The B+W 72mm XS-Pro KSM Circular Polarizer MRC Nano Filter provides rich image saturation when shooting in bright lighting conditions. It is made for 72mm lens threads. This polarizer has an adjustable filter factor of 2–2.8, which helps reduce exposure by 1 to 1.5 stops. The filter offers optimum performance even when pointed directly at the sun. A multi-coating is applied to the filter to reduce ghosting and internal reflection and to provide 99.5% light transmission. The filter is designed from Schott glass and features a nano coating for an improved beading effect with water to ensure easy cleaning and maintenance.