A Zuiko 55mm f/1.2 lens for OM system cameras. This lens a lot of oil on the aperture blades, enough to prevent the aperture from fully opening after the lens is stopped down. The only way to open the iris up again is to reset the f-stop to 1.2. This may or may not be an issue for you, depending on your intended use for this lens. Other than those two issues, the lens is in fine condition, obviously used, but no big scratches on the casing and no marks on the glass itself..