My wife and I have come across 2 lenses, a Schneider-Kreuznach Retina-Tele-Xenar f:4/135mm, and a Rodenstock Retina-Heligon f:1.9/50mm. They both show signs of use, but appear to be in very good shape.
My wife and I are trying find out a little more about their value and quality. Can anyone point me in the right direction to research further? The Schneider seems to be more common and easier to find info on, but the we are having difficulty with the Rodenstock.
Thank you for your time. I truly appreciate any insight you can provide.