Pro Glass HD MC 77mm UV Filter — Fits Pentax SMCP-FA 645 400mm f/5.6 ED IF Lens (26555)

Confirmed to fit the Pentax SMCP-FA 645 400mm f/5.6 ED IF Lens (26555), this Pro Glass HD MC 77mm UV filter is constructed from resilient optical glass. It blocks ultraviolet (UV) light while providing protective front-element coverage.