50mm f/1.8 manual focus lens. - Brand: OLYMPUS - Model Name: AUTO-S 50mm f/1.8 - Aperture: f/1.8 - Focal Length: 50mm - Focus Type: Manual Focus - Mount Type: OM Mount Thank you for viewing. The exterior shows some signs of use, but is relatively clean. The focus ring is smooth. The aperture ring has a good click feel. There is no oil on the aperture blades. The lens has been cleaned, but there may be slight dust. The lens is clear with no mold or haze. Please feel free to ask any questions you may have, and I will answer them to the best of my ability. Thank you.