The other night I managed to image Comet Lemmon (C/2012 F6) as it passed by Gamma Crucis. Canon EOS 600D, Vixen Polarie, 85mm at f/2.8 and 200 at f/4. The animation contains 77 frames from a 100% crop of the 200mm shots.
Video here:
http://www.youtube.com/watch?v=FcRUb41aZ4U
Thanks for looking,
Tom