>>3121862There are no native C-mount stills cameras, only surveillance and old amateur movie cameras.
Get a cheapo micro4/3 camera (Olympus or Panasonic) or Nikon 1 series, and a C-mount adapter. I'd recommend Olympus due to image stabilization that will work with C-mount lenses.
Larger sensors are a waste with C-mount lenses, even if a few lenses cover them, the quality towards the edges is typically abysmal due to a combination of vignetting, massive field curvature, CA and general softness (although if you're into Lomography shit aesthetic, this might be a plus)