C to M43 lens adapter

This adapter allows mounting of C-mount lenses on Micro-four thirds cameras. The adapter accepts lenses with a base diameter less them 37.5 mm.
Note that many C-mount lenses designed for cameras with sensor size 1" and 4/3" have a base diameter larger than the maximum compatible with M43 mount. Some brands of lenses, including the Navitar NMVxxM1 and the VST xxH1 series can be custom modified to fit this adapter.