This Inca 55mm Rubber Lens Hood is designed to prevent unwanted stray light from entering the lens. It is suitable for most zoom, tele, wide and standard DSLR camera lenses. This 3-position lens hood is compatible with telephoto or long zoom lenses when left in its unfolded, longest position. When folded in once, it works for standard focal length lenses and when folded back twice, it is ideal for wide-angle lenses.