Who built it?

[herron]

casualcollector said:

....There was much cooperation among Japanese manufacturers and Osawa, as a trading company, had their fingers in many pies. My guess is that Osawa branded lenses were made by one of the companies they distributed or, perhaps, owned.

Here's one for Ron... Did Osawa actually own Mamiya, or at least a significant portion of it? I recall Osawa's collapse nearly did Mamiya in back in the mid 80s. Only the medium format stuff was salvaged.

Osawa was the significant distributor of Mamiya equipment in the 80s. They were a lensmaker in their own right, and a trading company that dealt in many other commodities, as well. They may have owned a piece of Mamiya also. Their collapse in 1984 was considered the worst company failure in modern Japanese history, and it dealt a severe blow to Mamiya's efforts. Severe enough to almost bankrupt Mamiya, as well.

Mamiya consolidated their efforts on their popular medium-format professional line of cameras, as the most profitable way to proceed, and ended all research and manufacture of 35mm cameras.

[pentaxgraflex]

Looks like a cross between a Tokina (focus ring looks identical) and a Soligor
(the macro ring is identical to what they used on a bunch of their lenses).

[Reiska]

Presumably Japanese lens manufacturers used subcontractors to make certain parts to their lenses. Today it is a rule in "invisible" parts of any mass production. The difference between products is in outer coverings and imago.