Coment Christensen on the night of Aug. 19th, 2009 between 9:25-11:30PM MST. A series of 90 second exposures, aligned both on the comet (lower photo) and the background stars (upper photo), for a total of 1 hour 26 minutes of exposures.
10" F/4 Schmidt Newtonian (Meade) on Losmandy G-11 Mount. Astro (Canon) 400D cooled DSLR. Note the reddening of the background stars in the upper photo where the dust tail passes.