Aside from the optical aspect of the lens, it has the typical built quality of the zebra version of the Pentacon 50mm f1.8. This one is in great condition, although the focusing ring is a bit dry; no doubt due to the aging grease. The elements are pretty clean for such an old lens. No hazy stuff inside, which is really nice.
The series of pictures below were taken inside my company's cafeteria, while waiting for my wife to finish, and all were shot wide open at f2. I can say that at f2, the lens is very usable. Not really sure how the edges performs, though. I think it probably won't be as good as a Carl Zeiss Jena Tessar 50mm f2.8. The Tessar design is know for very good corners. We will see later when I get around to shooting outdoors with it.
Real Beauty, eh? Click for larger.
Boheh - NEX-6 & Carl Zeiss Jena Pancolar 50mm f2 @ f2. Click for larger.
Water Valve - NEX-6 & Carl Zeiss Jena Pancolar 50mm f2 @ f2. Click for larger.
Bar Stool - NEX-6 & Carl Zeiss Jena Pancolar 50mm f2 @ f2.
Algo Cafe - NEX-6 & Carl Zeiss Jena Pancolar 50mm f2 @ f2.