Comet Lovejoy (C/2013 R1). I had to work hard to capture this one. It was up before dawn but the time window was limited to image it and I wanted lots of exposure to show the extent of the tail.
2013-12-07 at the Alberta All Star Party.
Canon modified 6D with 300mm lens.
Exposure - 34 frames at 120s, f/4 and ISO 2500.
Processing in Photoshop.