Hoya 58mm Circular Polarizer Super Multi-Coated (S-HMC) Glass Filter - Thin - Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter your camera lens.
Hoya's High Transmission Super-Multi-Coating minimizes reflection at the filter surfaces which reduces flare and ghosting.
Hoya SMC Slim Polarizers are for wide-angle lenses, are 5mm thick, and do not have a front thread.
Note! Circular polarizers are specifically designed for use with auto-focus SLR cameras (They will also work on manual systems without problems)