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Registration Distance

Registration distance (or flange distance) is an important factor when adapting a lens to a different mount.

Mount

Registration distance in mm

Leica M

27.8

Canon FL/FD

42

Minolta SR/MC/MD

43,5

Sigma SA

44

Canon EF

44

Minolta AF/SOny Alpha

44,5

Rolleiflec SL25

44,6

Exacta

44.7

M42

(Pentax Screw/Zeiss Screw (ZS))

45.46

Pentax K

45.46

Zeiss C/Y (for Contax/Yashica)

45.5

Olympus OM Zuiko

46

Nikon F (and Zeiss ZF)

46.5

Leica R

47

Mamyia 4,5x6

63,3

Pentax 4,5x6

70,87

Pentacon six

74,1

Hasselblad

74,9

Pentax 6x7

84,95

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