Voigtlander Bessa-R brand_Cinestill the camera end is a

the camera end is a standard F mount but practical compatibility will depend on the shape of your camera (some bulkier AF and digital cameras will require an additional extension tube- not included- to clear the back of the rail)

It's not though

The Pentax ME is a compact 35mm SLR camera with manual focus and aperture-priority autoexposure

suitable for any camera with a threaded shutter button

Voigtlander Bessa-R brand_Cinestill the camera end is aThe Voigtlander Bessa R is a compact 35mm rangefinder camera compatible with Leica thread mount lenses. A fairly modern camera with mechanical shutter speeds up to 1 2000s and an easy to use TTL light meter and a better viewfinder than most thread mount cameras, though the rangefinder patch needs a centred eye. In excellent condition, with good function and minor cosmetic wear.