Originally posted by WPRESTO I had a Vivitar-branded 90mm macro in M-42 mount before I switched to K-mount. It was made to hold up small brick buildings. An excellent macro, possibly the same formula??
The Vivitar Series 1 90/2.5 Macro (and its 1:1 Macro Adapter) was a Tokina-made Vivitar macro, optically essentially identical, that preceded Tokina's own AT-X version of the lens (and its "Extender"). However, the several other Vivitar 90-105mm macro lenses were different critters.
And, BTW, if you look carefully at the
particular Tokina AT-X 90/2.5 in the following image of these "optical twins separated by birth", you can see that it is a P/K-mount lens and not a P/KA-mount lens. In my experience, the P/KA copies of this Tokina lens are more common than are the P/K copies, but both are quite commonly found -- neither is the least bit unusual -- this is different from the VS1 version, where PK/A copies are non-existant, since production of them stopped before Pentax introduced the era of its P/KA Program bodies and lenses.