Details: Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens%2E In addition%2C since the end of the lens is extended%2C you also get the added benefit of some extra protection from accidental impact%2E %0D%0AThe %22petal%22 shape of this lens hood maximizes the amount of hood coverage for the minimum amount of weight and hood area%2E This dedicated lens hood is designed to match the specific focal length of the lens it was designed for%2E %0D%0A