52mm HD MC UV Filter for Canon EF 200-400mm f/4L IS USM Extender 1.4X — Low-Profile Pressed Aluminum Frame

52mm HD multi-coated ultraviolet (UV) filter made for the Canon EF 200-400mm f/4L IS USM Extender 1.4X. Eliminates UltraViolet Light (UV) to help maintain image clarity and accurate color rendition while serving as a protective glass UV filter for the front element. Constructed from resilient optical glass and housed in a low-profile pressed aluminum frame for a slim, durable fit.