This adapter allows mounting lenses with 44.5mm rear diameter to a focusing helicoid with M52x1 thread.
The 44.5mm hole comes thought the whole adapter, and you can insert a lens as deeply as necessary to reach infinity or at least usable focus distance range.
Flat metal tension spring protects the lens body from damage by screws.
- Front side - 44.5mm clamp
- Rear side - M52x1 male thread
Machined of high quality aluminium alloy.
Suitable lenses:
- KERSHAW TYPE 250 2.8/100mm