[veraikon]

Flange Distances of Medium Format camera systems

To adapt a lens on camera system and to focus to infinity the register/ flange distance (FD) of the lens has to be greater than the FD of the camera system.

Code:

   
Camera System          Mounttype      Register (FD)in [mm]      Diameter in [mm]    Comments

Mamiya RB          bayonet          112.00          60          111.00     according to  pentaxforums.com.
Mamiya RZ         bayonet         105.00         60         108.00     according to pentaxforums.com.
Rolleiflex SL66          bayonet          102.8          ?           according to  pentaxforums.com.
Pentax 6×7          bayonet          84.95          72      
Hasselblad 1000F/1600F      multi start thread      82.1         78          Focal-plane shutter (no shutter in lens)
Kiev 88, Salut, Zenit 80      multi start thread      82.1         78         Very similar to Hasselblad 1000F/1600F; may or may not fit
Kowa Six/Super 66          breech lock      79        69
Hasselblad V System     bayonet          74.9         69        Leaf shutter inside each "C, CF, CFE"lens; used on Hasselblad 200/500/2000. Hasselblad "V"
Pentacon 6          breech lock      74.1          60          Identical to Exakta 66 and Kiev 60. also named "P6"
Rolleiflex SLX         bayonet         74.00          ?

Pentax 645          bayonet          70.87          61.2 

Bronica ETRS          bayonet          69.0 ± 0.03        ?           Measured to back of body (mount surface for film back)
Contax 645            bayonet        64,00          ?     
Mamiya 645          bayonet          63.3          62    
Hasselblad H System         bayonet         61.63        ?
Leica S              bayonet          53          ?           Register mentioned on  Luminous Landscape

sources: https://de.wikipedia.org/wiki/Auflagema%C3%9F
Alphabetical List of Camera Mounts