77mm HD MC UV Filter for Canon EF 100-400mm f/4.5-5.6L is USM — 77mm Ultraviolet Filter, Low-Profile Aluminum Frame

Designed to fit the Canon EF 100-400mm f/4.5-5.6L is USM, this 77mm HD MC UV filter is a protective glass accessory for your lens. Constructed from resilient optical glass, the filter eliminates UltraViolet Light (UV). The assembly uses a low-profile pressed aluminum frame for a slim, secure mount.