setting a Camera โ File Types โขย Photo 101 โ Noise Sources โขย Setting a Camera โ Noise Reduction โขย Setting a Camera โ Focusing โขย Setting a Camera โ Other Menus โขย Choosing Lenses โขย Choosing an IntervalometerSummary and Tips
Program 2 โ Shooting in the Field (1 hour)
โขย Climbing the Learning Curve โขย Twilights โขย Astronomy 101 โ Conjunctions โขย Shooting Conjunctions โขย Moonrises โขย Shooting Auroras โขย Astronomy 101 โ Auroras โขย Photo 101 โ Composing โขย Moonlit Nightscapes โขย Astronomy 101 โ Where is the Moon? โขย Choosing a Location โขย Shooting the Milky Way โขย Astronomy 101 โ Where is the Milky Way? โขย Astronomy 101 โ Daily Sky Motion โขย Tracking the Sky โขย Shooting Star Trails โขย Shooting Time-Lapses โขย Calculating Time-Lapses โขย A Pre-Flight Checklist โขย Summary and Tips
Program 3 โ Processing Nightscapes and Time-Lapses (2 hours)
โขย Workflows โขย Using Adobe Bridge โ Importing and Selecting โขย Photo 101 โ File Formats โขย Using Adobe Lightroom โ Importing and Selecting โขย Adobe Camera Raw โ Essential Settings โขย Adobe Camera Raw โ Developing Raw Images โขย Adobe Lightroom โ Develop Module โขย Adobe Photoshop โ Introduction โขย Photoshop โ Setup โขย Photoshop โ Smart Filters โขย Photoshop โ Adjustment Layers โขย Photoshop โ Masking โขย Photoshop โ Processing Star Trails & Time-Lapses โขย Stacking Star Trails โขย Assembling Time-Lapse Movies โขย Archiving โขย Summary & Finale
If this first introductory series is successful we may produce follow-up programs on more advanced techniques.
Thanks for looking!
โ Alan, October 18, 2016 / ยฉ 2016 Alan Dyer / amazingsky.com
With the harvest in full swing, the aurora and Moon lit the fields on a clear September evening.
This night, September 19, showed prospects for a good display of Northern Lights, and sure enough as it got dark a bright, well-defined arc of Lights danced to the north.
I headed off to some photogenic spots near home, on the prairies of southern Alberta. By the time I got in place, the aurora had already faded.
However, the arc still photographed well and provided a great backdrop to these rural scenes. The rising Moon, then 3 days past full, lit the foreground. In the lead image, lights from combines and trucks working the field behind the bins are at left.
A diffuse arc of aurora and the rising waning gibbous Moon light the sky over the old barn near home at harvest time, September 19, 2016. The glows from Strathmore and Calgary light the clouds to the west at far left. The Big Dipper shines over the barn, with Capella and the stars of Perseus at right. The Pleiades are rising to the left of the Moon. This is a panorama of 5 segments, with the 20mm lens and Nikon D750. Stitched with ACR.
The image above was from later in the night, just down the road at a favourite and photogenic grand old barn.
The Big Dipper and a diffuse aurora over the old barn near home, in southern Alberta, on September 16, 2016. The waning gibbous Moon off camera at right provides the illumination. This is a stack of 4 exposures, averaged, for the ground to smooth noise and one exposure for the sky to keep the stars untrailed. All 13 seconds at f/2.8 with the Sigma 20mm lens, and ISO 1600 with the Nikon D750. Diffraction spikes on stars added with Noel Carboniโs Astronomy Tools actions.
Note the Big Dipper above the barn. A waning and rising Moon like this is great for providing warm illumination.
The time around equinox is usually good for auroras, as the interplanetary and terrestrial magnetic fields line up better to let in the electrons from the Sun. So perhaps we’ll see more Lights, with the Moon now gradually departing the evening sky.
What a night this was – perfect skies overย an iconic location in the Rockies. And an aurora to top it off!
On August 31 I took advantage of a rare clear night in the forecast and headed to Banff and Moraine Lake for a night of shooting. The goal was to shoot a time-lapse and stills of the Milky Way over the lake.
The handy planning app, The Photographer’s Ephemeris, showed me (as below) that the Milky Way and galactic centre (the large circles) would be ideally placed over the end of the lake as astronomical twilight ended at 10:30 p.m. I began the shoot at 10 p.m. as the sky still had some twilight blue in it.
I planned to shoot 600 frames for a time-lapse. From those I would extract select frames to create a still image. The result is below.
This is looking southwest with the images taken about 11:15 pm on August 31, 2016.The ground is illuminated by a mix of starlight, lights from the Moraine Lake Lodge, and from a display of aurora brightening behind the camera to the north.ย The starclouds of Scutum and Sagittarius are just above the peaks of the Valley of Ten Peaks. This is a stack of 16 images for the ground, mean combined to smooth noise, and one exposure for the sky, untracked, all 15 seconds at f/2 with the Sigma 20mm Art lens and Nikon D750 at ISO 6400. The frames are part of a 450-frame time-lapse.
As the caption explains, the still is a composite of one exposure for the sky and 16 in succession for the ground, averaged together in a technique to smooth noise. The camera wasn’t tracking the sky, so stacking sky images isn’t feasible, as much as I might like to have the lower noise there, too. (There are programs that attempt to align and stack the moving sky but I’ve never found they work well.)
About midnight, the Valley ofย Ten Peaks around the lake began to light up. An aurora was getting active in the opposite direction, to the north. With 450 frames shot, I stopped the Milky Way time-lapse and turned the camera the other way. (I was lazy and hadn’tย hefted a second camera and tripod up the steep hill to the viewpoint.)
The lead-image panorama is the first result, showing the sweeping arc of Northern Lights over Desolation Valley.
The Northern Lights in a fine Level 4 to 5 display over Desolation Valley at Moraine Lake, Banff National Park, on the night of August 31/Sept 1. This is one frame from a 450-frame time-lapse with the aurora at its best. This is a 2-second exposure at f/2 with the Sigma 20mm Art lens and Nikon D750 at ISO 5000.
Still images shot, I began a time-lapse of the Lights, grabbing another 450 frames, this time using just 2-second exposures at f/1.6 for a rapid cadence time-lapse to help freeze the motion of the curtains.
The final movies and stills are in a music video here:
I ended the night with a parting shot of the Pleiades and the winter stars rising behind the Tower of Babel formation. I last photographedย that scene with those same stars in the 1980s using 6×7 film.
The early winter stars rising behind the Tower of Babel formation at Moraine Lake, Banff National Park, with a bright aurora to the north at left. Visible are the Pleiades at centre, and Capella and the stars of Auriga at left. Just above the mountain are the Hyades and Taurus rising. At top are the stars of Perseus. Aries is just above the peak of Babel. The aurora in part lights the landscape green. This is a stack of 16 images for the ground, mean combined to smooth noise, and 1 image for the sky, untracked, all for 15 seconds at f/2.2 with the Sigma 20mm Art lens, and Nikon D750 at ISO 3200. All with LENR turned on.
In a summer of clouds and storms, this was a night to make up for it.
Saturn, Mars and the Milky Way appeared in the twilight over the Bow River.
I shot this scene on August 24 from the viewpoint at Blackfoot Crossing Historical Park, overlooking the Bow River. Mars appears between Saturn above and Antares below, in a line of objects west of the Milky Way.
The valley below is the traditional meeting place of the Blackfoot Nation, and the site of the signing of Treaty Seven between Chief Crowfoot and Colonel MacLeod of the North West Mounted Police in 1877.
The image is a panorama of two images, each 20-second exposures at f/2 and ISO 1600 with the 24mm lens. I shot them just prior to shooting time-lapses of the moving sky, using two cameras to create a comparison pair of videos, to illustrate the choices in setting the cadence when shooting time-lapses.
The movies, embedded here, will be in the next edition of my Nightscapes and Time-Lapse ebook, with the current version linked to below. The text explains what the videos are showing.
Choose Your Style
When shooting frames destined for a time-lapse movie we have a choice:
Shoot fewer but longer exposures at slower ISOs and/or smaller apertures.
OR …
Shoot lots of short exposures at high ISOs and/or wide apertures.
The former yields greater depth of field; the latter produces more noise. But with time-lapses, the variations also affect the mood of a movie in playback.
This comparison shows a pair of movies, both rendered at 30 frames per second:
Clip #1 was taken over 2 hours using 20-second exposures, all at ISO 2000 and f/2 with 1-second intervals. The result was 300 frames.
Clip #2 was taken over 1 hour using 5-second exposures also at f/2 and 1-second intervals, but at ISO 8000. The result was 600 frames: twice as many frames in half the time.
Clip #2 exhibits enough noise that I couldnโt bring out the dark foreground as well as in Clip #1. Clip 2 exhibits a slower, more graceful motion. And it better โtime-resolvesโ fast-moving content such as cars and aircraft.
Which is better? It depends …
Long = Fast
The movie taken at a longer, slower cadence (using longer exposures) and requiring 2 hours to capture 300 frames resulted in fast, dramatic sky motion when played back. Two hours of sky motion are being compressed into 10 seconds of playback at 30 frames per second. You might like that if you want a dramatic, high-energy feel.
Short = Slow
By comparison, the movie that packed 600 frames into just an hour of shooting (by using short exposures taken at fast apertures or fast ISOs) produced a movie where the sky moves very slowly during its 10 seconds of playback, also at 30 frames per second. You might like that if you want a slow, peaceful mood to your movies.
So, if you want your movie to have a slow, quiet feel, shoot lots of short exposures. But, if you want your movie to have a fast, high-energy feel, shoot long exposures.
As an aside โ all purchasers of the current edition of my ebook will get the updated version free of charge via the iBooks Store once it is published later this year.ย
โ Alan, August 26, 2016 / ยฉ 2016 Alan Dyer / AmazingSky.com
It was a great night for shooting meteors as the annual Perseids put on a show.
For the Perseid meteor shower I went to one of the darkest sites in Canada, Grasslands National Park in southern Saskatchewan, a dark sky preserve and home to several rare species requiring dark nights to flourish โ similar to astronomers!
This year a boost in activity was predicted and the predictions seemed to hold true. The lead image records 33 meteors in a series of stacked 30-second exposures taken over an hour.
It shows only one area of sky, looking east toward the radiant point in the constellation Perseus โ thus the name of the shower.
Extrapolating the count to the whole sky, I think it’s safe to sayย there would have beenย 100 or more meteors an hour zipping about, not bad for my latitude of 49ยฐ North.
A lone Perseid meteor streaking down below the radiant point in Perseus, with the sky and landscape lit by the waxing gibbous Moon, August 11, 2016. Perseus is rising in the northeast, Andromeda is at right, with the Andromeda Galaxy right of centre. Cassiopeia is at top. Taken from the 70 Mile Butte trailhead in Grasslands National Park, Saskatchewan.
The early part of the evening was lit by moonlight, which lent itself to some nice nightscapes scenes but fewer meteors.
The 2016 Perseid meteor shower, in a view looking north to the Big Dipper and with the radiant point in Perseus at upper right, the point where the meteors appear to be streaking from. This is a stack of 10 frames, shot over one hour from 1:38 a.m. to 2:37 a.m. CST. The camera was on the Star Adventurer tracker so all the sky frames aligned. The ground is from a stack of four frames, mean combined to smooth noise, and taken with the tracker motor off to minimize ground blurring, and taken at the start of the sequence. All exposures 40 seconds at f/3.2 with the 16-35mm lens and Canon 6D at ISO 6400.
But once the Moon set and the sky darkened the show really began. Competing with the meteors was some dim aurora, but also the brightest display of airglow I have even seen.
It was bright enough to be visible to the eye as grey bands, unusual. Airglow is normally sub-visual.
But the camera revealed the airglow bands as green, red, and yellow, from fluorescing oxygen and sodium atoms. The bands slowly rippled across the sky from south to north.
Airglow is something you can see only from dark sites. It is one of the wonders of the night sky, that can make a dark sky not dark!
TECHNICAL:
The lead image is stack of 31 frames containing meteors (two frames had 2 meteors), shot from 1:13 am to 2:08 a.m. CST, so over 55 minutes. The camera was not tracking the sky but was on a fixed tripod. I choose one frame with the best visibility of the airglow as the base layer. For every other meteor layer, I used Free Transform to rotate each frame around a point far off frame at upper left, close to where the celestial pole would be and then nudged each frame to bring the stars into close alignment with the base layer, especially near the meteor being layered in.
This placed each meteor in its correct position in the sky in relation to the stars, essential for showing the effect of the radiant point accurately.
Each layer above the base sky layer is masked to show just the meteor and is blended with Lighten mode. If I had not manually aligned the sky for each frame, the meteors would have ended up positioned where they appeared in relation to the ground but the radiant point would have been smeared โ the meteors would have been in the wrong place.
Unfortunately, itโs what I see in a lot of composited meteor shower shots.
It would have been much easier if I hadย had this camera on a tracker so all frames would have been aligned coming out of the camera. But the other camera was on the tracker! It took the other composite image, the one looking north.
The ground is a mean combined stack of 4 frames to smooth noise in the ground. Each frame is 30 seconds at f/2 with the wonderful Sigma 20mm Art lens and Nikon D750 at ISO 5000. The waxing Moon had set by the time this sequence started, leaving the sky dark and the airglow much more visible.
I am pleased to present my latest music video featuring Alberta Skies in motion, set to the music of Ian Tyson.
Myย 5-minute video features time-lapse imagery shot over the last three years in the plains, badlands, and mountains of Alberta.
Do click through to Vimeo and view in HD for the best quality.
The footage is set to the music of Alberta singer/songwriter Ian Tyson, and his superb rendition of Home on the Range. It is used by kind permission of Ian Tyson and Stony Plain Records. Thanks!
It was hearing Ian’s version of this song on CBC one day in 1992 when hisย album And Stood There Amazed came out that inspired me to move back to Alberta and the great landscapes of the west that I knew I wanted to capture.
Little did I know at the time how it was going to be possible in the 2000s to do it in time-lapse.
We achieved our funding goal on Kickstarter with 10 days to go.
Hurray! We made it to the top, with funding now secure to complete the production of our video tutorial series.
But the Kickstartercampaign doesn’t end now! You have until July 15 to back us, and get the videos at a big discount off the final retail prices when they are released later this year. So there’s still time to act and save!
A bright display of noctilucent clouds last night prompts me to remind northerners to look north at this prime season for night shining clouds.
Noctilucent clouds (NLCs) can be seen only in summer and are best in the few weeks before and after (mostly after) summer solstice. I shot all these images in the middle of the night. Indeed, the two images above and just below areย from 3 am on the morning of June 27.
NLCsย are high altitude clouds at the edge of space some 80 kilometres above the Earth, far above any normal weather clouds. Their height allows sunlight streaming over the pole to illuminate them all night long.
Noctilucent clouds at 3 am on June 27 over a prairie pond in southern Alberta. The NLCs were visible as an arc across the north for at least 2 hours and were still there as dawn twilight brightened at 3:30 am. This is looking due north with the bowl of the Big Dipper at upper left. Capella is at lower right. Shot with the 24mm lens.
Their cause is a mystery. They may formย by water vapour condensing on meteoric dust particles.
They look luminescent, as if glowing on their own. But these are not auroras. They shine only by reflected sunlight.
And they have complex structures, with intricate waves and ripples.
A display of noctilucent clouds, the first good display of the season from my area of southern Alberta, on June 17/18. 2016. This is with a 105mm telephoto and the Nikon D750, and is the first frame of a 1000-frame time-lapse sequence. However, as the Sun dropped farther below the horizon the clouds did lose illumination and faded, from the top down.
And they move very slowly, as this time-lapse from June 17 shows.
Readers living at a latitude between 45ยฐ and 55ยฐ are best situated to see “NLCs.” From farther south the clouds will be below the horizon. From farther north the sky may be too bright with twilight and the angle of illumination wrong for optimum viewing.
Unlike auroras, there is no predicting when they might appear. Some nights when it is clear where you are, no NLCs appear. Perhaps that’s because of cloud much farther north blocking the pathย of light from the Sun on the other side of the planet to the clouds on our side of the Earth.
