The OLYMPUS OM-SYSTEM G.ZUIKO AUTO-S 50mm f/1.4 lens is characterized by its bright aperture and high descriptive power. - Brand: OLYMPUS - Model Name: OM-SYSTEM G.ZUIKO AUTO-S 50mm f/1.4 - Focal Length: 50mm - Maximum Aperture: f/1.4 Thank you for viewing. The aperture blades and focus ring are functioning normally. The lens surfaces that can be disassembled have been lightly cleaned and are considered to be at a practical level. As this is an old lens that has been in the market for over 40 years, there may be some minor mold, slight haze, and dust particles. Please check the details in the photos. No returns accepted. #150