Fuji Photo Film Co. Lens. EBC Fujinon, 1:1.8 f=55mm. Serial# 521338, lens Japan, screw mount. I am by no means a camera or lenses expert. Feel free to contact me with questions, or to correct me. When telescoping the lens, it feels slightly tight to me. I have never had one of these exact lenses before, so I don't know what is normal. May just be from setting for years. The aperture adjustment works, and feels ok, and the back pin seems to operate correctly. Also comes with 4 filters, all are 49mm Japan. They are: Promaster Spectrum 7 Polarizer, Hoya 808, Vivitar UV Haze Filter, and Hoya Skylight (1B). The lens storage case ain't pretty, but it's the right one. No caps. I do not have anyway to fully test this lens. If it does not work right, contact me that you want to return it. You will receive a 100% full refund. Physically and cosmetically shows signs of use, but not abuse, please see photos. Standard shipping for the 48-states is free. Elsewhere may be more. Thank You for looking!