Kiev-16U is Russian 16mm film movie camera. It has lenses with M32x0.5 screw thread mount.
The adapter is purposed for Canon EF-M mount cameras. Infinity focus is preserved.
Please keep in the mind that sensor of Canon EOS M camera is larger thatn 16mm film camera frame. So, Kiev-16U lenses will vignette. Shown picture was took with 50mm lens. Wider lenses will vignette more.
Adapter is made of high quality aluminium alloy, anodized and laser engraved.
Weight is 24 g.