But by the end of July NLC season is coming to an end as the Sun drops farther below the northern horizon at night, and the nights get darker.
So over the next four weeks, look low in the north for night shining clouds.
On the night before the solstice Full Moon, the sky added a coloured halo around the Moon.
On June 19 I was at Waterton Lakes National Park, Alberta to teach a workshop on night photography, as one of the programs of the Park’s annual Wildflower Festival. The night proved hazy, but that added the attraction of an ice crystal halo around the Moon.
The lead image above is from Driftwood Beach, looking south across Middle Waterton Lake. Note Mars shining above the mountains at right.
Earlier in the night, at Red Rock Canyon, we watched the Moon rise in the twilight, then climb up the side of Mt. Blakiston. Here (below) it shines above the summit, surrounded by its hazy halo.
Lunar halo in a hazy sky at Red Rock Canyon, Waterton Lakes National Park, Alberta, with the Full Moon over Mt. Blakiston. This is a high-dynamic range stack of 6 exposures, to avoid the area around the Moon from blowing out too much while recorded detail in the dark foreground. All with the 20mm lens and Nikon D750.
The workshop participants made the best of the night, shooting the moonlit scene down the canyon, toward the north and Cassiopeia.
Nightscape photographer at a workshop I was presenting, shooting Red Rock Canyon in the moonlight at Waterton Lakes National Park, June 19, 2016. Cassiopeia is in the sky to the north. This is a single exposure for 13 seconds at f/2.8 and ISO 800 with the 20mm lens and Nikon D750.
And as here, shooting from the canyon footbridge, toward the very photogenic Anderson Peak, with Jupiter just above the peak.
A workshop group of photographers at Red Rock Canyon at Waterton Lakes National Park, Alberta, during the 2016 Wildflower Festival, June 19, 2016. Taken by the light of the Full Moon at solstice. Jupiter is the bright object behind Anderson Peak.
In keeping with the wildflower theme, I shot wild roses, Alberta’s provincial flower, in the moonlight, with Anderson Peak and stars in the distance.
Alberta wild roses in the moonlight with Anderson Peak in the background, at Red Rock Canyon, Waterton Lakes National Park, Alberta. Taken on Full Moon night June 19, 2016, at a workshop on nightscape imaging I was teaching as part of the Waterton Wildflower Festival. This is a single exposure at f/8 for 20 seconds at ISO 3200 with the 20mm lens and Nikon D750.
While we might like dark skies when going to places like Waterton, there are many magical options for photography when the Moon is shining.
Our video tutorial project is now live on Kickstarter!
For the last two years I’ve been involved in a project to produce a set of comprehensive video tutorials on how to shoot and process Nightscapes and Time-Lapses, to complement myย ebook by the same name.
If you’ve not been able to attend my workshops โ or even if you have! โ these videos will provide you with all the information, and more, in a format you can review over and over.
We’ve shot all the field and studio footage, but to complete the production, we need your help. Back us on Kickstarterand we’ll be able to make the programs available this September, as downloads and on aย shipped USB drive.
Ourย Kickstarter page has all the details. Early backers can purchaseย the tutorial programs now for as little as $55 – and that’s Canadian! โ vs. $80 for the final retail price. The final programs willย provide several hours of instruction, both in the field and at the computer.
If you have not participated in a Kickstarter campaign before, it is no risk. Nothing is charged to your credit card until and when the project is successfully funded after the 30-day campaign. If it isn’t successful, you are charged nothing.
Here’s our promo video describing the programs.
We have 30 days to make our goal. We invite you to joinย usย in making our project a reality.
The nights were short and never fully dark, but early June provided a run of clear nights in the Rockies to enjoy Mars and the Milky Way.
Weather prospects looked good for a run of five nights last week so I took advantage of the opportunity to shoot nightscapes from Banff and, as shown here, in Yoho National Park across the Continental Divide in B.C.
The lead image above is a sweeping panorama at Emerald Lake, one of the jewels of the Rockies. Though taken at 1:30 a.m., the sky still isn’t dark, but has a glow to the north that lasts all night near summer solstice. Even so, the sky was dark enough to reveal the Milky Way arching across the sky.
The mountain at centre is Mt. Burgess, home of the famous Burgess Shale Fossils, an incredible collection of fossilized creatures from the Cambrian explosion.
The image is a panoramic stitch ofย 24 segments but cropped in quite a bit from the original, and all shot with an iPano motorized panning unit. Each exposure was 30 seconds at f/2.2 with the Sigma 24mm lens and Nikon D750 at ISO 4000. One short exposure of the lodge was blended in to reduce its light glare. The original, stitched withย PTGui software, is 15,000 x 9,000 pixels.
The Milky Way over the side pond at Emerald Lake, Yoho National Park, BC., from the bridge to the Lodge. This is a stack of 8 x 25-second exposures for the foreground (mean combined to smooth noise), and one untracked exposure for the sky (to minimize trailing), all at f/2.8 with the Rokinon 14mm lens and Canon 6D at ISO 6400.
The viewย above, a single frame image, shows the view to the south as the Milky Way and galactic centre descend toward the horizon over the south end of the lake. Lights from the Lodge illuminate the trees.
Mars, at right, reflected in Emerald Lake at twilight in Yoho National Park, BC, June 7, 2016. This is a single 6-second exposure at f/3.2 with the Sigma 20mm lens and Nikon D750 at ISO 100.
The next night (above) I was at the same spot to shoot Mars in the deepening twilight, and reflected in the calm waters of Emerald Lake, with Cathedral Peak at left.
This is a vertical panorama of 4 segments, taken with the iPano unit, and with each segment a 30-second exposure at f/2.2 with the Sigma 24mm Art lens and Nikon D750 at ISO 4000. Stitched with Adobe Camera Raw.
Another multi-frame panorama, this time sweeping up from the horizon, captures Cassiopeia (the “W”) and the rising autumn constellations reflected in the lake waters.
Vega is at top, Deneb below it, while the stars of Perseus and Pegasus are just rising.
It was a magical two nights in Yoho, a name that means “wonderful!” Both by day and by night.
โ Alan, June 9, 2016 / ยฉ 2016 Alan Dyer / AmazingSky.com
How many sources of skyglow can you pick out here?
There are at least five:
โข the Milky Way (at left),
โข green airglow (below the Milky Way),
โข all too prevalent light pollution (especially reflected off the clouds coming in from the west at right),
โข lingering blue twilight across the north (at left and right), common in May and June from my northern latitude,
โข and even a touch of aurora right at the northern horizon at far left.
In this scene from May 28, the Milky Way arches over an abandoned pioneer farmstead from the 1930s and 40s near my home in southern Alberta.
Mars (very bright and in some clouds) and Saturn shine at lower centre, while Jupiter is the bright object in clouds at right just above the old house.
Arcturus is the brightest star here at upper right of centre, made more obvious here by shining through the clouds. The Big Dipper, distorted by the map projection used in the this panorama, is at upper right.
Technical: This is a 360ยฐย horizon to zenith panorama taken with the iPano motorized panning unit, using the 24mm lens at f/2.8 and Nikon D750 at ISO 6400, for a stitch of 28 panels, in 4 tiers of 7 segments each. Stitched with PTGui. South is at centre, north to either end. The original is 25,700 x 7,700 pixels.
Just afterย I shot the panorama I captured the International Space Station passingย directly overhead in one of several passes this night.
The second Space Station pass of May 28/29, 2016, at 1:40 a.m., with cloud moving in adding the glows to all the stars. Taken with the 8mm fish-eye lens from home. The Big Dipper is high in the west at right. Mars is bright at bottom, to the south. Several other satellites are in the sky as well. This is a stack of 3 exposures, each 2.5-minutes with the camera on the Star Adventurer tracker.
At this time of year the ISS is lit all night by the Sun that never sets for the astronauts. We see the ISS cross the sky not once but several times in a night at 90-minute intervals.
While the sky near solstice is never dark at my latitude, it does have its compensations and attractions.
โ Alan, May 29, 2016 / ยฉ 2016 Alan Dyer / AmazingSky.com
Mars is now shining brightly in the evening sky, as close and as bright as it has been since 2005.
Look southeast to south after dark and you’ll see a brilliant reddishย “star.” That’s Mars, now at opposition, and retrogradingย slowly westward each night through Scorpius into Libra.
My image above captures Mars set in the entirety of the northern spring sky, complete with the arch of the Milky Way, twilight glows to the north (at left), some satellite trails …
… and Mars itself as the brightest objectย just right of centre shining above the landscape of Dinosaur Provincial Park.
Just to the left of Mars is Saturn, while below both is the star Antares in Scorpius, for a neat triangle of objects. Jupiter is the bright object in Leo at far right.
Technical: I shot the lead imageย on the evening of May 25. It is aย 360ยฐ and horizon-to-zenith panorama stitchedย from 44 images, taken in 4 tiers of 11 panelsย each, shot with aย motorized iOptron iPano mount. I used aย 35mm Canon lens at f/2.8 for 30-second exposures with the Canon 6D at ISO 6400. Iย stitched the images with PTGui. The original image is a monster 32,500 pixels wide by 8,300 pixels high.
This is a stitch in Adobe Camera Raw of 9 segments, each with the Canon 35mm lens at f/5.6 and Canon 6D at ISO 800.
I shot the panorama above earlier in the evening, when Mars and Saturn were just rising in the southeast at left, and the sky to the northwest at right was still bright with twilight.
This shows the geometry of Mars at opposition. It lies opposite the Sun and is so rising at sunset and directly opposite the sunset point. The Sun, Earth and Mars are in a straight line across the solar system with Earth in the middle and as close to Mars as we get.
Actual date of opposition was May 22 but Earth is closest to Mars on May 30. That’s when it will look largest in a telescope. But to the unaided eye it appears as a bright red star.
Mars is approaching! It now shines brightly in the midnight sky as a red star in Scorpius.
You can’t miss Mars now. It is shining brighter than it has since 2005, and is about to come as close to Earth as it has in 11 years as well.
Mars is now approaching opposition, when the Earth comes closest to Mars, and the Sun, Earth and Mars lie along the same line. Opposition date is May 22. That’s when Mars shines at its brightest, at magnitude -2.1, about as bright as Jupiter. Only Venus can be a brighter planet and it’s not in our sky right now.
A week later, on May 30, Mars comes closest to Earth, at a distance of 75 million kilometres. That’s when the disk of Mars looks largest in a telescope. Andย you will need a telescope at high power (150x to 250x) to make out the dark markings, north polar cap, and bright white clouds on Mars.ย
Mars above Antares, with Saturn to the left, low in the south on May 13, 2016, in the moonlight of a waxing quarter Moon, from home in Alberta. This was one week before opposition and two weeks before closest approach, so Mars is particularly bright and red. However, from my latitude of 50ยฐ N Mars appears low in the south. This is a single 15-second exposure, untracked, at f/2.5 with the 35mm lens and Canon 6D at ISO 2000.
In these views, I show Mars shining as a bright reddish star low in my western Canadian sky. I shot the lead image from Dinosaur Provincial Park on May 16. The image just above was from my backyard the night before.
This week, Mars is passing between Beta and Deltaย Scorpii, two bright stars in the head of Scorpius,ย as the red planet retrogrades westward against the background stars.
Saturn shines to the east (left) of Mars now, with both planets shining above the red giant star Antares in Scorpius. In these photos they form a neat triangle.
Even without a telescope to magnify the view, it’ll be rewarding to watch Mars with the unaided eye or binoculars as it treks west out ofย Scorpius into Libra this spring and summer. It stops retrograding on June 30, then starts looping back into Scorpius, for a rendezvous with Antares and Saturn in late August.
This little compilation of time-lapse movies shows Mars, Saturn, and the rest of the sky, rising into the southeast and across the south on two nights this past week.
Be sure to explore Mars this month and next, whether by eye or by telescope. It’s the best we’ve seen it in a decade.
It’s next close approach in 2018 will be even better, though Mars will appear even lower in our northern sky.
The sky and sea present an ever-changing panorama of light and colour from the viewย point of an Australian lighthouse.
Last week I spent a wonderful four nights at the Smoky Cape Lighthouse, in Hat Head National Park, on the Mid-North Coast of New South Wales. I was after panoramas of seascapes and cloudscapes, and the skies didn’t disappoint.
At sunset, as below, the sky to the east glowed with twilight colours, with the bright clouds providing a beautiful contrast against the darkening sky. The kangaroo at far right was an added bonus as he hopped into frame just at the right time.
A 270ยฐ or so panorama of the Smoky Cape Lighthouse near South West Rocks on Trial Bay, NSW, Australia, and in Hat Head National Park. This is a stitch of 12 segments, each a single 1.6-second exposure at f/8 with the 35mm lens in landscape orientation. Stitching with Adobe Camera Raw.
At sunrise, the Sun came up over the ocean to the east, providing a stunning sceneย to begin the day.
I shot this at dawn on April 28, 2016. This is a 7-section panorama with each section being a 5-exposure HDR stack, all stacked and stitched in Adobe Camera Raw.
The Smoky Cape Lighthouse was lit up for the first time inย 1891. It was staffed for decades by three keepers and their families who lived in the cottages visible in the panoramas above. They tended to the kerosene lamps, to cleaning the lenses, and to winding the weight-driven clockwork mechanism that needed resettingย every two hours to keep the reflector and lens assembly turning. By day, they would draw the curtains across to keep the Sun from heating up the optics.
The huge optical assembly uses a set of nine lenses, each a massive fresnel lens, to shot focused beams out to sea. The optics produce a trio of beams, in three sets.
Each night you could see the nine beams sweeping across the sky and out to sea, producing a series of three quick flashes followed by a pause, then another three flashes, the characteristic pattern of the Smoky Bay Light. Each lighthouse has its own flashing pattern.
Beams from the Smoky Cape Lighthouse in the twilight sky, beaming out beside the stars of the Southern Cross and the Pointers (Alpha and Beta Centauri) below, rising into the southeast sky in the deepening blue twilight. This is a single 0.6-second exposure at f/2.8 with the 35mm lens and Canon 6D at ISO 6400.
The lead photo, repeated above, shows the beams in the twilight, with the stars of the Southern Cross as a backdrop. Three beams are aimed toward the camera while the otherย two sets of beam trios are shooting away out to sea.
The image below shows the beam trio shining out over the water toward one of the dangerous rocks off shore.
The trio of beams from the Smoky Cape Lighthouse scanning across the sea and sky in an exposure shot as short as possible to freeze the beams. This is a single 1.6-second exposure at f/1.4 and ISO 12800, wide and fasrt to keep the beams from blurring too much.
The Lighthouse was converted to electricity in 1962, when staff was reduced. Then in the 1980s all lighthouses were automated and staff were no longer needed.
While we might romanticize the life of a lighthouse keeper, it was a lonely and hard life. Keepers were usually married, perhaps with children. While that may have lessened the isolation, it was still a difficultย life for all.
Today, some of the cottages have been converted into rentable rooms. I stayed in the former house of the main light keeper, filled with memorabilia from the glory days of staffed lighthouses.
The Southern Cross, Crux, and the Pointer Stars, Alpha and Beta Centauri, above in the moonlight of the waning gibbous Moon before dawn, from the Smoky Cape Lighthouse looking southwest, on the coast of New South Wales, Australia. The Cape was named by James Cook in 1770 for the fires he saw on shore here. This is a single 5-second exposure at f/2.8 with the 35mm lens and Canon 6D at ISO 1000.
The image above takes in the Southern Cross over the moonlit beach in the dawn twilight.
The last image below is my final astrophoto taken on my current trip to Australia, a 360ยฐ panorama of the Milky Way and Zodiacal Light from the back garden of the Lighthouse overlooking the beach at Hat Head National Park.
A 360ยฐ panorama and from horizon to zenith of the southern sky and Milky Way from Smoky Cape and the grounds of the Lighthouse and Cottages. The panorama is a stitch of 9 segments, each shot with the 15mm full-frame fish-eye lens in portrait orientation, and at f/2.8 with the Canon 6D at ISO 3200. All exposures 1 minute, untracked on a tripod. Stitched in PTGui using equirectangular projection.
