The Fotodiox Dedicated Bayonet Lens Hood ET-65III is designed specifically for Canon EF lenses, including the 85mm f/1.8 USM, 100mm f/2 USM, and 135mm f/2.8 SF. This lens hood effectively blocks stray light, enhancing contrast and preventing lens flare and ghosting. Constructed from high-impact plastic, it offers durability while protecting the front element of your lens. The bayonet mount allows for easy attachment and can be reversed for convenient storage in your camera bag.