- Front side - M65x1 female thread and M39x0.75 female thread
- Rear side - Leica M male bayonet mount
Machined of high quality aluminium.
This adapter allow using focusing helicoids with M65x1 thread of cameras with Leica M mount.
It has a female M39x0.75 thread as well, so you can install a filter there if necessary (polarization or UV protection, for example).