B&W B+W 77mm Circular Polarizer Glass Filter 65062162 Polarizer filters evenly increase color saturation of all colors except black and white, creating deep, rich scenics Polarizers also eliminate glare from highly reflected surfaces like glass and water Polarizers are two part lenses that rotate, allowing you to select the degree of additional saturation, contrast and glare reduction desired Gives the same deep contrast and glare reducing properties to black and white photography Combines with Red filters for incredibly dramatic black and white landscapes