Originally posted by Cerebum So many false claims I am beginning to wonder if tomioka is mythical like a photographic unicorn
The lens maker is definitely real, though their role as OEM producer of SLR lenses under multiple brands is harder to confirm. What is known is that they were owned by Yashica from 1968 and made Yashinon-labeled lenses and rumored to have made a broad range of product for other camera companies through much of the 1960s into the 1970s.
The relationship between various fast 50s in M42 mount is fairly easy to establish on teardown (identical optics), but often other factors (grips, size, focal/aperture combinations, etc.) are given unreasonable weight. A good example might be the common assertion that Mamiya/Sekor SLR lenses were made by Tomioka, despite M/S being a major lens maker in their own right.* An association with various M42 Rikenon SLR lenses is well-established, but not for all models. A similar situation exists for Chinon and several other minor makers.
Tomioka - Camera-wiki.org - The free camera encyclopedia
Steve
* I confirmed this by personal discussion with a former Mamiya/Sekor employee who did work on my 1000 DTL.
Last edited by stevebrot; 03-07-2020 at 02:52 PM.