Originally posted by Just1MoreDave Komine made several of the well-regarded Vivitar Series One lenses, such as the 90mm f2.5 macro. They also made some "regular" Vivitars such as the 135mm f2.8 and 200mm f3.5. I have never seen a Komine-branded lens.
Judging by the serial numbers, I believe that I have a few Komine-built Vivitar lenses -
VS1 28-90/2.8-3.5 Macro Focusing 284nnnnn
VS1 70-210/2.8-4 Macro Focusing Zoom [V.3] 284nnnnn and 285nnnnn
VS1 135/2.3 Auto Telephoto 288nnnn
Vivitar 135/2.8 Auto Telephoto Close Focusing 288nnnnn
VS1 200/3 Auto Telephoto 287nnnn
However, I didn't think that Komine made the VS1 90/2.5 Macro - at least, my two copies (both 377nnnnn) would seem to have been made by Tokina. (This would also be supported by the "fact" that Tokina's own 90/2.5 Macro seems to be optically identical to the VS1 90/2.5 Macro, even down to both having seemingly optically identical 1:1 macro adapters.)
Might you be referring to the Vivitar 90/2.8 Macro?
Originally posted by Just1MoreDave Vivitar said they designed the lenses and had them built by various manufacturers. It's not exactly clear how much Vivitar contributed. I have a few lenses with similar-looking coatings, made by Komine, Kiron and Tokina, but I have others that look different.
It is my understanding that Vivitar may never have actually built a lens, but instead contracted out all of its production. It does seem, at least from early Vivitar "folklore", that Vivitar also contracted out some of the designing, separate from some of the manufacturing, at least at one time.