A classic Olympus OM-System standard lens with a bright f/1.4 maximum aperture and 50mm focal length. The G.Zuiko Auto-S 50mm f/1.4 is a compact manual-focus lens made for the Olympus OM system and is well suited to collectors and users of vintage Olympus equipment. Serial number: 411399. The lens was purchased as tested and working. Before listing, the aperture mechanism and focusing ring were also checked. The aperture blades operate smoothly and respond correctly when the aperture mechanism is activated. The focusing ring turns smoothly throughout its range. The optical elements have been visually inspected. No fungus, haze or major scratches were observed. The exterior is in very good vintage condition with minor signs of age and use. Please examine the photographs carefully for the cosmetic condition of the lens.