The stars of the northern sky circle in star trails over Bow Falls, on the Bow River, Banff, Alberta. This photo composite is a stack of 80 images, each 30 seconds at f/4 and ISO 800 with the 24mm lens and Canon 5D MkII. Stacked with Advanced Stacker Plus actions using Long Streak effect. The foreground is from one exposure and includes a faint moonbow at right over the falls as well as two people who wandered in for a look and stood still long enough for a single exposure.



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