The lens hood can prevent non-imaging light into and avoid mist in the backlight, side light or flash photography. It also can prevent accidental damage to the lens and avoid finger touch prints on the lens surface, but also can block the sand, rain and snow. Made from Eco-friendly abs material, durable in long time use. The bayonet mount design makes it firmly on the lens. Suitable for Canon EF 100-300mm f/4.5-5.6, USM EF 100mm f/2, USM EF 85mm f/1.8 USM. What's in the box 1 x ES62II Lens Hood