50mm clamp to M52x0.75 male thread adapter

• Front side - 50mm inner diameter
• Rear side - M52x0.75 male thread

Machined of high quality aluminium alloyWhy aluminium?.

A lens is secured in the clamp with 3 screws. Flat metal tension spring protects the lens body from scratches. 50mm bore goes through the whole adapter, so you can push the lens past rear adapter end if necessary.