Does anybody know who produce(d) these lenses? Could it be Osaka or Nikon? Any information on it's tech specs? THX.
Does anybody know who produce(d) these lenses? Could it be Osaka or Nikon? Any information on it's tech specs? THX.
Hello,
I can't be definitive but I think it was Topcor......
Phil
Last edited by Phil Hudson; 8-Oct-2008 at 05:54. Reason: typo
I have one Wistar-W 150 which i like very much. As far as I know they are the same lenses as Osaka 6-lement and Congo Alto-W lenses. In short: manufactured by Congo in Japan. Some of them are 6/4 (elements/gropus) and others 6/5, I donīt remember exactly. The sharp coverage should be somewhere around 70 degrees, but the circle of illumination may be as large as 76 degrees. They are compact with small filter sizes but protrudes more than other lenses.
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