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Forum: Pentax SLR Lens Discussion
09-10-2018, 07:14 AM
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By 47mm mount I assume you mean the "faux" t-mount that has a 47mm thread to mount the camera mount ring (= t-ring) rather than a 42mm thread. (pic here). For me that mount is definitively tokina - it's only seen on Tokyo koki and rebranded tokyo koki (=tokina) lenses from the 1960's.
In that case that's an interesting, even historic, and I would guess rare early tokina made mirror from that era.
There's a thread on mflenses discussing mainly the later Chinon/ohnar/makinon mirrors.
Your lens is listed on M42lens.com .
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