View Full Version : Wistar 210mm f5.6

8-Oct-2008, 04:39
Does anybody know who produce(d) these (http://page8.auctions.yahoo.co.jp/jp/auction/h56045464) lenses? Could it be Osaka or Nikon? Any information on it's tech specs? THX.

Phil Hudson
8-Oct-2008, 04:58
I can't be definitive but I think it was Topcor......

8-Oct-2008, 05:41
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.