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Circumpolar Star Trails from Arizona.jpg
Circumpolar star trails from latitude +32° from southern Arizona, December 2015, from the Quailway Cottage. This is a stack of 300 exposures, each 45s at f/2.8 with the 15mm full-frame fish-eye lens, and at ISO 2500 with the Canon 6D. Taken as part of a time-lapse sequence. Stacked with Advanced Stacker Plus actions with the Elastic Stars effect. The ground is from an average stack of 8 exposures at the end of the sequence.