Bokina or the Vivitar serie 1 F2,5 90mm macro, lens up to 2:1 and with optical corrected Macro extender 1:1.
brilliant high performance lens from 1976, as a 90mm but also in macro !!
bought this one with extender for 7,50 Euro in mint condition
“Vivitar is a famous Los Angeles photo marketing firm that competed with the big boys as major 35mm SLR lens makers from about the mid 1970's to the late 1980's with their Series 1 lenses. “
“No, Vivitar did NOT own their own lens factory. Instead Vivitar hired the best lens designers they could find (using then state of the art computers in the USA) to make the best lenses they could under the premium "Vivitar Series 1" brand name. Super lens designs were produced, some which had never been seen before. Series 1 lenses of this period were very good lenses indeed, often as good or even better than major lens manufacturers. “ Courtesy to Cameraquest site >> [link]
Also see Courtesey David Kovaluk Blogspot >> [link]
Nesster on flickr >> [link]
cameraquest >> [link]