I tried shooting some sub-images of Comet ISON on Saturday morning, Oct 12th, but the fog and murk near the horizon was too much and the comet was barely registering.   So, I switched to Comet Lovejoy, which was much higher in the sky.  With the dawn quickly approaching, I went with one minute exposures and managed to get 24 good ones before twilight put a stop to my efforts.  Twenty-four subs gives me enough noise reduction to make it worth while.