The Konica M-Hexanon 90mm f2.8 is a short telephoto lens compatible with M-mount rangefinder cameras. Konica used to say that these lenses would only work with their own Hexar RF, for some reason, but that's not the case: you can use this lens on anything with an M mount, including Leicas and Cosina Zeiss/Voigtlander models. This one is in excellent condition, with only very minor cosmetic wear, clean glass, and good function.