Prairie Sunset Panorama
By: Alan Dyer
Tags: Alan Dyer, Alberta, astrophotography, atmospheric phenomena, cloud shadows, crepuscular rays, HDR, High Dynamic Range, Moon, Panorama, Photomatix, Photoshop, prairie, PTGui, Sunset, twilight, waxing Moon, wheatfield
What a spectacular sunset tonight. The Sun is just going down in a blaze of red, while the waxing Moon shines in the deep blue twilight.
I grabbed the camera fast when I saw this happening out my front window, and raced out to the ripening wheat field across the road.
The top image is a 360° panorama of the sky, with the Sun at right and the Moon left of centre. The zenith is along the top of the image.
I used a 14mm lens in portrait mode to cover the scene from below the horizon to the zenith, taking 7 segments to sweep around the scene.
You can see the darkening of the sky at centre, 90° away from the Sun, due to natural polarization of the skylight.
I shot this sunset image a little earlier, when the Sun was higher but still deep red in the smoky haze that has marked the sky of late. It certainly gives the scene a divine appearance!
This is a 5-exposure high-dynamic-range composite to capture the tonal range from bright sky to darker ground, the wheat field. I increased the contrast to bring out the cloud shadows – crepuscular rays.
I boosted colour vibrancy but didn’t alter the actual colours – it was a superb sky.
I used PTGui v10 to stitch the panorama at top and Photomatix Pro to stack and tone the HDR set. While Photoshop is wonderful it did not work for assembling either of these images.
– Alan, August 6, 2014 / © 2014 Alan Dyer