BlueBeach ES-68 Replacement Lens Hood for Canon EF 50 mm F/1.8 STM (Not compatible with other lens model) Note * This lens hood is specifically design for Canon EF 50 mm F/1.8 STM only (Not compatible with other lens model). Please Check your lens model before purchase.* Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens This Lens Hood will help blocking the Sun or other light sources to prevent glare and lens flare. In addition since the end of the lens is extended you also get the added benefit of some extra protection from accidental impact If you have lost the lens hood for your lens here is a chance to buy a affordable replacement.