Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surfacePolarizing filters arrange and filter directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the lightClears up haze in distant landscapes and provides more saturated, vivid colorsStrongest effect when used at a 90° angle from the sunCircular polarizers are ideal for use with digital cameras and autofocus lenses where a linear polarizer will often disrupt auto exposure and focus features2x filter factor reduces exposure by 1 stopConstructed from Schott B270 glass for increased optical clarity and color fidelityEach glass surface includes 16 layers of anti-reflection coatings to prevent internal ghosting and reflections as well as to provide an improved beading effect when in contact with water or oil for greater cleaning efficiencyAluminum alloy filter ring assembly for durability while remaining lightweightFilter ring can be rotated to adjust the intensity of the polarization effect