Comet Lovejoy (C/2013 R1) in the pre-dawn sky with a waning gibbous Moon lighting the sky, on the morning off November 21, 2013. This is a stack of 5 x 75 second exposures with the 135mm lens at f/2.8 and Canon 5D MkII at ISO 1600, tracking on the iOptron SkyTracker.
The Amazing Sky 