Thanks for info. Its interesting that they have adapters for the old Prominent system. Time to look for a nicely priced copy. Will be interesting to compare the look from the Nokton with the Summarit 50 1.5 and the old CZSonnar 50 1.5.
Oh.. i meant the old CZ Sonnar for the Contax rangefinders or for LTM (expensive and rare)! I'm fortunate to own a good copy of it in Contax mount, will need an amadeo adapter for it for M mount. The bubbles in glass, from what I read, signifies good quality of glass due to limited manufacturing processes in the past <http://www.zeisscamera.com/services_overhaul-cIIa-lenses.shtml>.