Lowepro Inverse 100 lens mount_Mamiya 645 B+W 010 UV-Haze MRC F-Pro

B+W 010 UV-Haze MRC F-Pro filter for 52mm filter threads

and there may be a few others out there

The Tamron Adaptall mount is a sophisticated universal mount system with autoaperture coupling (and sometimes even electronic communication)

The AH focusing screen for the Canon New F-1 is a matte screen with horizontal and vertical scales marked in mm

Shutter speeds are solid

Lowepro Inverse 100 lens mount_Mamiya 645 B+W 010 UV-Haze MRC F-ProThe Lowepro Inverse 100 is a shoulder bag waist pack style camera bag designed to hold a camera and a few small accessories. In excellent condition. Interior dimensions are approximately 14x18x24cm.