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SIGMA Y-S mount
| Name Manufacturer / Model | Mount Bayonet | Type Category | Year Released | Focal mm | Aperture f/ | Weight g |
|---|---|---|---|---|---|---|
Spiratone85mm F/1.7 | SIGMA Y-S | Portrait | — | 85mm | f/1.7 | 505g |
SpiratoneTelephoto 135mm F/1.8 | SIGMA Y-S | Portrait | — | 135mm | f/1.8 | 1078g |