This horshead is by FAR better than the best I was ever able to make.

For the FOV: I used a small scope, 250mm focal length (not diameter, that is 50mm), so this is small magnification. But this camera has small pixel pitch, but relatively large sensor (as being 6 MP), so I get nearly the same FOV as I get with the large scope, and a DSLR.

Here is the same M42 from a year ago, with the large scope, and a Nikon D7000 DSLR, 106 times 4 sec expo (I cannot remember, but most probably it was tracked by the Synscan handcontroller):