Deflects oblique light angles that often cause flare effects Helps protect front of the lens scratches and dings while shooting Lens hoods are primarily designed to avoid 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. Dedicated lens hoods are designed to match the specific focal length of the lens it was designed for. Made of quality PVC material, durable to use. It shades the lens from stray light, improving your contrast and image quality. It can assist in keeping moisture or wind-blown debris off the lens. It protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles. What's in the box 1 x HB29 Lens Hood