The Sensei Wide-Angle Rubber Lens Hood is designed for wide-angle lenses and blocks stray light from entering the lens, reducing possible lens flare. The ridged interior provides a matte finish, further minimizing reflections. The durable, anodized aluminum ring threads the hood easily onto the lens, and the interior threads on the ring enable you to screw a filter on or clip a lens cap inside the hood to protect the lens. The hood's slim design allows you to pack the lens and hood away comfortably inside your camera bag.