The Canon ET-83D is the dedicated replacement lens hood designed specifically for the Canon EF 100-400mm f/4.5-5.6L IS USM II telephoto zoom lens. A lens hood is an essential accessory for any serious photographer, blocking stray light from entering the lens at oblique angles to reduce flare and ghosting, and helping to maintain contrast and colour accuracy in your images. The ET-83D is engineered to the exact specifications of the 100-400mm L II, ensuring a secure, precise fit without vignetting across the full zoom range. It also provides an added layer of physical protection for the front element against knocks, bumps, and the elements during outdoor and wildlife shooting sessions.