hiffin ET-63 Lens Hood for Canon EF-S 55-250mm f/4-5.6 IS STM The dedicated ET-63 Lens Hood is specifically designed for use with Canon's EF-S 55-250mm f/4-5.6 IS STM Lens. Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. Dedicated lens hoods are designed to perfectly match the specific focal length of the lens it was designed for. Also, since the end of the lens is extended, you get the added benefit of some extra protection from accidental impact. Features - Designed to accommodate the exact angle of view of the camera's lens. - Minimizes flare and ghosting by blocking out stray light. - Shields the front of your lens from extraneous light, Improving overall image contrast and color saturation. - Protects your lens from accidental impact and the elements. - The bayonet mount is designed to also work in the reversed position, allowing the hood to be placed backwards over the lens for a more compact storage solution. Compatibility - The ET-63 Lens Hood is dedicated for, and compatible with the Canon EF-S 55-250mm f/4-5.6 IS STM (Version 1)