Hi Kurt, I downloaded the image "20091220 NGC7320FlattedClip.fit" and opened it. You mentioned that it had been "dark and white flatted". In looking at the image it appears to have considerable thermal noise. The noise is about what I would expect with this camera running at -10 deg and a 240 second exposure. In looking at the FITS header, in shows that you had done some processing on the raw image. I wonder if the link you posted is not the dark subtracted image? Would it be possible for you to post on your site the raw image as well as the darks and flats you used? I have been following your adventures with the Rent-a-scope program. In your experience is it difficult to get time on a particular scope or do you post a request which gets put into the ACP planner queue? Jerry Foote ScopeCraft, Inc. 4175 E. Red Cliffs Dr. Kanab, UT 84741 435-899-1255 jfoote@scopecraft.com