M42
- Type
- Screw
- Flange focal distance
- 45.46 mm
- Throat
- 42 mm
- Thread pitch
- 1 mm
Measured from M42 lens mount, and the list of lens mounts, which that page does not always agree with.
A thread, not a product: Praktica, Pentax, Zenit, Chinon and others all used it, and no one of them owns it. That is why a mount has no brand segment in its URL. The bare spelling `Screw` is ruled here rather than under `leica-m39`: it comes from the Edixa Reflex, a West German SLR built by Wirgin on the M42 thread.
Also written M42 screw mount and Screw.