The Olympus OM 24mm f2.8 Screw-on Metal Lens Hood is a genuine vintage accessory from Japan designed specifically for the Olympus OM system. This circular hood is compatible with a 24mm lens, providing protection and reducing glare for improved image quality. The high-quality construction and precise fitting make it a reliable and stylish addition to any photographer's gear, ensuring optimal performance for their Olympus OM lens.