SLR lens mount

YS mount mount

Everything about the YS mount: flange focal distance, native lenses, cameras and which adapters keep infinity focus.

55.00 mm
Flange focal distance
1969
Introduced
SLR
System type
0
Lenses in our database

Mount facts#

Mount
YS mount
Maker
YS
Type
SLR
Flange focal distance
55.00 mm
Formats
24×36 mm
Electronic contacts / AF
No (mechanical / manual)
Production
–1969

Adapting basics#

A lens can be adapted with simple tube spacers when its flange distance is longer than the camera's. With 55.00 mm, YS mount lenses can in principle go on bodies with shorter flanges such as Leica S, Arri PL, Tamron Adaptall, Contax N, KMZ Zenit DKL-mount, Leica R. Bodies with this mount can take lenses from longer-flange systems such as Mamiya 6, Vivitar TX, Mamiya 7, Hasselblad H, Ricoh 126C-Flex, Mamiya 645, Novoflex [de] A-mount, Contax 645.

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources

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