I tried the Canon DSLR on my new Newtonian and came up with a pretty nice test shot. I guided the main OTA using a small finder scope I'd converted to a guide scope.
Exposure: 20 x 60 seconds, ISO 800
Telescope: Skywatcher 200mm f/5 Newtonian
Mount: Atlas EQ-G
Camera: Modified Canon Rebel Xt + Baader MPCC