Pentax Q and Long Tele is just fine. I just posted these elsewhere, and rest assured, this was hand held. TAIR-3 300mm f4.5
The black and white is the Q's onboard processing, the others are PP with Silky. I find that the White balance on my Q is utter trash.
The Rolling shutter isn't that bad as long as you keep the shutter speed up, and You're not going to see any color fringing in B&W for obvious reasons. Hell, I have test shots SOMEHWERE with a 1000mm Mirror that are decent, though I'd hightly recommend a Tripod at that point.
That Said, a Fast Fifty will do wonders as well. Super-Takumar 55mm 1.8 on Unicolour Bold Red.
AS for C-Mount, the Pentax made COSMICAR are really nice for fast lenses. This was the 6mm 1.2 With Unicolour Bold in camera set on Teal.
I think I actually use this thing more than the K-50. And I really love it for the B&W Settings (Mostly because you can squeeze extra speed out no problem), though you can really push it's in camera Raw and with some user tweaking you can get some really good In Camera JPGs.
But that White Balance, That is going to be the bloody end of my patience. EVERYTHING IS BLUE.