This dual-purpose Aureole ND64/PL Hybrid Filter combines the benefits of a neutral density filter with a polarizer filter to create sharp, high-quality images with proper exposure. The neutral density reduces light from hitting your camera's sensor by 6 f-stops, while the polarizer filter reduces glare from naturally reflective surfaces like water. This makes the filter best utilized in very bright, sunlight conditions. Multicoated optical glass makes the surface water-resistant and oilproof while maintaining natural color reproduction.