Here are two: The New CCD Astronomy, by Ron Wodaski The Handbook of Astronomical Image Processing (includes AIP4WIN software), by Berry & Burnell - currently out of print - they will be releasing a 2nd edition in about a month. ------------------------- Subject: Re: [Utah-astronomy] Best digital SLR for astro imaging Patrick, You can see the results of both cameras in the challenge section of the digital-astro group. This is what I did before I bought my Rebel. I don't have the link right now but as soon as I get back online I'll send you the link. By the way, can anybody recommend a book on image processing? Debbie