The autumn constellations of Perseus (left), Andromeda (centre) and Pegasus (right) over the peaks of the Columbia Icefields in Jasper National Park, including at right Mt. Andromeda named for the mythological princess. Taken on Sept 14, 2014 on a very clear night before moonrise. The waning quarter Moon is rising in the southeast at left. The foreground illumination of the moraines from Athabasca Glacier is from moonlight. The Andromeda Galaxy is at top centre.
This is a composite of 5 shots, tracked, for the sky, blended in Lighten mode and 5 shots, untracked, for the ground, blended in Mean combine mode to reduce noise. The trailed sky is masked out of the ground shots and the trailed ground is masked out of the sky shots, so both ground and sky are sharp but the sky has the benefit of the longer exposures required to really bring out Milky Way details. Each shot was 75 seconds, all at f/2.8 with the 15mm lens and Canon 6D at ISO 1250. Tracked on the Sky-Watcher Star Adventurer, with the drive turned off for the ground images at the end of the sky exposures. Taken from the lower parking lot area just up the Forefield Trail visible at the bottom.
The Amazing Sky 