Auroral curtains are covering most of the sky from northeast to northwest, as seen Feb 13, 2015 from the deck of the Churchill Northern Studies Centre, Churchill, Manitoba. The fish-eye lens takes in almost the entire 360° of the sky.
This is a single exposure with the Canon 6D and Sigma 8mm fish-eye lens for 25 seconds at f/3.5 and ISO 4000.
The Amazing Sky 