Camkitmate Camera 3-Stage Lens Hood For 77mm Lens Collapsible Rubber 3 In 1 Black Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens 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. It can be collapsed into 3 styles for adjusting hood's length. What you will get:1 x Lens Hood