It’s been a superb trip, with over half a terabyte of images shots and processed! The last few blogs have featured some of the best, but many more are on the drives for future posts.
When visiting southern latitudes nothing disorients a northern hemisphere astronomer more than seeing our familiar Moon turned โthe wrong way!โ
With the Moon now dominating the night sky, my photo attention in Australia turns to it as my celestial subject.
Itโs wonderful to see the Moon as a crescent phase in the evening sky, but now flipped around so it looks like the Moon we see from home upย north when it is a waning crescent in the morning.
However,ย the lead image above actually shows the waxing crescent in the evening. It shines above the volcanic hills near Warrumbungles National Park, with the added silhouette of the dome of the Australian Astronomical Telescope, the largest optical telescope in Australia.
After a lifetime of seeing the Moon in its northerly orientation, seeing the austral Moon throws off your sense of time and direction. Are we looking west in the evening? Or east in the morning? The Moon just doesnโt make sense!
This is a two-exposure composite: a long exposure for the sky and ocean, and a short exposure for the disk of the Moon itself, to preserve some detail in the disk, specifically the mare areas to show the face of the Moon and not an overexposed white disk. Both with the 135mm telephoto and Canon 6D, from Woolgoolga, NSW.
Then thereโs the Full Moon. It rises in the east, as does the Sun. But like the Sun, the “down under Moon”ย moves from right to left across the northern, not southern sky. And the familiar โMan in the Moonโ figure is upside down, as seen above.
The photo above is from Friday night, and shows the Full Moon rising in the northeast over the Pacific Ocean.
The apogee Full Moon of April 22, 2016 rising over the Pacific Ocean and lighting the waters with a golden glitter path of reflected moonlight. I shot this from the Woolgoolga Headlands viewpoint, with the 135mm telephoto and Canon 6D. This is a high dynamic range stack of 5 exposures to compress the range in brightness. Even so, the Moon itself is still overexposed.
This “HDR”ย image above from earlier in the evening captures the golden glitter path of moonlight on the ocean waves. I photographed these Full Moon scenes from the Headlands viewpoint at Woolgoolga, a great spot for panoramic seascapes.
The Full Moon this night was the apogee Full Moon of 2016 โ the smallest and most distant Full Moon of the year, the opposite of a “supermoon.”
This is a high dynamic range stack of 7 exposures to preserve the range in brightness between the bright sky and Moon, and the dark ground in the dim twilight.
Earlier in the week I was inland, high on the New England Tablelands in New South Wales. This image shows the waxing gibbous Moon in the evening twilight over Ebor Falls on the Guy Fawkes River, one of the few waterfalls on the famed Waterfall Way in New Soith Wales that has water flowing year round.
From southern latitudes the most amazing region of the sky shines overhead late on austral autumn nights.ย
There is no more spectacular part of the Milky Way than the regions around its galactic centre. Or at least in the direction of the galaxyโs core.
We canโt see the actual centre of the Galaxy, at least not with the cameras and telescopes at the disposal of amateur photographers such as myself.
It takes large observatory telescopes equipped with infrared cameras to see the stars orbiting the actual centre of the Milky Way. Doing so over many years reveals stars whipping around an invisible object with an estimated 4 million solar masses packed into the volume no larger than the solar system. Itโs a black hole.
By comparison, looking in that direction with our eyes and everyday cameras, we see a mass of stars in glowing clouds intersected by lanes of dark interstellar dust.
The top image shows a wide view of the Milky Way toward the galactic centre, taking in most of Sagittarius and Scorpius and their incredible array of nebulas, star clusters and rivers of dark dust, all located in the dense spiral arms between us and the galactic core.
This is a mosaic of 6 segments, each segment being a stack of 4 x 3-minute exposures at f/2.8 with the 135mm Canon L-Series
Zooming into that scene reveals a panoramic close-up of the Milky Way around the galactic centre, from the Eagle Nebula in Serpens, at left, to the Catโs Paw Nebula in Scorpius, at right.
This is the richest hunting ground for stargazers looking for deep-sky wonders. Itโs all here, with field after field of telescopic and binocular sights in an area of sky just a few binocular fields wide.
The actual galactic core area is just right of the centre of the frame, above the bright Sagittarius StarCloud.
This is a stack of 5 x 5 minute exposures with the Borg 77mm f/4 astrograph and filter-modified Canon 5D MkII at ISO 1600, taken from Tibuc Cottage near Coonabarabran, NSW, Australia.
Zooming in again shows just that region of sky in an even closer view. The contrast between the bright star fields at left and the dark intervening dust at right is striking even in binoculars โ perhaps especially in binoculars.
The visual impression is of looking into dark canyons of space plunging off bright plateaus of stars.
In fact, it is just the opposite. The dark areas are created by dust much closer to us, hiding more distant stars. It is where the stars are most abundant, in the dust-free starclouds, that we see farthest into the galaxy.
In the image above the galactic centre is at right, just above the small diffuse red nebula. In that direction, some 28,000 light years away, lurks the Milky Wayโs monster black hole.
This is a stack of 5 x 6-minute tracked exposures with the 15mm fish-eye lens at f/4 and Canon 5D MKII at ISO 1600. The trees appear to be swirling around the South Celestial Pole at lower right above the Cottage.
To conclude my tour of the galactic centre, I back out all the way to see the entire sky and the Milky Way stretching from horizon to horizon, with the galactic centre nearly overhead in this view from 3 a.m. earlier this week.
Only from a latitude of about 30ยฐ South can you get this impressive view, what I consider one of the top โbucket-listโ sights the sky has to offer.
Last week, northerners marvelled at the splendours of the southern hemisphere sky from a dark site in Australia.
Iโve attended the OzSky Sky Safari several times and have always come away with memories of fantastic views of deep-sky wonders visible only from the southern hemisphere.
This year was no exception, as skies stayed mostly clear for the seven nights of the annual star party near Coonabarabran, New South Wales.
About 35 people from the U.S., Canada and the U.K. attended, to take in views through large telescopes supplied by the Australian branch of the Texas-based Three Rivers Foundation. The telescopes come with the best accessory of all: knowledgeable Aussies who know the southern sky and are delighted to present its splendours to us visiting sky tourists.
Here are a few of the night scenes from last week.
The lead image above shows a 360ยฐ panorama of the observing field and sky from early in the evening, as Orion sets in the west to the right, while Scorpius rises in the east to the left. The Large Magellanic Cloud is at centre, while the Southern Cross shines to the upper left in the Milky Way.
This is a stitch of 8 panels, each with the 14mm Rokinon lens at f/2.8 and mounted vertical in portrait orientation. Each exposure was 2.5 minutes at ISO 3200 with the Canon 5D MkII, with the camera tracking the sky on the iOptron Sky Tracker. Stitched with PTGui software with spherical projection.
This panorama, presented here looking south in a fish-eye scene, is from later in the night as the galactic core rises in the east. Bright Jupiter and the faint glow of the Gegenschein are visible at top to the north.
Each night observers used the big telescopes to gaze at familiar sights seen better than ever under Australian skies, and new objects never seen before.
This is a stack of 4 x 5 minute exposures with the Rokinon 14mm lens at f/2.8 and Canon 5D MkII at ISO 1600, all tracked on the iOptron Sky Tracker, plus one 5-minute exposure untracked of the ground to prevent it from blurring. The trees are blurred at the boundary of the two images, tracked and untracked.
The Dark Emu of aboriginal sky lore rises above some of the 3RF telescopes.
This is a single untracked 13-second exposure with the 35mm lens at f/2 and Canon 6D at ISO 6400.
Carole Benoit from Calgary looks at the Orion Nebula as an upside-down Orion sets into the west.
This is a single untracked 10-second exposure with the 35mm lens at f/2 and Canon 6D at ISO 6400.
John Bambury hunts down an open cluster in the rich southern Milky Way near Carina and Crux.
ย This is a single 13-second untracked exposure with the 35mm lens at f/2 and Canon 6D at ISO 6400.
David Batagol peers at a faint galaxy below the Large Magellanic Cloud, a satellite galaxy to our Milky Way.
It was a night to remember, when the sky exploded with a jaw-dropping display of Northern Lights.
Warnings went out around the world and the aurora meters were hitting high numbers. By sunset we were charged up with high expectations of seeing the aurora in high gear dancing in the twilight. We were not disappointed.
From our location at the Churchill Northern Studies Centre near Churchill, Manitoba (latitude 58ยฐ North), we see aurora almost every clear night, even whenย indicators are low.
But this night, the Index was reading 7 on the scale of 0 to 9. I was afraid, after all the effort to come north to see the Lights, the Lights would abandon us and head south. Not so!
The night did startย with the Lights in the south, as shown in the panorama image at top. It takes in a fullย 360ยฐ, with the aurora arcing from east to west across the southern sky in Orion. The north over the Centre is clear.
But the curtains soon moved back north and engulfed most of ourย sky for most of the rest of the night.
Participants in our aurora tour group took their aurora “selfies,” and just looked up in awe at one of nature’s great sky shows. When the last of the group turned in at 2:30 a.m. the Lights were still going.
What follows is a selection โ just a few! โ of the still shots I took. I also shot time-lapse sequences and real-time videos. All those will take more editing to turn them into a music video, still to come.
Enjoy!
A lone observer gazes skyward at the start of a wonderful aurora display on March 6, 2016, as the curtains begin to appear and dance in the deep blue twilight. This was at the Churchill Northern Studies Centre, Churchill, Manitoba.
A lone observer gazes at an array of colourful curtains of aurora during an active display, March 6, 2016, with curtains in the evening twilight adding blue tints to the sky and tops of the curtains, as well as the greens and reds from oxygen. Curtains toward the horizon are more yellow due to atmospheric extinction. Jupiter is rising at left, then near opposition.
Auroral curtains converge at the zenith in the evening twilight during a Kp Index 7 night of aurora in Churchill, Manitoba. Blue twilight adds the blue tints to the sky and curtains.
Our group of Learning Vacations tourists enjoy the start of a fine display of Northern Lights at the Churchill Northern Studies Centre, March 6, 2016. As curtains appear to the east, another array of curtains shines to the west behind them with a strong purple tint lighting the sky and ground. The Andromeda Galaxy sits amid the curtains.
Aurora watchers looking south to a bright curtain of Northern Lights while other curtains rippled behind them to the north. This was a fabulous all-sky display, March 6, 2016. The temperature was about -25ยฐ C.
The green aurora lights the ground and snow green in a spectacular display March 6, 2016. This is looking northeast from the Churchill Northern Studies Centre, Churchill, Manitoba.
A series of curtains of aurora, in a layered series across the sky, from the March 6, 2016 display in Churchill, Manitoba,
The aurora over the Churchill Northern Studies Centre building, home to Arctic research and to many programs for tourists about northern ecology and science. The March Learning Vacations aurora tour group experienced a fabulous display this night, March 6, 2016.
Some of our group of Learning Vacations aurora tourists outside the Churchill Northern Studies Centre enjoying the sky show on March 6, 2016 on a night with a Level 5 to 7 aurora.
What do you see in the swirling patterns of aurora curtains at the zenith? They rapidly take many forms as they move about. This was the wonderful display of March 6, 2016.
I present a sweeping panorama of the winter and spring stars on a February night.ย
The lead image is a panorama I shot last Saturday, February 27 that takesย in about 200ยฐ of sky from northeast to west, and nearly to the zenith. It encompasses most of the northern spring and winter stars and constellations.
I’ve added the labels to help you pick out the celestial highlights. The winter sky, containing Orion as the central constellation, is at right setting into the west. This area of skyย contains a rich collection of bright stars and identifiable constellations.
The left side of the sky containsย the spring constellations, now coming into view in the east. Note how that area of sky is sparsely populated by bright stars. You can see the Big Dipper, Regulus in Leo, and Arcturus rising at lower left.
The reason for the difference is the Milky Way โ you can see it at right arcing up from the southern horizon passing by Orion and through Gemini, Taurus and Auriga. In that direction we are looking intoย the outlyingย spirals arms of our galaxy, toward rich areas of star formation.
To the east, at left, we are looking at right angles out ofย the plane of our spiral galaxy, toward the galactic North Pole, here just left of Leo. In that direction there are very few bright stars between us and the starless depths of intergalactic space. The spring sky is rather blank compared to the rich winter sky.
But you can see Jupiter, the brightest object in view here, and now prominent in the evening sky.
Note one other subtle glow just above Jupiter. Thatย diffuse glow is the Gegenschein, caused by sunlight reflecting off interplanetary dust opposite the Sun in ourย solar system and in the plane of the ecliptic.
Jupiter is just east (left) of the Gegenschein here, as Jupiterย was thenย just overย aย week before its date of opposition, March 8. By then the Gegenschein will have moved to superimpose right over Jupiter, asย both then lieย opposite the Sun.
I shot this scene from home on February 27, 2016, using the new iOptron iPano motorized โgigapanโ unit, which I programmed to move and shoot 36 exposuresย with the Canon 5D MkII and 35mm lens, arranged in 4 rows high with 9 panels wide in each row from east to west. The resultย is a huge mosaic,ย 24,000 by 10,000 pixels.
Each exposure was 25 seconds at f/2 and at ISO 3200. The camera was not tracking the sky. I stitched the 36 segments with PTGui using itsย Spherical Fisheye projection. The imageย has black margins but I think theย circular format is more suggestive of the spherical dome of the sky above and around you. But that’s me, a longtimeย planetarium show producer.
Next time I will shoot the zenith cap images as well!
From Churchill, Manitoba the Northern Lights dance almost every night over the boreal forest.
This year, as in the last two years, I have traveled to the shores of a frozen Hudson Bay and to the town of Churchill, Manitoba to view and photograph the aurora borealis.
I’m instructing two tour groups at the Churchill Northern Studies Centre, one this week and one last week, in the science and sagas of the aurora and on how to shoot the Lights. The participants in the groups are fabulous, keenly interested and unfazed by the cold and wind.
From Churchill’s latitude of 58ยฐ N, we are under the main auroral oval almost every night. Even on nights with low official activity levels, as they were on all the nights I shot these images, we still get sky-filling displays.
Here’s a selection of still images from the last week of shooting, with clear skies on all but a couple of nights. There’s still room in our March sessions!
Circumpolar star trails and aurora over the boreal forest at the Churchill Northern Studies Centre, Churchill, Manitoba, on Feb 9, 2016. This is a stack of 250 frames shot over one hour (until the battery died) for a time-lapse but here stacked for a single image star trail using the Advanced Stacker Plus actions and Long Streaks effect. Each exposure was 15 seconds at f/2.8 with the 15mm lens and Canon 6D at ISO 6400.
An all-sky aurora display of multiple curtains of aurora borealis over the boreal forest at the Churchill Northern Studies Centre, in Churchill, Manitoba, taken on Feb 5, 2016. The view is looking almost due north. Jupiter is at right. The Big Dipper is at centre frame. This is one frame from a 380-frame time-lapse sequence shot for digital dome projection in planetariums. This is a 20-second exposure at f/5 (stopped down by accident โ should have been f/3.5) with the 8mm Sigma fish-eye lens and Canon 6D at ISO 3200. Temperature was -35ยฐ C. But no wind!
Participants in the Arctic Skies tour and course observe and photograph the Northern Lights from the upper level observing deck at the Churchill Northern Studies Centre, Churchill, Manitoba on Feb 10, 2016, the first night of their tour. A Level 1 to 2 display provided a good first night show though with bitterly cold temperatures and wind chills of near -50ยฐ C. This is a single exposure of 8 seconds at f/1.4 with the 20mm Sigma Art lens and Nikon D750 at ISO 3200.
The Northern Lights over the Churchill Northern Studies Centre on Feb 8/9, 2016 during a weak all-sky display. The arcs lay primarily in the south when the display was at its best this night. Orion and the Pleiades are just setting in the west over the town of Churchill. This is a 20 second exposure at f/2.8 with the 15mm full-frame fish-eye lens and Canon 6D at ISO 3200.
