In order to minimize noise in my data, I've gone the Tony Hallas way and started dithering between exposures. My setup is a simple one (EQ3 Pro with Pentax K20D, no guiding), and I try to keep everything as much standalone as possible, since I don't want to take my computer out in freezing cold or wet grass. Unfortunately this also means I have to do dithering by hand, i.e. pushing the Dec/RA buttons on the Synscan hand controller between exposures. Doing this for a few hours in a stretch a