It depends very much on the camera.? The relevant term to look out for is "flange focal distance".? That's the space between the body of the camera and sensor.? For DSLR's that's typically on the order of 50+mms, but it can vary by quite a bit.
The sensor size determines how much vignetting you will get.? The largest bottleneck on my 15" Obsession UC is the seconadry, then the Paracorr II.? Keep the chip size comfortably within the range of decent field illumination and you will be fine.? Yet another reason to avoid a DSLR, particularly a full frame one.? You will need to modify your scope to get it to focus AND to illuminate a decent part of the chip.?
My ZWO ASI183MC has a very short flange focal distance.? When used as a 2" eyepiece, it has a Paracorr II position on the tunable top.? There is NO need for me to alter anything from visually.? If I did another more serious that EAA, I would want a threaded connection between the Paracorr II and the camera, but I don't, so I won't!? It just too much of a hassle to unscrew the set screw to unthread the tunable top.? The downside of this camera is its small pixel size of 2.4 microns.? That necessarily means lower SNR per pixel.? Bin2 works fine in the dob, and native works fine in my refractors.? Best of both worlds for me.