A panorama across the northern horizon of the sweeping curtains of the aurora, taken from the observation deck of the Churchill Northern Studies Centre, Manitoba. I shot this on Feb 10, 2016 on the first night of the Arctic Skies tour group week. Vega is low in the north at left of centre, Arcturus is the bright star at right of centre. This is a 4-segment panorama, stitched with Adobe Camera Raw, with each segment 5 seconds at f/1.4 with the 20mm Sigma lens and Nikon D750 at ISO 3200.
Curtains of the aurora looking northeast and east toward Leo rising (at upper right) and Jupiter (at right), over the boreal forest of the Hudson Bay Lowlands near Churchill, Manitoba, on Feb 5, 2016. This is a single frame from a 680-frame time-lapse. This is a 4-second exposure at f/1.4 with the Sigma 20mm Art lens and Nikon D750 at ISO 3200.
Vertical curtains of aurora converging to the zenith overhead over the snowy boreal forest at the Churchill Northern Studies Centre, Churchill, Manitoba. I shot this Feb 4, 2016 on a night with temperatures of -35ยฐ C with a slight wind. The Big Dpper is at right. Exposure was 10 seconds at f/2.8 with the 15mm lens anf Canon 6D at ISO 3200.
A lone figure gazes skyward at the aurora over the Churchill Northern Studies Centre, Churchill, Manitoba. I shot this Feb 4, 2016 on a night with temperatures of -35ยฐ C with a slight wind. Exposure was 13 seconds at f/2.8 with the 15mm lens anf Canon 6D at ISO 3200.
A wide vertical portrait of the Northern Lights in the northern sky, with the stars of the Big Dipper and Polaris above centre. Shot from the upper deck of the Churchill Northern Studies Centre on a very windy night with wind chills of -50ยฐ, so standing in the wind to take this image was bitter! You grab a few images and retreat! This is a single 15-second exposure at f/2.8 with the 15mm lens and Canon 6D at ISO 3200.
The February Arctic Skies tour group watching and photographing the aurora from the second floor deck of the Churchill Northern Studies Centre, where it is out of the wind, which this night was producing -50ยฐ C wind chills. This is a single 6-second exposure at f/2.8 with the 15mm lens and Canon 6D at ISO 6400.
A self-portrait of me watching the Northern Lights from the upper deck of the Churchill Northern Studies Centre, looking south to the winter stars of Orion, Gemini and Auriga. This was Feb 11, 2016, a very windy, almost blizzard night with blowing snow and reduced visibility. However the aurora did appear through the haze and clouds. In the distance are the buildings of the old Churchill Rocket Range. This is a single 15-second exposure at f/2.8 with the 15mm lens and Canon 6D at ISO 3200.
Orion appears in his winter element, over snowscapes on crisp January nights.
A couple of clear-ish winter nights this past weekend allowed me to capture that most iconic of constellations, Orion, over snowy landscapes close to home here in Alberta.
At top, he rises over the famous Hoodoos near East Coulee, Alberta in the Red Deer River valley. Clouds moving in on Sunday night, January 10, added the photogenic glows around the stars, emphasizing their colour and brilliance.
Here, from a shot on Saturday, January 9, Orion appears down the end of my rural country Range Road, with Sirius, his companion Dog Star, following at his heels above the treetops and in some haze.
If this looks cold, it was โ at minus 25ยฐ C. Though two hours later it was only -15ยฐ C and by morning it was 0ยฐ C. Winter in Alberta!
Both images are short exposures, 10 to 15 seconds, at f/2 or f/2.8 with the wonderful Sigma 24mm Art lens and my new favourite camera, the Nikon D750 at ISO 3200. In both cases the ground is from a stack of several exposures to smooth noise but the sky is from a single exposure to minimize star trailing.
The waning Moon joined Venus and Saturn on a cold winter dawn.
This was the scene this morning, January 6, as the waning crescent Moon met with Venus (bright, at centre) and Saturn (below and left of Venus) in the cold morning twilight.
The grouping appeared above the stars of Scorpius. Antares is just above the treetops.
The top image is with the Canon 60Da and 50mm lens.
The view below, with the 135mm telephoto and Canon 6D camera, is from a half hour earlier before the sky began to brighten with morning twilight.
The waning crescent Moon above Venus and Saturn (dimmer and below Venus) in the pre-dawn sky on January 6, 2016, taken from home on a cold winter morning at -20ยฐ C. This is a composite of a long exposure (8s) for the ground, a slightly shorter exposure (6s) for the sky, and shorter exposures for the Moon to avoid it being totally overexposed and to preserve the Earthshine. All with the 135mm lens and Canon 6D.
Venus passes very close to Saturn this weekend, with the two worlds appearing within a telescope field on the mornings of January 8 and 9. Get up early before sunrise and look southeast. Binoculars will provide a superb view.
Venus is hard to miss, but is now dropping lower each morning and will soon be gone from view as it ends its wonderful appearance as a morning star.
Meteors from the Geminid shower rain over the dishes of the VLA radio telescope.
Sunday night was a prime night for the annual Geminid meteor shower, one of the best of the year. To capture it, I traveled to the Plains of San Agustin in the high desert of New Mexico.
It’s there that the National Radio Astronomy Observatory operates the 27 dishes of the Very Large Array radio telescope, one of the most photogenic โ and photographed โ astronomical facilities in the world.
I set up at a viewing point near the entrance, to look northwest over the dishes, arrayed that night, and all season, in itsย most compact configuration, with all the dishes clustered closest together.
It was an active meteor shower! One particularly bright meteor left a persistent “train” โ a smoke trail that lasted over 15 minutes. It creates the fuzzy cloud around the meteor at right. The bright bolide is on two frames, as the shutter closed then opened again as the meteor was still flying! So its bright streak gotย cut in two. Pity!
I shot with two cameras. The image here is from one, using a 35mm lens to shoot 334 frames over 3 hours. Each exposure was 32 seconds at f/2 and at ISO 3200.
I’ve taken about two dozen of the frames, the ones with meteors, and stacked them here, with the sky and ground coming from one frame. The camera was not tracking the sky.
Bands of natural airglow and clouds illuminated by the lights of Albuquerque to the north add colour to the sky.
I would have shot for longer than three hours, but this was a very cold night, with a brisk wind and temperatures below freezing. A snowstorm had even closed some roads the day before. Three hours was enough on the high plains of San Agustin this night.
What a morning of sky sights, both before dawn and after sunrise.
December 7 โ This was the prime day I came to Arizona to enjoy, to be better assured of clear skies. As it turned out this will likely be the cloudiest day of the week here, but skies were clear enough for a fine view of a conjunction and an occultation. The comet was a bonus.
This is a stack of 5 exposures: 30, 8, 2, 0.5 and 1/8s, blended with luminosity masks as HDR would not blend images with such a large range of brightness and content, with the shortest exposures having almost no content execept for two bright objects! The camera was on the iOptron Sky-Tracker to follow the sky and keep the sky targets stationary and aligned, thus the blurred foreground. All with the 135mm lens at f/2.8 and Canon 6D at ISO 400.
At 4 a.m. the waning crescent Moon rose accompanied by Venus, as the two worlds appeared in close conjunction in the pre-dawn sky. The view above captures the scene as the Moon and Venus rose over the Peloncillo Mountains of New Mexico. Comet Catalina is in this scene but barely visible.
This is a stack of 6 exposures: 30, 8, 2, 0.5, 1/8s and 1/30s, blended with luminosity masks as HDR would not blend images with such a large range of brightness and content, with the shortest exposures having almost no content execept for two bright objects! The camera was on the iOptron Sky-Tracker to follow the sky and keep the sky targets stationary and aligned. All with the 135mm lens at f/2.8 and Canon 6D at ISO 800.
An hour or so later, with the Moon and Venus higher and with skies a little less cloudy, I was able to capture this scene, above, that included Comet Catalina, as a tiny blue dot next to Venus and the Moon. But if I hadnโt labeled it, you wouldnโt know it was there! The comet is proving to be less wonderful than anticipated, and any cloud dims the view even more.
I had hoped for a superb scene of a bright comet next to the two brightest objects in the night sky. But comets do what comets do โ surprise people with unexpected brightness (as Comet Lovejoy did last January) or with disappointing dimness … or by disappearing altogether, as Comet ISON did two years ago. I came here in December 2013, to this same location on the Arizona-New Mexico border, to catch ISON but no luck there at all!
This is a stack of 7 exposures from 10 seconds to 0.3 seconds at 1 stop intervals and blended with luminosity masks, to compress the huge range in brightness from the bright Moon and Venus, plus horizon sky, and the darker sky and sunrise clouds. All with the 35mm lens and Canon 6D.
Regardless of the comet, the conjunction of the Moon and Venus was stunning, about as good as such events get. Hereโs the view, above, an hour later again, with the eastern sky brightening in the dawn twilight. The only thing that would have made this event even more spectacular is if the Moon had actually covered up Venus in this twilight sky. Not quite.
The occultation of Venus by the waning crescent Moon in the daytime on Monday, December 7 at 9:30 am local time. This is just about 3 minutes before the actual occultation as the advancing Moon is about to cover Venus on the bright limb of the Moon. This is a frame from a 100-frame time lapse. Unfortunately, as I shot this on my trip to Arizona, I did not have more focal length than the 135mm and 1.4x extender used here.
For the occultation itself, we had to wait until well after sunrise for an event in the blue daytime sky, at 9:30 a.m. local time.
All of North America got to see this fairly rare occultation of Venus by the Moon, albeit in the daytime. Nevertheless, the two objects are so bright, this was visible to the unaided eye, even with some cloud about. In binoculars it was wonderful.
To shoot it, all I had was a telephoto lens, so the image scale doesnโt do the event justice. But the image above provides a good impression of the binocular view, with Venus as a brilliant jewel on the โringโ of the Moon.
I got the comet but it isn’t what was hoped for โ a faint fuzzball in binoculars.
This was Comet Catalina (aka C/2013 US10) in the dawn sky this morning, December 6, with the comet appearing as a fuzzy star below brilliant Venus in binoculars, and just revealing its two short tails in photos. It’s the cyan-colored object near the centre. Venus is the brilliant object.
This image is with a telephoto lens, and coversย a little more of the sky than typical binoculars would show. I knew this would be a binocular comet at best, but it’s barely that. This is more a comet for telescopes.
But as the Moon departs the scene and the comet climbs higher the view may improve. Still, if you are pining for views of Comet Catalina and are stuck under cloudy winter skies at home, don’t be worried. You aren’t missing too much. Except …
The arch of the Milky Way in the northern autumn and early winter sky, from Arizona on December 5, 2015. The Milky Way extends from Aquila to the left, in the southwest to Cassiopeia at top right, to Perseus and Auriga at far right, in the northeast. I shot this from the Quailway Cottage near Portal, Arizona, latitude +32ยฐ N. The view is looking north toward the celestial pole. Polaris is just right of lower centre. This is a stack of 8 tracked exposures, each 3 minutes at f/2.8 with the 15mm lens and Canon 6D at ISO 1600, with the ground coming from one exposure to minimize blurring. The camera was on the iOptron Sky-Tracker.
This was the view of the autumn Milky Way from here in Arizona last night. Pretty impressive under nearly perfect sky conditions. And then there’s this …
Orion and the northern winter constellations and Milky Way setting at dawn over the Chiricahua Mountains of southwest Arizona, near Portal, AZ. The waning crescent Moon in the west provided the illumination in this dawn shot from December 6, 2015. Orion is just above the main peak at centre, with Sirius, in Canis Major, to the left and Aldebaran, in Taurus, to the right. The Pleiades are setting at right. The star cluster at top is the Beehive, M44, in Cancer. Bands of airglow add the red streaks. The site is the Quailway Cottage near Portal, Arizona. This is a stack of 4 x 2 minute exposures, tracked, at f/3.5 with the 15mm full-frame fish-eye lens and Canon 6D at ISO 1250, for the sky, and the same specs for 4 exposures, untracked for the ground. Each set was mean-combined stacked to reduce noise.
This was the winter Milky Way with Orion setting into the west over the Chiricahuas at dawn. Turn around from looking at the comet and thisย was the view. So who cares if the comet isn’t too great? There’s lots more to see and shoot. With no snow, no frost, no dew.
The summer Milky Way sets into the southwest on a late November night.
On Saturday, November 28, well into winter here in Alberta, the stars of the Summer Triangle and the summer Milky Way set into the southwest on a clear, though slightly hazy, late November night.
This is the last of the summer Milky Way, with the centre of the Galaxy now long gone, but the Summer Triangle stars remaining in the evening sky well into autumn. Glows from light pollution in the west light the horizon, in a quick series of images shot in my rural backyard.
In the Summer Triangle, Vega is at right, as the brightest star; Deneb is above centre, and Altair is below centre, farthest south in the Milky Way.
I shot this as a test image for the Nikkor 14-24mm lens, here wide-open at f/2.8 and at 14mm, where it performs beautifully, with very tight star images to the corners. It does very well at 24mm, too! This is astonishing performance for a zoom lens. It matches or beats many “prime” lenses for quality.
The camera was the 36-megapixel Nikon D810a, Nikon’s “astronomical DSLR” camera, also on test. Here it shows its stuff by picking up the red nebulas in Cygnus and Cepheus.
Thorough tests of both the camera and lens will appear later in the year. Stay tuned.
Do subscribe to my blog (click below) to get email notices of new entries.
For the even more technically-minded, this image is a stack, mean combined, of five 2-minute tracked exposures, at f/2.8 and ISO 800. The camera was on the iOptron Sky-Tracker. So the stars are not trailed but the ground is! I made no attempt here to layer in an untracked ground shot, as there isnโt much detail of interest worth showing, quite frankly.
At least not in the ground. But the Milky Way is always photogenic.
Orion ascends into the sky on a clear autumn night, with its stars drawing trails behind it as it rises.
Only on November nights is it possible to capture Orion rising in the evening sky. Here, I used the light of the waxing gibbous Moon to illuminate the landscape … and the sky, creatingย the deep blue tint.
The lead image above is an example of a star trail, a long exposure that uses Earth’s rotation to turn the stars into streaks across the sky. In the old days of film you would create such an exposure by opening the shutter for an hour or more and hoping for the best.
Today, with digital cameras, the usual method is to shoot lots of short exposures, perhaps no more than 20 to 40 seconds each in rapid succession. You then stack them later in Photoshop or other specialized software to create the digital equivalent of a single long exposure.
The image above is a stack of 350 images taken over 2.5 hours.
With a folder of such images, you can either stack them to create a single image, such as above, or string them together in time to create a time-lapse of the stars moving across the sky. The short video below shows the result. Enlarge the screen and click HD for the best quality.
For the still image and time-lapse, I used the Advanced Stacker Plus actions from StarCircleAcademyto do the stacking in Photoshop and create the tapering star trail effect. A separate exposure after the main trail set added the point-like stars at the end of the trails.
My tutorial on Vimeo provides all the details on how to shoot, then stack, such a star trail image…
… While this video illustrates how to capture and process nightscapes shot under the light of the Moon.
Learn the basics of shooting nightscape and time-lapse images with my three new video tutorials.
In these comprehensive and free tutorials I take you from “field to final,” to illustrate tips and techniques for shooting the sky at night.
At sites in southern Alberta I first explain how to shoot the images.ย Then back at the computer I step you through how toย process non-destructively, using images I shot that night in the field.
Tutorial #1 โ The Northern Lights
This 24-minute tutorial takes you from a shoot at a lakeside site in southern Alberta on a night with a fine aurora display, through to the steps to processing a still image and assembling a time-lapse movie.
Tutorial #2 โ Moonlit Nightscapes
This 28-minute tutorial takes you from a shoot at Waterton Lakes National Park on a bright moonlit night, to the steps for processing nightscapes using Camera Raw and Photoshop, with smart filters, adjustment layers and masks.
Tutorial #3 โ Star Trails
This 35-minute tutorial takes you from a shoot at summer solstice at Dinosaur Provincial Park, then through the steps for stacking star trail stills and assembling star trail time-lapse movies, using specialized programs such as StarStaX and the Advanced Stacker Plus actions for Photoshop.
