R mount

The R mount is the mount used for Leicaflexes and R cameras. While the mount remains the same in both cases, the number of cams varies.

• Wapedia R-bayonet page
  
• Jeff Griffin's Cams and Couplings
• Karen Nakamura's-R
• R-lenses on Cannon Cameras

Cams

Leicaflexes :

• 1 cam
• 2 cams

R :

• 3 cams
• 1 cam (also called the R cam; also the lenses are engraved for R only)
• ROM

Canon EOS bodies

It should be noted that an increasing number of R mount lenses are used on Canon EOS body, through an adapter.