YS mount
For YS mount, flange focal distance (mm) is 55.00; mount type is SLR; format is 24×36 mm; production years is –1969, verified against its source on 2026-08-13.
- Mount name
- YS mount verified
- Flange focal distance (mm)
- 55.00 verified
- Mount type
- SLR verified
- Format
- 24×36 mm verified
- Production years
- –1969 verified
What the source says
YS mount | 55.00 mm | SLR | 24×36 mm | –1969 | | | | | Sigma, Upsilon, Accura, Polaris, Sun, Aetna, Beroflex, Petri, Raynox, N.P.S., Formula, Dionar, Universal, Soligor, Yashica, Spiratone. M42×0.75 (not to be confused with M42×1) Same as T-mount but with aperture coupling |
— en.wikipedia.org, retrieved 2026-08-13
Sources disagree
More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.
Flange focal distance (mm)
en.wikipedia.org says flange focal distance (mm) is 55.00, as of 2026-08-13.
YS mount | 55.00 mm | SLR | 24×36 mm | –1969 | | | | | Sigma, Upsilon, Accura, Polaris, Sun, Aetna, Beroflex, Petri, Raynox, N.P.S., Formula, Dionar, Universal, Soligor, Yashica, Spiratone. M42×0.75 (not to be confused with M42×1) Same as T-mount but with aperture coupling |
https://en.wikipedia.org/wiki/Flange_focal_distance
briansmith.com says flange focal distance (mm) is 55.00 mm, as of 2026-08-13.
YS mount | 55.00 mm | SLR | 24X36 mm
https://briansmith.com/flange-focal-distance-guide/
Format
en.wikipedia.org says format is 24×36 mm, as of 2026-08-13.
YS mount | 55.00 mm | SLR | 24×36 mm | –1969 | | | | | Sigma, Upsilon, Accura, Polaris, Sun, Aetna, Beroflex, Petri, Raynox, N.P.S., Formula, Dionar, Universal, Soligor, Yashica, Spiratone. M42×0.75 (not to be confused with M42×1) Same as T-mount but with aperture coupling |
https://en.wikipedia.org/wiki/Flange_focal_distance
briansmith.com says format is 24X36 mm, as of 2026-08-13.
YS mount | 55.00 mm | SLR | 24X36 mm
Sources
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Flange_focal_distance
- briansmith.comhttps://briansmith.com/flange-focal-distance-guide/