As always, enlarge to full screen for the HD versions. These are also viewable at my Vimeo channel. ย
In a “10 Steps”ย tutorial I review my tipsย for goingย from “raw to rave” in processing a nightscape or time-lapse sequence.
NOTE: Click on any of the screen shots below for a full-res version that willย be easier to see.
In my preferred โworkflow,โ Steps 1 through 6 can be performed in either Photoshop (using its ancillary programs Bridge and Adobe Camera Raw) or in Adobe Lightroom. The Develop module of Lightroom is identical to Adobe Camera Raw (ACR for short).
However, my illustrations show Adobe Bridge, Camera Raw and Photoshop CC 2014. Turn to Photoshop to perform advanced filtering, masking and stacking (Steps 7 to 10).
To useย Lightroom to assemble a time-lapse movie from processed Raw frames you needย the third-party program LRTimelapse, described below. Otherwise, you need to export frames from Lightroom โ or from Photoshop โ as “intermediate” JPGs (see Step 6), then use other third party programs to assemble them into movies (Step 10B).
–
Step 1 โ Bridge or Lightroom โ Import & Select
Use Adobe Bridge (shown above) or Lightroom to import the images from your cameraโs card.
As you do so you can add โmetadataโ to each image โ your personal information, copyright, keywords, etc. As you import, you can also choose to convert and save images into the open and more universal Adobe DNG format, rather than keep them in the cameraโs proprietary Raw format.
Once imported, you can review images, keeping the best and tossing the rest. Mark images with star ratings or colour labels, and group images together (called โstackingโ in Bridge), such as frames for a panorama or โhigh dynamic rangeโ set.
Always save images to both your working drive and to an external drive (which itself should automatically back up to yet another external drive). Never, ever save images to only one location.
–
Step 2 โ Adobe Camera Raw or Lightroom โ Basics
Open the Raw files you want to process. From Bridge, double click on raw images and they will open in ACR. In Lightroom select the images and switch to its Develop module.
In Adobe Camera Raw be sure to first set the Workflow Preset (the blue link at the bottom of the screen) to 16 bits/channel and ProPhoto RGB colour space, for maximum tonal range. This is a one-time setting. Lightroom defaults to 16-bit and the AdobeRGB colour space.
The Basics panel (the first tab) allows you to fix Exposure and White Balance. For the latter, use the White Balance Tool (the eyedropper, keyboard shortcut I) to click on an area that should be neutral in colour.
You can adjust Contrast, and recover details in the Highlights and Shadows (turn the latter up to show details in starlit landscapes). Clarity and Vibrance improves midrange contrast and colour intensity.
Use Command/Control Z to Undo, or double click on a slider to snap it back to zero. Or under the pull-down menu in the Presets tab go to Camera Raw Defaults to set all back to zero.
–
Step 3 โย Adobe Camera Raw or Lightroom โย Detail
The Detail panel allows you to set the noise reduction and sharpness as you like it, one of the benefits of shooting Raw.
Generally, settings of Sharpness: Amount 25, Radius 1 work well. Turn up Masking while holding the Option/Alt key to see what areas will be sharpened (they appear in white). Thereโs no need to sharpen blank, noisy sky, just the edge detail.
Setting Noise Reduction: Luminance to 30 to 50 and Color to 25, with others sliders left to their defaults works well for all but the noisiest of images. Luminance affects the overall graininess of the image. Color, also called chrominance, affects the coloured speckling. Turning the latter up too high wipes out star colours.
Turn up Color Smoothness, however, if the image has lots of large scale colour blotchiness.
Zoom in to at least 100% to see the effect of all noise reduction settings. Adobe Camera Raw and Lightroom have the best noise reduction in the business. Without it your images will be far noisier than they need to be.
–
Step 4 โย Adobe Camera Raw or Lightroom โย Lens Correction
Wide angle lenses, especially when used at fast apertures, suffer a lot from light falloff at the corners (called vignetting). Thereโs no need to have photos looking as if they were taken through a dark tunnel.
ACR orย Lightroom can automatically detect what lens you used and apply a lens correction to brighten the corners, plus correct for other flaws such as chromatic aberration and lens distortion.
Use the Color tab to โRemove Chromatic Aberrationโ and dial up the Defringe sliders.
For lenses not in the database (manual lenses like the Rokinons and Samyangs will not be included, nor will any telescopes) use the Manual tab to dial in your own vignetting correction. This can take some trial-and-error to get right, but once you have it, save it as a Preset to apply in future to all photos from that lens or telescope.
I usually apply Lens Corrections as a first step, but sometimes find I have to back it off it as I boost the contrast under Basics.
–
Step 5 โ Bridge or Lightroom โ Copy & Paste
For a small number of images you could open them all, then Select All in ACR to apply the same settings to all images at the same time.
Or you can adjust one, then Select All and hit Synchronize.
Another method useful for processing dozens or hundreds of frames from a star trail or time-lapse set is to choose one representative image and process it. Then in Bridge choose Edit>Develop Settings>Copy Camera Raw Settings. If you are in Lightroomโs Library module, choose Photo>Develop Settings>Copy Settings.
With either program you can also right-click on an image to get to the same choices. Then select all the other images in the set (Command/Control A) and use the same menus to Paste Settings.
A dialog box comes up for choosing what settings you wish to transfer.
If you cropped the image (a good idea for images destined for an HD movie with a 16:9 aspect ratio), pick that option as well. In moments all your images get processed with identical settings. Nice!
–
Step 6 โ Lightroom or Photoshop โ Export
You now have a set of developed Raw images. However, the actual Raw files are never altered. They remain raw!
Instead, with Adobe Camera Raw the information on how you processed the images is stored in the โsidecarโ XMP text files that live in the same folder as the Raw files.
In Lightroomโs case your settings are stored in its own database, unless you choose Metadata>Save Metadata to File (Command/Control S). In that case, Lightroom also writes the changes to the same XMP sidecar files.
To convert the images into final Photoshop PSDs, TIFFs or JPGs you have a couple of choices. In Lightroom go to the Library module and choose Export. It’s an easy way to export and convert hundreds of images, perhaps into a folder of smaller JPGs needed for assembling a time-lapse movie.
To do that from withinย Adobe Bridge, select the images, then go to Tools>Photoshop>Image Processor. The dialogue box allows you to choose how and where to export the images. Photoshop then opens, processes, and exports each image.
–
Step 7 โ Photoshop โ Smart Filters
For a folder of images intended to be stacked into star trails (Step 10A) or time-lapse movies (Step 10B), youโre done processing.
But individual nightscape images can often benefit from more advanced work in Photoshop. The next steps make use of a non-destructive workflow, allowing you to alter settings at any time after the fact. At no time do we actually change pixels.
One secret to doing that is to open an image in Photoshop and then select Layer>Smart Objects>Convert to Smart Object. Or go to Filter>Convert for Smart Filters.
OR … better yet, back in Adobe Camera Raw hold downย the Shift key while clickingย the Open Image button, so it becomes Open Object. That image will then open in Photoshop already as a Smart Object, which you can re-open and re-edit in ACR at any time later should you wish.
Either way, with the image as a Smart Object, you can now apply useful filters such as Reduce Noise, Smart Sharpen, and Dust & Scratches, plus third-party filters such as Nik Softwareโs Dfine 2 Noise Reduction, all non-destructively as โsmart filters.โย They can be re-adjustedย or turned off at any time.
–
Step 8 โ Photoshop โ Adjustment Layers
The other secret to non-destructive processing is to apply adjustment layers.
Go to Layer>New Adjustment Layer, or click on any of the icons in the Adjustments panel. If that panel is not visible at right, then under the Window menu check โAdjustments.โ
This panel is where you can alter the colour balance, the brightness and contrast, the vibrancy, and many other choices. I find Selective Color most useful for tweaking colour.
Curves allows you to bring up detail in dark areas. Levels allows setting the black and white points, and overall contrast.
The beauty of adjustment layers is that you can click on the layerโs little icon and bring up the dialog box for changing the setting at any time. You never permanently alter pixels.
The image adjustment โShadows & Highlightsโ is also immensely useful, but appears as a smart filter, not as an adjustment layer. It’s one of the prime tools for creating images with great detail in scenes lit only by starlight.
–
Step 9 โ Photoshop โ Masks
The power of adjustment layers is that you can apply them to just portions of an image. This is useful in nightscapes where the sky and ground often need different processing.
To create a mask first select the region you want to work on. Try the Quick Selection Tool (found near the top of the Tool palette at left). Use it to brush across the sky, or the ground, so that the entire area is outlined by โmarching ants.โ
Use the Refine Edge option to tweak the selection by brushing across intricate areas such as tree branches.
Once you have an area selected, hit one of the Adjustments to add an adjustment layer with the mask automatically applied. Double click on the mask to tweak it: hit Mask Edge to clean up the edge, or turn up the Feather to blur the edge.
To apply the same mask to another adjustment layer, drag the mask from one layer to another while holding down the Option/Alt key.
Invert the mask (or select it and hit Command/Control I) to apply it to the other half of the image. Paint the mask with black or white brushes if you need manually alterย it. Remember โ black โconceals,โ while white โreveals.โ
When done, be sure to always save the image as a layered “master” .PSD file.
Never, ever flatten and save โ that will wipe out all your non-destructive filters and adjustment layers.
If you need to save the image as a JPG for social mediia or emailing, then Flatten and Save As … ย Or use Photoshop’s File>Export>Export As .. function.
–
Stars setting in trails over the Athabasca Glacier and Columbia Icefields, Sept 14, 2014. The Milky Way is trailed at right.ย This is a stack of 100 exposures, composited with Advanced Stacker Plus actions in Photoshop, with the ground coming from a subset stack of 8 images to reduce noise. Each exposure, taken as part of a time-lapse sequence, was 45 seconds at f/2.8 with the 16-35mm lens at 23mm and Canon 6D at ISO 4000.
Step 10A โ Photoshop or 3rd Party Programs โ Stack for Star Trailsย
One popular way to shoot images of stars trailing in arcs across the sky is to shoot dozens or hundreds of well-exposed frames at a fairly high ISO and wide aperture, and at a shutter speed no longer than 30 to 60 seconds. You then โstackโ the images to create the equivalent of one frame shot for many minutes, if not an hour or more. The image above is an example.
There are several ways to stack.
From within Photoshop CC (or using anย Extended version of the older CS5 or CS6) one method is to go to File>Scripts>Statistics. In the dialog box, drill down to the images you wish to stack (put them all in one folder) and choose Stack Mode: Maximum, and uncheck โAttempt to Automatically Align.โ The result is a huge (!) smart object. This method works best on just a few dozen images. In this case, you’ll need to use Layers>Flatten to reduce its size.
Other options for stacking hundreds of images include the free program StarStax (Windows and Mac), which requires a folder of “intermediate” TIFFs or JPGs. See Step 6 above.
The Advanced Stacker Actionsfrom Star Circle Academy are actions you install in Photoshop that work directly from Raw files to create some impressive effects. I use them and recommend them.
–
Step 10B โ Photoshop or 3rd Party Programs โ Assemble for Movies
The same folder of images taken for star trail stacking can also be turned into a time-lapse movie. Instead of stacking the images on top of one another in space, you string them together one after the other in time.
There are many methods for assembling movies. Free or low cost programs such as Quicktime 7 Pro, Time-Lapse Assembler, Sequence (a Mac program shown above), VirtualDub, or Time-Lapse Tool can do the job, all offering options for the final movieโs format.
Generally, an HD video of 1920×1080 pixels in the H264 format, or โcodec,โ is best, rendered at 15 to 30 frames per second.
Most movie assembly programs will need to work from a folder of JPGs of the right size, produced using one of the choices listed under Step 6: Export.
But … you can also use Photoshop to assemble a movie.
Choose the Window>Workspace>Motion to bring up a video timeline. Then File>Open to drill to your folder of processed and down-sized JPG files. Select one image, then check โImage Sequence.” Choose the frame rate (15 to 30 fps is best). Then go to File>Export>Render Video to turn the resulting file into a final H264 or Quicktime movie suitable for use in other movie editing programs.
–
Advanced Techniques: Using LRTimelapse
The workflow Iโve outlined works great when you can apply the same development settings to all the images in a folder. For star trail and time-lapse sequences shot once it gets dark and under similar lighting conditions that will be the case.
But if the Moon rises or sets during the shoot, or if you are taking a much more demanding sequence that runs from sunset to night, the same settings wonโt work for all frames.
The answer is to turn to the program LRTimelapseย (100 Euros for the standard version, and available in a free but limited trial copy). LRTimelapse works with either Lightroom or Bridge/Adobe Camera Raw.
To use it you process just a few selected โkeyframesโ โ at least two, at the start and end of the sequence, and perhaps other frames throughout the sequence, processing them so each frame looks great. You read that processing data into LRTimelapse and, like magic, it interpolates your settings, creating a folder of images with every setting changing incrementally from frame to frame, something you could never do by hand.
It can then work with Lightroom to export the frames out to a video in formats from HD up to 4K in size. For serious time-lapse work, LRTimelapse is an essential tool.
–
Much, much more information and tutorials are included in my multimedia Apple eBook, linked to below.
But I hope this quick tutorial helps in providing you with tips to make your images and movies even better! If you found it useful, please feel free to share a link to this blog page through your social media channels. Thanks!
The waning crescent Moon joined the planet trio this morning for a fine sight in the dawn.
This was the scene on November 6 with the waning crescent Moon just below Jupiter, and those two worlds just above the pairing of bright Venus with dim red Mars.
On Saturday, November 7, the waning Moon will sit beside Venus for an even more striking conjunction.
The waning crescent Moon below Jupiter, with that pair of worlds above the pairing of Venus (bright) and red Mars (just above Venus), all in the dawn sky in Leo, November 6, 2015. The stars of Leo are above, including Regulus. This is a composite of 4 exposures: 15 seconds for the ground (to bring out detail there), 4 seconds for the sky (short enough to prevent star trailing), and 1 and 1/4 seconds for the Moon itself to prevent it from being totally blown out as a bright blob. All with the Nikon D750 at ISO 2000 and Sigma 24mm Art lens at f/4.5. Taken from home.
This meeting of the Moon with the planet trio more or less concludes the superb series of dawn sky conjunctions we’ve been enjoying over the last month.
The planets remain in the morning sky but now go their own ways as Mars and Jupiter climb higher, while Venus drops lower.
The gathering of planets at dawn is coming to an end as Venus meets Mars.
This was the view this morning from home in southern Alberta of the trio of planets in the moonlit morning sky.
Venus is the brightest, while dim red Mars shines just to the left of Venus. Jupiter is above the Venus & Mars pairing, with all the planets shining in Leo.
Mars and Venus will appearย closest to each other on November 2 and 3. Then the group breaks apart as Venus descends but Mars and Jupiter climb higher.
But as they do so they are joined by the waning Moon, by then a thin crescent, on November 6, when the Moon shines near Jupiter, and November 7, when it joins Venus for a stunningย dawn sky scene.
After that the morning planet dance comes to an end. But in two months, in early January, Venus will meet up with Saturn for a very close conjunction inย the winterย dawn sky on January 9.
Skies were clearย at dawn this morning for a fabulous view of the rare conjunction of three planets. And I could not have been at a more photogenic site.
This was the view before dawn on October 25, as brilliant Venus and dimmer Jupiter shone just a degree apart in the dawn sky. Mars, much fainter, shines just below the close duo. The three planets could easily be contained in a high power binocular field.
Not until November 2111 will these three planets be this close together again in a darkened sky.
Indeed, Venus could not have been higher, as it is just now reaching its maximum elongation from the Sun, placing it high in the eastern morning sky.
I shot from the shores of Lake Annette, site of one of the major events, the Friday star party, at the annual Jasper Dark Sky Festival which just concluded, in Jasper National Park, Alberta. The Festival celebrates the Park’s status as one of the world’s largest Dark Sky Preserves.
The hotels and restaurants were full with stargazers from around the world, making the Festival a huge success, both educationally and financially. I was honoured to be able to present some of the public and school talks.
