Posted by les on April 27, 2001 at 11:49:05:
In Reply to: Wollensak 90mm f12.5 Series IIIa EX.W.A. Specs PLEASE! posted by Monte Collard on April 26, 2001 at 22:53:32:
Kingslake states the angle of view is 95° in "Handbook of Photography". Without doing a complete autopsy on my 5x7 model it looks like a series IV protar to me. Each cell is a achromat.
Uncoated it perfoms like a moderat wide angle lens, great for contacts, good for moderate englargement. A 90mm Optar or Angulon will out perform it. I don't know the diamter of coverage.