M42 Lens To Leica M Body (Techart Pro LM-EA7) Adapter

M42 is the "universal" screw thread mount for SLRs that is usually associated with Praktica and Pentax. It was actually used by many brands, including Fujica, Mamiya/Sekor, and Zenit. Because it is an open standard and has a relatively long flange distance, it has also been a very popular mount for adapting to other mounts (notably excluding Nikon F). There are many commercial adapters for M42 lenses to other mounts, including Leica M.

Ok, so why 3D print this one? Because we can seems like a