• Front side - M40.5x0.5 male thread
• Rear side - Pentax 67 male bayonet mount

Machined from high quality aluminium alloy.

This adapter can be used to reverse mount on a lens with M40.5x0.5 filter thread to a camera with Pentax 67 mount.

Alternatively, it can be used to attach a Pentax 67 bellows to a lens board with M40.5x0.5 thread.