BlueBeach Compatible 40.5mm Metal Lens Hood Vented Replacement for Canon Nikon Olympus Sony Pentax Leica Suitable for all lens that requires a 40.5mm Lenshood Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens In addition since the end of the lens is extended you also get the added benefit of some extra protection from accidental impact