UV (Haze) 1A Multicoated | Multithreaded Glass Filter (52mm) For Pentax K-500 Grade 010 (Filter Factor: 0 Zero) Rugged Metal Filter Ring (Black Finish) | Heat Treated Glass Slim Design Minimizes Vignetting Multicoated Designed For Video Or Photography | Multithreaded For Mouning Lenses Or Filters On Top