But this dawn skyย was a fine way to end a fabulous weekend of astronomy.
The image above is a panorama in the twilight, sweeping from the planets in the east, to the winter stars and constellations, including iconic Orion, in the south and southwest.
Earlier in the morning, before twilight began to brighten the sky, I shot another even wider panorama from the south shore of the lake.
In this and other photos, high haze adds the glows around the stars and planets naturally. No special effects filters here!
But Venus and Jupiter are so close and bright theirย images almost merge into one glow.
Here they are, with Mars below, shining in the dark sky over the Watchtower peak and over the misty waters of Lake Annette.
Keep an eye on the sky at dawn, as these three worlds will be close to each other for the next few mornings. See my earlier blog for details.
Here are my top tips for shootingย terrificย still-image nightscapes … and time-lapse movies of the night sky.ย
1. Go for pixel size, not pixel count
When choosing a camera for night sky scenes, the most important characteristic is not number of megapixels. Just the opposite.
The best cameras are usually models with more modest megapixel counts. Each of their individual pixels is larger and so collects more photons in a given exposure time, yielding higher a signal-to-noise ratio โ or lower noise, critical for night shooting.
Cameras with pixels (the โpixel pitchโ) 6 to 8 microns across are best. Many high-megapixel cameras have tiny 4-micron pixels.
Large-pixel cameras are often the full-frame models, such as the Canon 5D MkIII and 6D, the Nikon D610, D750, and Df, and the Sony a7s and a7S II.
Many โcropped-frameโ cameras are now 18- to 24-megapixel models with smaller, noise-prone pixels. They can certainly be used, but will requireย more care in exposing well at lower ISOs, and in processing to smooth out noise without blurring detail.
2. Learn to fly on manual
While DSLRs and Compact System Cameras have amazing automatic functions we use none of them at night.
Instead, we use the camera on Manual or Bulb, dialling in shutter speed, aperture and ISO speed manually. We also have to focus manually, using Live View mode to focus on a bright star or distant light.
Learn the tradeoffs involved: Increasing ISO sensitivity of the sensor keeps exposure times down but increases noise. Opening up the lens aperture to f/2 or f/1.4 also keeps exposures short but introduces image-blurring aberrations, especially at the frame corners.
To prevent stars from trailing due to the skyโs motion adhere to the โ500 Rule:โ the maximum exposure time is roughly 500 divided by the focal length of your lens.
3. Expose to the rightย
At night, always give the sensor plenty of signal.
Use whatever combination of shutter speed, aperture and ISO will provide a well-exposed image. The image โhistogram,โ the graph of number of pixels at each brightness level shown above, should never be slammed to the left.
It should be a well-distributed โmountain rangeโ of pixels, extending well to the right. If the 500 Rule restricts your shutter speed, and your desire for sharp images across the frame demands you shoot at f/2.8 or even slower, then donโt be afraid to bump up the ISO speed to whatever it takes to produce a good histogram and a well-exposed image.
Noise will look far worse if you underexpose, then try to boost the image brightness later in processing. Expose to the right!
4. Shoot Raw!
Shoot Raw. Period.
When comparing Raw and compressed JPG versions of the same image, you can be fooled into thinking the JPGs look better (i.e. smoother) because of the noise reduction the camera has applied to the JPG that is beyond your control. However, that smoothing has also wiped out fine detail, like stars.
By shooting Raw you get to control whatever level of noise reduction and sharpening the image needs later in processing.
JPGs are also 8-bit images with a limited tonal range โย or palette โย in which to record the subtle gradations of brightness and colour present in our images.
Imported Raw files are 16-bit, with a much wider tonal scale and colour palette. Thatโs critical for all astrophotos when, even with a well-exposed image, many tonal values are down in the dark end of the range. Processing Raw images makes it possible to extract detail in the shadows and highlights.
Even when shooting a time-lapse sequence, shoot Raw.
5. Take dark frames (sometimes!)
LENR reduces noise.
Itโs a topic of some debate, but in my experience it is always better to turn on the cameraโs Long Exposure Noise Reduction (LENR) function when shooting individual nightscape images. Doing so forces the camera to take a โdark frame,โ an exposure of equal length but with the shutter closed.
It records just the noise, which the camera then subtracts from the image. Yes, it takes twice as long to acquire an image, but the image is cleaner, with fewer noisy pixels.
This is especially true when shooting on hot summer nights (the warmer the sensor the higher the noise). That said, you cannot use LENR when shooting frames for star trail composites or time-lapse movies.
For those, the interval between images should be no more than 1 to 5 seconds. Using LENR would introduce unsightly gaps in the trails or jumps in the star motion in time-lapses.
As an alternative, it is possible to take separate dark frames at the end of the night by simply covering the lens and taking exposures of the same duration and at the same ISO as your “light frames.”
Some stacking software, such as StarStax and the Advanced Stacker Actions have places to put these dark frames, to subtract them from the stack later in processing.
6. Use fast lenses
A fast lens is your best accessory.
While the โkit zoomโ lenses that come with many DSLRs are great for shooting bright twilight or Full Moon scenes, they will prove too slow for dark starlit scenes with the Milky Way.
In addition to exposing to the right and shooting Raw, the secret to great nightscapes is to shoot with fast lenses, usually โprimeโ lenses with fixed focal lengths. They are usually faster and have better image quality than zooms.
Your most-used lens for nightscape and time-lapse shooting is likely to be a 14mm to 24mm f/2 to f/2.8 lens.
Fortunately, because we donโt need (and indeed canโt use) autofocus we can live happily with low-cost manual lenses, such as the models made in Korea and sold under brands such as Rokinon, Samyang and Bower. They work very well.
7. Get to know the Moon & Milky Way
For many nightscape and time-lapse shoots, the Moon is your light source for illuminating the landscape.
When the Moon is absent, the Milky Way is often your main sky subject.
Knowing where the Moon will be in the sky at its various phases, and when it will rise (in its waning phases after Full Moon) or set (in its waxing phases before Full) helps you a plan a shoot, so youโll know whether a landscape will be well lit.
Astronomy apps for desktop computers and mobile devices are essential planning aids. A good one specifically for photographers is The Photographer’s Ephemeris.
Knowing in what season and time of night the Milky Way will be visible is essential if you want to capture it. Donโt try for Milky Way shots in spring โ it isn’t up!
8. Keep it simple to start
Don’t be seduced by the fancy gear.ย
Time-lapse imaging has blossomed into a field replete with incredible gear for moving a camera incrementally during a shoot, and for automating a shoot as day turns to night.
I explain how to use all the fancy gear in my ebook, linked to below, however … Great time-lapses, and certainly still-frame nightscapes, can be taken with no more than a DSLR camera with a good fast lens and mounted on a sturdy tripod. Invest in the lens and donโt scrimp on the tripod.
Another essential for shooting multi-frame star trails and time-lapses is a hardware intervalometer ($50 to $150).
9. Learn the intricacies of intervals
For time-lapses, an intervalometer is essential.
Mastering exposure and focus in still images is essential for great time-lapse movies because they are simply made of hundreds of well-exposed still frames.
But move to time-lapses and you have additional factors to consider: how many frames to shoot and how often to shoot them. A good rule of thumb is to shoot 200ย to 300 frames per sequence, shot with an interval of no more than 1 to 5 seconds between exposures, at least for starry night sequences.
However, most intervalometers (the Canon TC-80N3 is an exception) define their โIntervalโ setting to mean the time from when the shutter opens to when it opens again. In that case, you set the Interval to be a value 1 to 5 seconds longer than the exposure time you are using. That’s also true of theย intervalometer function Nikon builds into their internal camera firmware.
Test first!
10. Go to beautiful places
While the gear can be simple, great shots demandย anย investment in time.
By all means practice at home and at nearby sites that are quick to get to. Try out gear and techniques at Full Moon when exposures are short (the Full Moon is bright!) and you can see what you are doing.
But beautiful images of landscapes lit by moonlight or starlight require you to travel to beautiful locations.
When you are on site, take the time to frame the scene well, just as you would during the day. Darkness is no excuse for poor composition!
While shooting nightscapes and time-lapses can be done with a minimal investment in hardware and software, it does require an investment in time โ time to travel and spend nights shooting at wonderful places under the stars.
Enjoy the night!
I cover all these topics, and much more, in detail in my ebook How to Photograph & Process Nightscapes and Time-Lapses. Click the link below to learn more.
The Northern Lights dance over the badlands of Dinosaur Provincial Park, a World Heritage Site.
Aurora alerts called for a fine display on Friday, September 11. Forewarned, I headed to one of my favourite shooting spots at Dinosaur Provincial Park, and aimed three cameras at the sky. It didn’t take long before the lights appeared, right on cue.
The display started out with lots of promise, but did fade after 12:30 a.m., just when it was supposed to be peaking in intensity. I let the cameras run for a while but eventually stopped the shutters and packed it in…
…But not before I captured this odd bit of aurora in the east, shown below, that appearedย as an isolated and stationary band pulsing up and down in brightness, but with little movement.
I’ve seen these before and have never heardย a good explanation of what process creates such an effect, with a patch of sky appearing to “turn on” and off.
You can see the effect at the end of the time-lapse compilation, linked below from Vimeo.
As usual, please enlarge to full-screen and watch in HD for the best quality.
Unfortunately, a patrolling park official checking on things, spoiled some frames with her truck’sย headlights. It’s one of the hazards of time-lapse imaging.
As a final image, here are all the fish-eye lens framesย stacked into one image, to create a single star trail showing the sky rotating about the celestial pole.
Each exposure was 20 seconds at f/3.5 with the Sigma 8mm lens and at ISO 6400 with the Canon 6D. The ground comes from a stack of 16 images taken early in the sequence turned into a smart object and mean combined with Mean stack mode, to average out and smooth noise. The sky comes from 198 exposures, Lighten stacked using the Advanced Stacker Actions from StarCircleAcademy.com.
It’s been a good week for auroras, with a promise of more to come perhaps, as we approach equinox, traditionally a good time for magnetic field lines to align, funnellingย solar storm particles into our magnetosphere.
I’ve been an avowed Canon DSLR user for a decade. I may be ready to switch!
[NOTE:This review dates from 2015. Tests done today with current models would certainly differ. Canon’s EOS R mirrorless series, for example, offer much better ISO Invariancy performance but lack the “dark frame buffer” advantage of Canon DSLRs. And indeed, I have used the Nikon D750 a lot since 2015. But I did not give up my Canons!]
Here, in a technical blog, I present my tests of two leading contenders for the best DSLR camera for nightscape and astronomical photography: the Canon 6D vs. the Nikon D750. Which is better?
To answer, I subjected both to side-by-sideย outdoor tests, using exposures you’ll actually use in the field for typical nightscapes and for deep-sky images.
Both cameras are stock, off-the-shelf models. They haveย notย had their filters modified for astronomy use.ย Both are 20- to 24-megapixel, full-frame cameras, roughly competitive in price ($1,900 to $2,300).
For images shot through lenses, I used the Canon L-Series 24mm on the Canon 6D, and the Sigma 24mm Art lens on the Nikon D750.
The bottom line:ย Both are great cameras, with the Nikon D750 having the edge for nightscape work, and the Canon 6D the edge for deep-sky exposures.
NOTE: Click on the test images for higher-resolution versions for closer inspection. All images and text ยฉ 2015 Alan Dyer and may not be reproduced without my permission.
TEST #1 โ Noise
The 24.3-megapixel Nikon D750 has 5.9-micron pixels, while the 20.2-megapixel Canon 6D has slightly larger 6.5-micron pixels which, in theory, should lead to lower noise for the Canon. How do they compare in practice?
The scene used to test for noise (here with the Nikon images) showing the development settings applied to both the Nikon and Canon sets. NO noise reduction (colour or lunminance) was applied to any of the images, but Exposure, Shadows, Contrast and Clarity were boosted, and Highlights reduced.
I shot aย moonlit nightscape scene (above) at five ISO settings, from 800 to 12800, at increasingly shorter exposures to yield identically exposed frames. I processed each frame as shown above, with boosts to shadows, clarity, and contrast typical for nightscapes. However, I applied no noise reduction (either luminance or color) in processing. Nor did I take and apply dark frames.
The blowups of aย small section of the frame (outlined in the box in the upperย right of the Photoshop screen) show very similar levels of luminance noise. The Canon shows slightly more color noise, in particular more magenta pixels in the shadows at high ISOs. Its larger pixels didn’t provide the expected noise benefit.
TEST #2 โ Resolution
Much has been written about the merits of Canonย vs. Nikon re: the most rigorous of tests, resolving stars down at the pixel level.
I shot the images below of the Andromeda Galaxy the same night through a 92mm aperture apo refractor. They have had minimal but equal levels of processing applied. At this level of inspection the cameras look identical.
But what if we zoom in?
For many years Nikon DSLRs had a reputation for not being a suitable for stellar photography because of a built-in noise smoothing that affected even Raw files, eliminating tiny stars along with noise. Raw files weren’t raw. Owners worked around this by turning on Long Exposure Noise Reduction, then when LENR kicked in after an exposure, they would manually turn off the camera power.
This so-called “Mode 3” operation yielded a raw frame without the noise smoothing applied. Clearly, this clumsy workaround made it impossible to automate the acquisition of raw image sequences with Nikons.
Are Nikons still handicapped? In examining deep-sky images at the pixel-peeping level (below), I saw absolutely no difference in resolution or the ability to record tiny and faint stars. With its 4-megapixel advantage the Nikon should resolve finer details and smaller stars, but in practice I saw little difference.
Closeup of telescope view of Andromeda Galaxy with Canon 6D 4 minute exposure at ISO 800 No noise reduction applied in processing
Closeup of telescope view of Andromeda Galaxy with Nikon D750 4 minute exposure at ISO 800 No noise reduction applied in processing
On the other hand I saw no evidence for Nikon’s “star eater” reputation. I think it is time to lay this bugbear of Nikons to rest. The Nikon D750 proved to beย just as sharp as the Canon 6D.
Note that in the closeups above, the red area marks a highlight (the galaxy core) that is overexposed and clipped. Nikon DSLRs also have a reputation for having sensors with a larger dynamic range than Canon, allowing better recording of highlights before clipping sets in.
However, in practice I saw very little difference in dynamic range between the two cameras. Both clipped at the same points and to the same degree.
TEST #3 โ Mirror Box Shadowing
An issue little known outside of astrophotography is that a DSLR’s deeply-inset sensor can be shadowed by the upraised mirror and sides of the mirror box. Less light falls on the edges of the sensor.
The vignetting effect is noticeable only when we boost the contrast to the high degree demanded by deep-sky images, and when shooting through fast telescope systems.
Here I show the vignetting of the Canon and Nikon when shooting through my 92mm refractor at f/4.5.
The circular corner vignetting visible in the images below is from the field flattener/reducer I employed on the telescope. It can be compensated for by using Lens Correction in Adobe Camera Raw, or eliminated by taking flat fields.
Demonstrating the level of vignetting and mirror-box shadowing with the Canon 6D on a TMB 92mm apo refractor with a 0.85x field flattener/reducer lens
Demonstrating the level of vignetting and mirror-box shadowing with the Nikon D750 on a TMB 92mm apo refractor with a 0.85x field flattener/reducer lens
The dark edge at the bottom of the frame is from shadowing by the upraised mirror. It can be eliminated only by taking flat fields, or reduced by using masked brightness adjustments in processing.
Both cameras showed similar levels of vignetting, with the Canon perhaps having the slight edge.
TEST #4 โ ISO Invariancy
So far the Nikon D750 and Canon 6D are coming up fairly equal in performance. But not here. This is where the Nikon outperformsย the Canon by quite a wide margin.
Sony sensors (used in Sony cameras and also used by Nikon) have a reputation for being “ISO Invariant.”
What does that mean?
A typical Milky Way nightscape with the Nikon D750 and Sigma 24mm Art lens. With no Moon, shot at very high ISO of 6400 and wide aperture of f/1.4 to show image quality under these demanding shooting circumstances. Lens correction and basic development setttings applied.
