Please help me identify this mount

Started 2 months ago | Questions thread
ProfHankD
ProfHankD Veteran Member • Posts: 6,713
YS
1

John Michael Winterbourne wrote:

ProfHankD wrote:

John Michael Winterbourne wrote:

I suspect that your lens has a "YS" mount, in M42.

Way back, SP often meant "Screw-thread for Pentax" (which is M42) -- as opposed to the later K bayonet for Pentax cameras, which tended to abbreviate as PK. The SP abbreviation seems a bit strained until you realize the Pentax's dominant series of screw thread bodies were SPotmatics....

That makes a lot of sense, but it makes me wonder how many different people made "YS" lens mounts? Sigma did, and I have one made by Sun (Courtesy of Dave at Heritage Cameras).

I believe it was a collaborative effort between the founder of Sigma, Michihiro Yamaki, and Fred Spira of Spiratone fame: YS.

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