Sigma YS lenses


Sigma YS adapter mounts were available in models to fit popular 35mm SLR cameras. They fitted any YS lens to the particular camera body to provide full automatic operation of the lens diaphragm and meter coupling where appropriate. All YS adapter mounts (and lenses) had the identical specifications as T-mount lenses and adapters. However, with T adapters the operation of YS lenses would be non-automatic.

Third party lenses (13)
Sigmatel MF 135mm F/1.8 (Sigma-XQ) [YS] ⌀77 1972 
Sigma[-XQ] MF 16mm F/2.8 Filtermatic Fisheye [YS] 1973 
Sigma[-XQ] [Widerama] MF 18mm F/3.2 (Spiratone) [YS] ⌀72Pro 1972 
Sigma[-XQ] MF 24mm F/2.8 Filtermatic [YS] ⌀62 1972 
Sigma Widemax MF 28mm F/2.8 [YS] ⌀62 1970 
Sigma[-XQ] MF 35mm F/2.8 [Flash Auto] [YS] ⌀52, ⌀62 1975 
Sigma[-XQ] MF 55mm F/2.8 Macro [YS] ⌀55, ⌀621:2 @ 0.25m 1973 
Sigma[-XQ] MF 100mm F/2.8 Macro [YS] ⌀62 @ 0.9mPro 1972 
Sigma[-XQ] [Telemax] MF 135mm F/2.8 [YS] ⌀52, ⌀62 1971 
Sigma[-XQ] [Protel] MF 200mm F/2.8 [YS] ⌀72 1973 
Sigma[-XQ] [Minitel] MF 200mm F/4 [YS] ⌀52, ⌀62 1971 
Sigma[-XQ] [Macrotel] MF 300mm F/4 [YS] ⌀77Pro 1972 
Sigma[-XQ] MF 400mm F/5.6 [YS] ⌀72Pro 1976 

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