RICOH 50mm f/2 prime lens, made in Japan, 52mm filter thread. - Brand: RICOH - Model Name: Rikenon P 50mm f/2 - Diameter: 52mm - Country of Manufacture: Japan - Focal Length: 50mm - Aperture: f/2 Thank you for viewing. This item was purchased used. No front cap, rear cap is third-party. There are no major scratches, but as it is an old lens, there are some scuffs and signs of use. The lens is clean for its age, but there is some dust. I don't see any mold to the naked eye.