This lens hood maximizes the amount of hood coverage for the minimum amount of weight and hood area because of its "petal" shape.This dedicated camera lens hood is specifically designed to match the exact focal length of the lens it was designed for. The main function of the camera lens hood is to shade the lens from stray light, improving your contrast and image quality. But lens hood will also protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles and in inclement weather, flower camera hood can assist in keeping moisture or wind-blown debris off the lens.In addition, sine the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact.