Stela LH-83C Camera lens hood Compatible with 100-400mm f/4.5-5.6L IS Lens Hood  (125 mm, Black)

The LH-83C is a bayonet lens hood designed for use with this lens CANON EF 100-400mm f/4.5-5.6L IS USM only and will now work with any other hood. For details please match your lens description and name 100% before buying this LH-83C lens hood. A lens hood is designed so that it does not block the angle of view of the lens. Lens hoods block the Sun or other light source(s) to prevent glare and lens flare. Lens hoods may also be used to protect the lens from scratches and the elements without having to put on a lens cover. The geometry of a lens hood is dependent on three parameters: the focal length of the lens, the size of the front lens element and the dimensions of the image sensor or film in the camera. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the Sun, bright studio lights, or a bright white background. In addition, lens hoods can offer physical protection for the lens due to the hood extending farther than the lens itself protecting the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles.