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I agree that webcam is the way to go. I have recently got a ToUcam, but haven't yet imaged with it. However, here is a pic I took with my 12" Dob. There were 20 exposures of 1/50 sec, combined in Images Plus. ISO was 400 and the camera was an unmodified Canon 350D.
The main difficulty is getting accurate focus and I think this is why the pic is blurred.
In theory, you don't need a driven mount if you use a webcam, but I imagine itwould be pretty frustrating trying to get the image in position to drift across the small chip, focus and operate the camera.
Also Mick, I notice that your image has some colour fringers--red below, blue above. This looks like atmospheric dispersion. Was Saturn low? If yes, things would be improved by waiting for a higher pic.
Geoff
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