• Front side - 54mm clamp with M67x0.75 male thread
• Rear side - Pentax 67 mount with M67x0.75 female thread, matching the first part

Machined from high quality aluminium alloy.

This adapter allows mounting lenses with 54mm outer diameter to cameras/bellows with Pentax 67 mount.

The adapter consists of two parts to let you position a lens deeper, if you want to minimize the distance between the lens and a camera sensor.

You can find details about using this adapter in the https://www.dpreview.com/forums/post/67591419 article.