Pro Glass 77mm HD MC UV Filter — Fits Pentax SMCP-FA 645 300mm f/4.0 ED IF Lens (26505)

Compatible with Pentax SMCP-FA 645 300mm f/4.0 ED IF Lens (26505). 77mm high-definition, multi-coated ultraviolet (UV) protective filter that shields the front element. Constructed from resilient optical glass housed in a low-profile, pressed aluminum frame for secure, slim-fit mounting.