The B+W 67 mm Kaesemann High Transmission Circular Polarizer MRC Filter is a useful accessory that every professional photographer should have. It helps in eliminating haze and reflections while capturing photos. This results in an improved tonal and color saturation. This filter has its strongest effect when used at an angle of 90° from the sun. Use the Circular polarizers for preventing the disruption of auto exposure and other focus features. In addition, this filter also comes with a 2 to 2.8x filter factor, which reduces the exposure by 1 to 1.5 stops. Made from Schott glass, this filter provides a great deal of optical clarity.