James wrote awhile back:
<< I'm pretty sure that the Vivitar 17mm was actually manufactured by
Tamron and is the same lens as the SP
17mm Tamron. Spiratone also had one and it definitely was the Tamron.
It is an excellent lens and is
very sharp! >>
Dunno about the Vivitar/Tamron connection. But, the Spiratone was made
by Sigma. I have a busted one here (Nikon mt) and it even sports a
Sigma lens cap - but who would have known since the S on it could have
stood for "Spiratone" also.
Gary Reese
Las Vegas, NV
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