M-Mount
If KIPON IBERIT manual focus lenses seem “deja-vu-ish” to you, it’s probably because they were once marketed under the name HandeVision IBERIT, which was a partnership between German optics manufacturer IB/E Optics and the Chinese Shanghai Transvision Photographic Equipment company which, as you might have guessed, is based in China.
All KIPON IBERIT lenses feature maximum apertures of f/2.4, 58mm filter threads, solid, all-metal construction, and engraved depth-of-field and focus-distance scales. Plastic rear caps and 58mm metal screw-in