Mamiya Press Pinhole Lens board

0.4mm Pinhole lens board for Mamiya Press lens cones, and OEM Mamiya Press cameras. Uses a smooth, magnetically latched, shutter plate for easy use. 

Images shows lens board mounted to a Six:12, but it is compatible with all cameras that have Mamiya Press lens mount, giving an approximately F/150 aperture, with 62mm film to pinhole distance.