A typical Milky Way nightscape with the Canon 6D and Canon 24mm L lens (original model). With no Moon, shot at very high ISO of 6400 and wide aperture of f/1.4 to show image quality under these demanding shooting circumstances. Lens correction and basic development setttings applied.
In the examples above, the correct exposure for the starlit scene was 15 seconds at f/1.4 at ISO 6400. See how the two cameras rendered the scene? Very similar, albeit with the Canon showing more noise and discoloration in the dark frame corners.
What if we shoot at the same 15 seconds at f/1.4 … but at ISO 3200, 1600, 800, and 400? These are now 1-, 2-, 3-, and 4-stops underexposed, respectively.
Then we boost the Exposure setting of the underexposed Raw files later in processing, by 1, 2, 3 or 4 f-stops. What do we see?
Nikon D750 – Comparing ISO Invariancy from ISO 6400 to 400 (Nightscape)
With the Nikon (above) we see images that look nearly identical for noise to what we got with the properly exposed ISO 6400 original. It really didn’t matter what ISO speed the image was shot at โย we can turn it into any ISO we want later with little penalty.
Canon 6D – Comparing ISO Invariancy from ISO 6400 to 400 (Nightscape)
With the Canon (above) we get images with grossly worse noise in the shadows and with ugly magenta discoloration. Canons cannot be underexposed. You must use as high an ISO as needed for the correct exposure.
This “ISO Invariant” advantage of Nikon over Canon is especially noticeable in nightscapes scenes lit only by starlight, as above. The Canon turns ugly purple at -3EV underexposure, and loses all detail and contrast at -4EV underexposure.
For nightscape imaging this is an important consideration. We are limited in exposure time and aperture, and so are often working at the ragged edge of exposure. Dark areas of a scene are often underexposed and prone to noise. With the Nikon D750 these areas may still look noisy, but not much more so than they would be at that ISO speed.
With the Canon 6D, underexpose the shadows and you pay the price of increased noise and discoloration when you try to recover details in the shadows.
Apparently, the difference comes from where the manufacturer places the analog-to-digital circuitry: on the sensor (ISO invariant) or outboard on a separate circuit (ISO variant), and thus where in the signal path the amplification occurs when we boost ISO speed.
TEST #6 โ Features
One could go on endlessly about features, but here I compare the two cameras on just a few key operating features very important to astrophotographers.
Intervalometer:
The Canon 6D has none, though newer Canons do. The Nikon D750, as do many Nikons, has a built-in intervalometer (shown above), even with a deflickering “Exposure Smoothing” option. However, exposure time is limited to the camera’s maximum of 30 seconds. Any longer requires an outboard intervalometer, as with the Canon.
If you use your camera with any motion control time-lapse unit, then it becomes the intervalometer, negating any capability built into the camera. But it’s nice to have.
Small Advantage: Nikon
Interval Length:
REVISED JUNE 2020:
When taking time-lapse or star trail images with the Canon I can set an interval as short as 1 second between frames, for a minimum of gaps or jumps in the stars. With the Nikon, controlled internally by its built-in intervalometer, a 1-second interval is possible but only if you set the interval to 33 seconds for a 30-second shutter speed.
That’s true of Canon and Sony built-in intervalometers as well, because on all cameras setting the exposure to 30 seconds really gives you a 32-second exposure. A little known fact! So the interval between shutter firings has to be set to 33 seconds. It’s tricky.
Advantage: None to either
Tiltable LCD Screen:
The Canon 6D has none. The Nikon D750 has a very useful tilt-out screen as shown above. This is hugely convenient for all forms of astrophotography. Only cropped-frame Canons have tilt-out screens. This feature might add weight, but it’s worth it!
Big Advantage: Nikon
Dark Frame Buffer:
The Nikon has none. With Long Exposure Noise Reduction ON, the Canon 6D allows up to four exposures to be shot in quick succession before the dark frame kicks in and locks up the camera. (Put the camera into Raw+JPG.)
[JUNE 2020: With the Canon 6D MkII the buffer allows three frames to be taken in quick succession.]
This is very useful for deep-sky imaging, for acquiring a set of images for stacking that have each had a dark frame subtracted in-camera, with a minimum of “down-time” at the camera.
Big Advantage: Canon
Live View Screen Brightness:
As pointed out to me by colleague Christoph Malin, with the Nikon you cannot dim the screen when in Live View mode and with Exposure Simulation ON. So it can be too bright at night. With the Canon you can dim the Live View screen โ the LCD Brightness control affects the screen both during Live View as well as duringย playback of images.
Small Advantage: Canon
Software Compatibility:
Canon EOS cameras are well supported by advanced software, such as GBTimelapse (above) that controls only Canons, not Nikons, in complex time-lapse sequences, and Nebulosity, popular among deep-sky imagers for DSLR control.
Small Advantage: Canon
Myย take-away conclusions:ย
โข Nikon DSLRs now are just as good for astrophotography as Canons, though that wasn’t always the case โย early models did suffer from more noise and image artifacts than their Canon counterparts.
โข Canon DSLRs, due to their sensor design, are more prone to exhibiting noise and image artifacts when images are greatly underexposed then boosted later in processing. Just don’t underexpose them – good advice for any camera.
All images and text are ยฉ 2015 Alan Dyer.
โ Alan, August 27, 2015 & Revised June 25, 2020 / ยฉ 2015 Alan Dyer / www.amazingsky.com
I present a short time-lapse vignette of scenes shot under moonlight on the Alberta prairie.
The movie linked below features sequences shot July 29 and 30, 2015 on beautifully clear moonlit nights at locations south of Bow Island, Alberta, on the wide open prairie. The three-minute video features two photogenic pioneer sites.
The church is the now derelict St. Anthony’s Church, a former Roman Catholic church built in 1911 by English and Russian-German immigrants. It served a dwindling congregation until as late as 1991 when it closed. At that time workers found a time capsule from 1915 with names of the priest and parisioners of the day.
The wood churchย seems to have been largely neglected since.
In the summer of 2014 the Church suffered its latest indignity when the iron cross on its steeple tower was stolen. I also shot in the pioneer cemetery of the Church.
The other site is a nearby farmhouse with photogenic textures and accompanied by rustic out buildings that are barely managing to stand.
Illumination was from a waxing gibbous Moon, just 1 to 2 days before the infamous “Blue Moon” of July 31. Its bright light turned the sky blue, and lit the landscape with the same quality as sunlight, because it is sunlight!
Enlarge the video to full screen for the full HD version.
For theย technically inclined:
I shot the scenes with three cameras โ a Canon 60Da, Canon 6D, and Nikon D750.
The Nikon, with a 24mm lens, was on the Dynamic Perception Stage Zero Dolly and Stage R panning unit, while the 60Da, with a 14mm lens, was on the compact Radian panning unit. The third camera, the 6D, with a 16-35mm lens, was on a fixed tripod for the star trail sequences and stills.
The music is by Adi Goldstein (AGSoundtrax.com), whose music I often use in my sequences. It just seems to work so well, and is wonderfully melodic and powerful. Thank you, Adi!
To process the several thousand frames that went into the final movie, I used Adobe Bridge and Adobe Camera Raw, supplemented by the latest Version 4.2 of LRTimelapse (lrtimelapse.com). Its new “Visual Deflicker” workflow does a beautiful job smoothing out frame-to-frame flickering in sequences shot in twilight under darkening lighting conditions. Thank you Gunther!
For the star trail sequences and the still images above I used the Advanced Stacker Actions fromย StarCircleAcademy.com. Unlike most other stacking programs, the Stacker Actions work from within Adobe Bridge and Photoshop directly, using the processed Raw images, with no need to create intermediate sets of JPGs. Thank you Steven!
The summer Milky Way shines over the Milk River and the sandstone formations of Writing-on-Stone Provincial Park.
Earlier this week I spent two nights shooting at a favourite site in southern Alberta, near the U.S. border. Here, the Milk River windsย through a small canyon and coulees lined with eroded sandstone formations called hoodoos. Carved on those hoodoos are ancient graffiti โ petroglyphs dating back hundreds of years recording life on the plains. Thus the name: Writing-on-Stone.
It’s a beautiful place, especially so at night. I was there to shoot video scenes for an upcoming “How to Photograph the Milky Way” tutorial. And to collect images for the tutorial.
Above is a shot that is one frame from a time-lapse sequence, one that captures a meteor and the Milky Way over the Milk River, with the Sweetgrass Hills of Montana in the distance.
This image is from a set of exposures I took with the camera and ultra-wide 15mm lens tracking the turning sky, to prevent the stars from trailing in long exposures. A set of images with the tracker motor turned off supplied the sharp ground.
It shows the sweep of the summer Milky Way, with some clouds and forest fire smokeย intruding to the south.
In both images the ground is green because, in part, it is being lit by an aurora display going on behind the camera to the north.
Here’s the view looking east, with aย green aurora fringed with red lighting the northern sky.
The display on the night of July 22/23 formed a classic arc across the north. This was my panoramic view of the vast auroral oval that was wrapping around the planet at far northern latitudes. Here, I was at 49ยฐ north, almost on the Canada-U.S. border, and well south of the main oval.
In all, it was a magical two nights at a scenic and sacred site.
Mountain scenes take on a new look when photographed by moonlight.
Last week I spent four wonderful nights shooting the landscapes of Waterton Lakes National Park under the light of the waxing Moon. For two of the evenings I taughtย small groups of photographers eager to learn how to extend their photo skills into the night.
We shot at Red Rock Canyon both nights, an ideal spot for its many composition options for shooting both toward and away from the Moon.
The leadย image is a view looking up the canyon, with Cassiopeia in view. Always nice to have a recognizable constellation so well positioned.
The image just above looks toward the Moon, partly hidden by colourful clouds diffracting the moonlight. A student is at left trying out a composition.
Here, students, silhouetted by the Moon, use the footbridge as their vantage point to photograph moonlight on the canyon waters and walls.
My workshops were part of the annual Waterton Wildflower Festival. So, a number of us tried to shoot flowers by moonlight, no easy task considering the wide apertures and shallow depth of field usually required, even under bright moonlight.
But the photo above is my take on summer alpine flowers in a meadow with the iconic Anderson Peak in the distance.
Three nights were wonderfully clear. But my first night, set aside for scouting locations for the Workshops, was beset by some clouds. However, I made use of them to create a moody moonlit cloudscape panorama of the Big Dipper over Blakiston Valley.
I’ll be back in Waterton in September for the Wildlife Festival. We won’t try to shoot bears by moonlight! One did wander by at the start of ourย Saturday Workshop!
Instead, we’ll concentrate on photographing the Milky Way. That’s Friday, September 18.
The stars circle the bright northern sky at solstice time over the Alberta Badlands.
I spent the evening and well into the night on Monday shooting at a favourite spot, Dinosaur Provincial Park in southern Alberta. The result of about an hour of shooting around midnight is the circumpolar star trail composite at top.
It shows the stars spinning about Polaris, while the northern horizon is rimmed with the bright glow of all-night twilight.
Particularly bright in the northwest are noctilucent clouds low on the horizon. These are high-altitude clouds near the edge of space catching the sunlight streaming over the pole at this time of year.
They are a phenomenon unique to the weeks around solstice, and for our latitudes on the Canadian Prairies.
The close-up shot above shows their intricate wave-like formation and pearly colour. They faded though the night as the Sun set for the clouds. But they returned in the pre-dawn light.
If you live at mid-northern latitudes, keep an eye out for these clouds of solstice over the next month. It’s now their peak season.
Each night, Venus and Jupiter are converging closer, heading toward conjunction on June 30.
This was Venus (right) and Jupiter (centre) with Regulus at left, in a cloudy twilight sky on Friday, June 12, as Venus and Jupiter converge toward their close conjunction in the evening sky on June 30.
Be sure to watch each night as the two brightest planets in the sky creep closer and closer together. Mark June 19 and 20 on your calendar, as that’s when the waxing crescent Moon will join the duo.
I shot this from near Vulcan, Alberta, after delivering an evening program at the Trek Centre in Vulcan as a guest speaker. Clouds prevented us from seeing anything in the sky at the public event, but on my way home skies cleared enough to reveal the two bright planets in the twilight.
I stopped at an abandoned farmyard I had scouted out earlier in the evening, to serve as a photogenic backdrop.
This is a high dynamic range stack of three bracketed exposures, one stop apart, to record detail in both the dark foreground as well as in the bright sky.
The waxing Moon and Venus shine over contrasting landscapes, both urban and rural.
I shot theย main image at top last night, May 21, from a site overlooking the urban skyline of Calgary, Alberta. The waxing Moon shines near Venus in the twilight sky.
By contrast I shot the image below the night before, from a location that couldn’t be more different โ remote, rural Saskatchewan, on a heritage farmstead first settled in the 1920s by the Butala family. It is now the Old Man on His Back Prairie and Heritage Conservation Area.
Here, the crescentย Moon shines a little lower, below Venus, amid the subtle colours of twilight in a crystal clear prairie sky.
However, as the top image demonstrates, you don’t need to travel to remote rural locations to see and photograph beautiful sky sights. Twilight conjunctions of the Moon and bright planets lend themselves to urban nightscapes.
The stars at night shineย big andย bright, deep in the heart of Texas.
Last week several hundred stargazers gathered under the dark skies of West Texas to revel in the wonders of the night sky. I was able to attend the annual Texas Star Party, a legendary event and a mecca for amateur astronomers held at the Prude Ranch near Fort Davis, Texas.
Some nights were plagued by clouds and thunderstorms. but here are some scenes from a clear night, with several hundred avid observers under the stars and Milky Way. Many stargazers usedย giant Dobsonian reflector telescopes to explore the faintest of deep-sky objects in and beyond the Milky Way.
A 360ยฐ panorama of the upper field of the Texas Star Party at the Prde Ranch near Fort Davis, TX, May 13, 2015, taken once the sky got astronomically dark. The panorama shows the field of telescopes and observers enjoying a night of deep-sky viewing and imaging. Venus is the bright object at right of centre and Jupiter is above it. The Zodiacal Light stretches up from the horizon and continues left across the sky in the Zodiacal Band to brighten in the east (left of centre) as the Gegeneschein. I shot this with a 14mm lens, oriented vertically, with each segment 60 seconds at f/2.8 and with the Canon 5D MkII at ISO 3200. The panorama is made of 8 segements at 45ยฐ spacings. The segments were stitched with PTGui software.
Observers at the Texas Star Party explore the wonders of the deep sky under the rising Milky Way, in May 2015. Sagittarius and Scorpius are in the background, with the centre of the Galaxy rising in the southeast. This is a single 30-second exposure at f/2 with the 24mm lens and Canon 5D MkII at ISO 4000.
Expert deep-sky observers Larry Mitchell and Barbara Wilson gaze skyward with Larryโs giant 36-inch Dobsonian telescope at the Texas Star Party, May 2015. This is a single 60-second exposure with the 14mm lens at f/2.8 and Canon 5D MkII at ISO 3200.
A deep-sky observer at the top of a tall ladder looking through a tall and large Dobsonian telescope, at the Texas Star Party, May 2015. Scorpius is rising in the background; Saturn is in the head of Scorpius as the bright star above centre. Anatares is just below Saturn. This is a single 30-second exposure at f/2.5 with the 24mm lens and Canon 5D MkII at ISO 6400.
Circumpolar star trails over the upper field of the Texas Star Party, May 13, 2015. I aimed the camera to look north over the field to capture the stars circling around Polaris in circumpolar trails over about 1 hour. Some cloud and haze obscured parts of the sky. Lights from cities to the north add the sky glow at right. The streaks at top are from the stars of the Big Dipper. This is a stack of 55 exposures, each 1 minute long, at f/2.8 with the 14mm lens and Canon 5D MkII at ISO 3200. The foreground comes from a single image in the series, masked and layered in Photoshop. The images were stacked using the Long Trails tapering effect with the Advanced Stacker Actions from Star Circle Academy.
I extend myย thanks to the organizers for the great event, and for the opportunity to speak to the group as one of the featured evening speakers. It was great fun!
