With only an hour of shooting time and with the comet low in my local light polluted skies, I managed to get a few decent images of Comet Machholz on 12/28/04.

I also assembled an animated GIF image of the comet in the darkening dusk sky as my telescope tracked it behind a tree.  CLICK HERE to view it.   

Comet Machholz rising over the trees in my backyard on 12/28/04.  7 Frames stacked in K3CCDTools.  Canon Digital Rebel, 200mm F/2.8, 4x30sec, 3x15sec.  Post processing in Paintshop Pro.

Comet Machholz, C/2004 Q2, early in the evening on 12/28/04.  Canon Digital Rebel, 200mm F/2.8, 36 separate images stacked, exposures of 15 to 30 seconds each..