Hoya 55mm 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 hoyas high transmission super multi coating minimizes reflection at the filter surfaces which reduces flare and ghostinghoya 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 foc