The B+W 72mm Kaesemann High Transmission Circular Polarizer MRC Filter is constructed from Schott glass to ensure an increased optical clarity and better color fidelity. It even includes an F-Pro brass filter ring that does not bind to the aluminum housing of the lens, thereby increasing durability as well as prevents jamming. The filter helps reduce glares and reflects as it filters out polarized light. Light usually becomes polarized when it reflects off a non-metallic surface. The Kaesemann HTC polarizing foils arrange polarized light perpendicular to the reflected light to allow for maximum transmission of light. This helps to clear up hazing that can be seen in distant landscapes and provides more saturated and vivid colors.