B+W XS-Pro Circular Polarizer MRC nano KSM CPL 55mm

Features Circular Polarizer Filter 99.5% Transmission, Kaesemann Foils 2 to 2.8x Filter Factor, +1 to 1.5 Stops Helps to Eliminate Reflections and Glare Reduces Haze in Landscapes Greater Color and Tonal Saturation MRC Multi-Resistant Coating Thin Brass Filter Ring High Transmission Circular (HTC)  Kaesemann High Transmission Circular (HTC) polarizing filters are fitted with polarizing foils which provide 99.5% light transmission that are cemented between plano-parallel optical glass. The resulting sandwich is then precision-polished to achieve accurate plano-parallel surfaces. Finally, they are edge-sealed to protect the foil against humidity. Multi-Resistant Coating (MRC) To prevent internal ghosting and reflections, each glass surface includes multiple layers of anti-reflection coating. This Multi-Resistant Coating (MRC) also offers further protection to the filter substrate and helps it to stay clean for longer than with uncoated filters. The Nano coating associated with XS-Pro filters provides an additional eighth layer over the MRC, resulting in an improved beading effect when in contact with water for greater cleaning efficiency.