Comet Garradd (C/2009 R1) next to M15 globular cluster, Aug 1/2, 2011, with Astro-Physics 130mm f/6 apochromatic refractor and Canon 7D camera. Stack of 4 x 8 minute exposures at ISO800, but comet image only from the last frame (it moved significantly from exposure to exposure).
The Amazing Sky 