The summer Milky Way across the entire sky, 180° x 360°, in a fish-eye view taken at the Saskatchewan Summer Star Party, August 2012. This is a stack of five x 5 minute exposures at f/4.5 and ISO 1600 with the Sigma 8mm lens and Canon 5D MkII camera. All tracked. The ground is from one exposure; the ground in the other 4 exposures was masked out to minimize blurring of the ground over the 25 minutes of exposure time. A faint aurora and airglow adds some horizon colour.
The Amazing Sky 