Mercury and Venus shine as “evening stars” over the Red Deer River in southern Alberta.
What a fine night this was for nightscape shooting. Mercury and Venus are both now about as high as they will get for the year in the evening sky from my western Canadian latitude.
Venus is easy to spot as the brilliant object in the west. But Mercury is more elusive. You can see it here low in the twilight glow and much dimmer than Venus.
The photo illustrates how far each of the two inner planets swings away from the Sun in our skies, and why Mercury has its reputation for being difficult to sight. Also, it appears at its best for only a couple of weeks at a time. By mid-May it will be gone.
Venus, however, continues to dominate our western sky for the next two months.
I shot the main photo from the deck of a rickety wooden bridge over the Red Deer River near Dorothy, Alberta, just off Highway 10 east of Drumheller in the Badlands.
The image is a high-dynamic-range “HDR” stack of five exposures.
Shortly after taking the lead photo, I drove west to the Atlas Coal Mine to shoot it by the light of the now high and nearly Full Moon. Mercury can still be seen low and to the right of the historic tipple building. Venus shines above it.
This is a single 25-second exposure at ISO 800.
The Atlas Coal Mine is now a National Historic Site and is the last standing from what was once a booming coal mining centre in the Red Deer River Valley.
The iconic Double Arch looks great under dark skies, moonlight, or painted with artificial light.
Last night, I returned to the Double Arch at Arches National Park, to capture a star trail series, starting from the onset of darkness at 9:30 p.m., and continuing for 2.5 hours until midnight, an hour after moonrise at 11:00 p.m. The lead image is the result.
I think it turned out rather well.
The Big Dipper is just streaking into frame at top right, as I knew it would from shooting here the night before. The bright streak at upper left is Jupiter turning into frame at the end of the sequence.ย Note how the shadow of the moonlit foreground arch matches the shape of the background arch.
On the technical end, the star trail composite isย a stack of 160 frames, each 45 seconds at f/2.8 and ISO 3200, with the Canon 6D and 14mm lens. The foreground, however, comes from a stack of 8 frames taken toward the end of the shoot, as the moonlight was beginning to light the arches. An additional 45-secondย exposure taken a couple of minutes after the last star trail frame adds the star-like points at the “head” of the star trail streaks.
I used the excellent Advanced Stacker Actions from StarCircleAcademy to do the stacking in Photoshop.
Before starting the star trail set, I took some initial short-exposure nightscapes while the sky was still dark. The result is the aboveย image, of Double Arch in a dark sky. Passingย car headlights provided some rather nice accent illumination.
On such a fine night I thought others might be there as well. Arches is a very popular place for nightscape imaging.
Sure enough, 6 others came and went through the early evening before moonrise. We had a nice time chatting about gear and techniques.
As expected, a few photographers came armed with bright lights for artificially lighting the arches. I kept my camera running, knowing any illumination they shone on the foreground wouldn’t affect my star trails, and that I’d mask in the foreground from frames taken after moonrise.
Here’s one frame from my star trail sequence where one photographer headed under the arch to light it for his photos. It did makeย for a nice scene โ a human figure adds scale and dimension.
However,ย I always find the light from the LED lamps too artificial and harsh, and comesย from the wrong direction to look natural. I also question the ethics of blastingย a dark sky site with artificial light.
On aย night like this I’d rather wait until moonrise and let nature provide the more uniform, warmer illumination with natural shadows.
As an example, I took this image the night before usingย short exposures in the moonlight to capture the Big Dipper over Double Arch. When I shot this atย 11 p.m. I had the site to myself. Getting nature to provide the rightย light requires the photographer’s rule of “waiting for the light.”
What a fabulous night for some nightscapes at Arches National Park, Utah.
I’m at Arches National Park for two nights, to shoot the starsย over itsย amazing eroded sandstone landscape.
I started the night last night, April 6, shooting Orion over Turret Arch while the sky was still lit by deep twilight. That image is below. It shows Orion and the winter sky, with bright Venus at right, setting over the aptly-named Turret Arch.
I scouted the location earlier in the day and measured in person, as expected from maps, that the angles would be perfect for capturing Orion over the Arch.
But better still would be getting Orion setting through the Arch. That’s the lead photo at top.
I shot the star trail image laterย in the evening, over half an hour. It uses a stack of 5 exposures: a single, short 30-second one for the initial point-like stars, followed by a series of four 8-minute exposures to create the long star trails. The short exposure was at ISO 4000; the long exposures at ISO 250. All are with the Rokinon 14mm lens.
Archesย is a popular and iconic place for nightscape photography.
I thought I’d likely not be alone, and sure enough another pairย of photographers showed up, though they were armed with lights to illuminate the Arches, as many photographers like to do.
I shot this from afar, as they lit up the inside of Turret Arch where I had been earlier in the night.
I prefer not to artificially illuminate natural landscapes, or do so only mildly, not with bright spotlights. We traded arches! โ while I shot Turret, the other photography couple shot next door at the North and South Window Arches, and vice versa. It all worked out fine.
Later in the night, after moonrise, I shot next door at the famous Double Arch. Those moonlit photos will be in tomorrow’s blog.
It was a very productive night, and a remarkable experience shooting at such a location on a warm and quiet night, with only a fellow photographer or two for company.
The Full Moon rises behind the famous Mitten buttes at Monument Valley.
I spent a fabulous weekend capturing sunsets and nightscapes at the iconic Monument Valley on the Utah/Arizona border,ย the photogenic outdoor setย of dozens movies over the decades.
On the eve of the total lunar eclipse I shot the nearly Full Moon rising behind the West (left)ย and East (centre)ย Mittens and Merrick Butte (at right). On the evening of Friday, April 3 the Moon rose and sat amid the sunlit clouds with the Sun still up.
The alignment that would place the Moon directly opposite the Sun to create the eclipse was still 11 hours away.
Note how the butte’s shadows point almost, but not quite directly, at the nearly Full Moon. They point at the place in the sky the Moon would be before dawn at the end of that night.
But on eclipse eve the Moon rose 30 minutes before the Sun set, providing a chance to catch the Moon behind the still sunlit red buttes.
I shot this image about 20 minutes after sunset on April 3, so the foreground is now in shadow but the Moon appears in a more richly tinted twilight sky.
Later on April 3 I captured this scene, with the Tear Drop and Rock Door Mesas now lit by a bright Full Moon, and with the stars of the winter sky setting into the west. Canis Major and Orion are at left, while Taurus, including the Pleiades star cluster and brilliant Venus, are at right.
The Orion & Venus image is a 2-panel panorama.
On the evening of April 4, clouds thwarted plans for a long star trail sequence above a moonlit foreground.
Instead, I shot toward the Moon and clouds, to capture subtle moonbeams radiating out from the Moon, now some 14 hours after the eclipse, rising behind Merrick Butte. I shot this from the dusty Loop Road that winds through the valley floor.
Instead of lots of images for a star trail composite, I was content to shoot this one image, catching the Big Dipper in a brief hole in the drifting clouds, hanging in the sky over the West Mitten butte. The foreground is lit by the partly obscured Full Moon. The long exposure streaks the moving clouds.
Night or day, it’s hard not to take a great photo here, clouds or not!
On my final evening at Monument Valley, high winds common to the area, blowing dust, and the closed Loop Road, scuttled plans again for long star trail sequences from the valley floor.
So on Easter Sunday, April 5, I settled for a panorama from the classic viewpoint showing the setting Sun lighting the buttes and mesas of Monument Valley.
It is an amazing place, but one that still requires patience to wait out the clouds and dust storms.
A truly dark sky isnโt dark. It is filled with glows both subtle and spectacular.
Last night, March 10, I drove up into the heart of the Gila Wilderness in southern New Mexico, to a viewpoint at 7,900 feet in altitude. I was in search of the darkest skies in the area. I found them! There was not a light in sight.
The featured image is a 180ยฐ panorama showing:
โ the Zodiacal Light (at right in the west)
โ the Milky Way (up from the centre, in the south, to the upper right)
โ the Zodiacal Band (faintly visible running from right to left across the frame at top)
โ the Gegenschein (a brightening of the Zodiacal Band at left of frame, in the east in Leo)
The Zodiacal Light, Zodiacal Band, and the Gegenschein are all part of the same phenomenon, glows along the ecliptic path โ the plane of the solar system โ caused by sunlight reflecting off cometary and meteoric dust in the inner solar system.
The Gegenschein, or โcounterglow,โ can be seen with the naked eye as a large and diffuse brightening of the sky at the spot exactly opposite the Sun. It is caused by sunlight reflecting directly back from comet dust, the scattering effect greatest at the point opposite the Sun.
The Zodiacal Light requires reasonably dark skies to see, but the fainter Zodiacal Band and Gegenschein require very dark skies.
Now is prime season for all of them, with the Moon out of the way, and the Zodiacal Light angled up high in the western as twilight ends. In March, the Gegenschein is now located in a relatively blank area of sky in southern Leo.
The Milky Way is much more obvious. Along the northern winter Milky Way here you can see dark lanes of interstellar dust, particularly in Taurus above and to the right of Orion. Red nebulas of glowing gas also lie along the Milky Way, such as Barnardโs Loop around Orion.
โ Orion is at centre, in the south, with Canis Major and the bright star Sirius below and to the left of Orion. Canopus is just setting on the southern horizon at centre. It barely clears the horizon from 32ยฐ North latitude.
โ To the right of Orion is Taurus and the Pleiades star cluster at the top of the Zodiacal Light pyramid.
โ Venus is the bright object in the Zodiacal Light at right, in the west, while fainter Mars is below Venus.
โ At far right, in the northwest, is the Andromeda Galaxy, M31.
โ Jupiter is the bright object at upper left, in the east, in the Zodiacal Band, and near the Beehive star cluster.
โ The Zodiacal Light, Band and Gegenschein all lie along the ecliptic, as do Mars, Venus and Jupiter.
Glows on the horizon are from distant SIlver City, Las Cruces and El Paso. The brighter sky at right is from the last vestiges of evening twilight. Some green and red airglow bands also permeate the sky.
I shot this March 10, 2015 from the summit of Highway 15, The Trail of the Mountain Spirits, that twists and winds through the Gila Wilderness.
It was a stunning night, clear, calm, and silent. Just me under the ghostly glows of a truly dark sky.
NOTE: I first published this March 11 but had to republish this blog March 15 after WordPress deleted the original post in a software bug. Thanks WordPress!ย
Laser beams point out Comet Lovejoy at a public star party at City of Rocks State Park.
It was a perfect night last night for public stargazing. I headed out to the State Park for the monthly star party, held at the Orion group campground (with Orion nicely placed in the sky above) and home to a fine public observatory.
The Gene and Elizabeth Simon Observatory features a Meade 14-inch Schmidt-Cassegrain telescope which gave great views of Jupiter with one of its moons, Callisto, in transit as a dark dot on the face of the planet.
About 70 people turned out, from the Park’s campground and from the nearby communities. Here Matt starts the night with a laser guided tour of the constellations. These bright lasers are wonderful for public events like this but when in the wrong hands they can be dangerous.
Another technical innovation popular at the City of Rocks Star Parties is an iPad running Sky Safari software, and on a tripod with handles so people can move it about the sky to identify stars and constellations for themselves. It works great. Here, I pose with it for a staged photo, with the Big Dipper in the background.
Here I pose with the Observatory’s 14-inch telescope.
In all, it was a superb night at surely one of the finest places on the planet for public stargazing. I recommended toย the Park officials that they should apply for official Dark Sky Preserve status. They would qualify without question.
The Big Dipper and the Pole Star shine above the moonlit historic Hearst Church.
Tuesday was a productive evening of shooting in the moonlight. One of the best from the night pictures the Hearst Church in the rustic town of Pinos Altos in the Gila Forest of southern New Mexico.
The Big Dipper stars shine at right, with the Pointer stars in the Bowl aiming at Polaris above the Church. Illumination is from a waxing quarter Moon and from some decorative lights in the yard next door across the street.
The Hearst Church was opened in May 1898 and indeed is named for the famous Hearst family. Money to build the church was raised by the local mining families with a major donation from Phoebe Hearst, wife of the mining magnate and senator George Hearst. Phoebe was also mother to newspaper tychoon William Randolph Hearst, the inspiration for Orson Welles’ movie Citizen Kane. Gold that decorates Hearst’s mansion in California came from the family mine near Pinos Altos.
As the mining boom went bust the Methodist church lost its pastor then its congregation. It is now an art gallery and home to the Grant County Art Guild. See their website for details on the historic church.
While I know many of my blog’s followers enjoy the photos for their own sake, lots of folks also like to learn more about the technical aspects of the images.
So with this blog, and selected others in future, I’ll present a bit more of the “how-to” information.
How the Image Wasย Shot and Processed
Taking the image could not have been simpler. It is a single 45-second exposure at f/2.8 with the 24mm lens and Canon 6D at ISO 800, on a static tripod, about as basic as you get for nightscape shooting. There is no fancy stacking or compositing.
The trick is still in the processing, however. Here is a breakdown of the Photoshop CC 2014 file and its various layers. Every aspect of the processing is non-destructive. No pixels were ever harmed in the process. Every adjustment can be tweaked and modified after the fact.
< Star spikes top layer added with “Astronomy Tools” actions from Noel Carboni.
< Sharpening layer created from stamping the final layers into one layer using the Command-Option-Shift-E command, then a High Pass filter applied, blended with Soft Light and masked to sharpenย just the ground.
< Adjustment layers for colour, brightness & contrast, and levels, applied to the sky and ground separately with masks, created using Quick Selection Tool and Refine Edge.
< A Clone &ย Heal layer for wiping out the power lines & power pole, using the Patch & Spot Healing Tools.
< The base image, opened from the developed Raw file as a Smart Object, with noise reduction and sharpening applied as Smart Filters.
I know this won’t explain all the processing steps but I hope it provides some idea of what goes into a nightscape.
All this and much more will be explained in an upcoming half-day “Photoshop for Astronomy” Workshop I’m presenting Saturday, May 9. If you are in the Calgary, Alberta area, consider joining us. For details and to register, see the All-Star Telescope web page.ย
Also, my ebook featured below has all the details on shooting and processing images like these.
What a beautifully photogenic comet Lovejoy is proving to be!ย
On Friday, January 16, I caught Comet Lovejoy crossing the ecliptic as it travels through Taurus. The long exposure above shows it amid the star clusters, nebulas, and dark clouds of Taurus and Perseus.
The blue Pleiades is at centre, and the red California Nebula is at top. Throughout are the dark tendrils of the dusty Taurus Dark Clouds.
The long blue ion tail of Lovejoy now extends back 15ยฐ to 20ยฐ on photos and is easy to trace for half that distance in binoculars in a dark sky.
I turned the top photo 90ยฐ to orient the comet so it points “down.”
However, this wide-angle nightscape shows the real orientation of the comet, high in the sky above Orion, here rising over the rock formations of City of Rocks State Park, my favourite dark sky site in this area of New Mexico.
Taken earlier in the evening, this ultra-wide image shows the comet at top, with its blue tail oriented along the ecliptic and aligned with the Zodiacal Light, from the glow of sunlight reflecting off comet dust in the inner solar system.
The Zodiacal Light follows the ecliptic, the plane of the solar system and where we find the planets, such as Mars and Venus at bottom here. The comet seems to point toward the Sun, now below the horizon here at the base of the Zodiacal Light. That’s just as it should be! Comet gas tails always point away from the Sun, as they are blown away from the comet’s head by the solar wind.
This night Comet Lovejoy was crossing the ecliptic, as its orbit continues to take it north in a path almost perpendicular to the ecliptic. While planets orbit in the ecliptic plane, most comets do not. They can have orbits oriented at all kinds of angles off the ecliptic plane.
But on January 16 Comet Lovejoy crossed the ecliptic, placing it at the apex of the Zodiacal Light.
This wider view takes in the Zodiacal Light, the comet and Orion rising at left.
Lightroom Contenders: Five Raw Developers
Photoshop Contenders: Four Raw Developers with Layering/Compositing
The Amazing Sky 