Hey Marc
I only use the 12" for planetary imaging. I *could* use it for deep-space imaging with my 350D, but I'd have to move the mirror up the tube otherwise it won't come to focus.
Guys like Paul Mayo (
PhotonCollector) and Clive (
Alchemy) have used 12" GSO Newt's for deep space imaging with their DSLR's, but they've had to move the mirror up the tube to do so.
Some of their work is brilliant. But they're also on G-11's. By the time I tacked on a guide scope to my 12", the EQ6 would be well and truly struggling
One day I'd probably look at getting an 8" f/4 as a deep-space imaging newt, and use it with my 350D.