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I have a 10 inch unguided, non goto (i.e. completely manual) dob (skywatcher flextube) and took the picture attached with the following equipment:
6mm TMB Planetary II (clone) eyepiece ($55)
Canon a590is in video mode, 20 fps, 640x480 resolution, using optical zoom at 4x - I bought this about 4 1/2 years ago new for $109. It is a compact camera not an SLR.
Televue 2x Barlow ($109)
I attached the camera to the eyepiece with the help of a stepdown ring and a business card cut up to take up the slack.
The hardest thing was getting the telescope positioned so that Saturn would drift through the field of view.
I processed the video files on a pentium 4 computer, using free software.
I think you are best off getting a decent 2x barlow, and a point and shoot camera with video mode (you may already have one knocking around, or get one second hand for very little). That will get you started for very little extra outlay.
Good luck with it!
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