Time to revisit this post from last October. We still feel strongly that this lens was made by Zunow for Yashica.
Simple Answer – Yes
Yashica Auto Yashinon f/ 1.7 5.8cm lens designed exclusively for Yashica’s Pentamatic II. It appears for the first time in August 1960 and disappears from use by Yashica in January 1961. There’s no documentation about the lens and no hard evidence that Zunow made the lens. Hard evidence would be sales brochures or advertisements that specifically link Yashica and Zunow. Co-branding on the lens ring would have been nice but never happened. Unfortunately our claim that it was made by Zunow is, at this point in time, circumstantial and coincidental. Much more digging around needs to be done on our part.
The lens features the unique Pentamatic bayonet mount that couldn’t be used on any other SLR of the time without an adapter. That in and of itself could have been a major reason for the quick demise of the Pentamatic series of cameras.
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