Coating Dimming Process: The use of coating light reduction technology avoids the color cast problem of traditional ND lens filter, and there is almost no color cast. Optical Glass: The lens adopts high quality optical glass through high definition grinding treatment, showing clear image quality. Applicable Models: Specifically designed for DJI Action 2 camera, the ND/PL lens filter can effectively improve the shooting effect and meet your needs. NDPL Filter This filter combines the advantages of ND filter and PL polarizer, which can prevent overexposure, resist scattered light, reduce shutter speed, extend exposure time, eliminate reflections, increase saturation, and bring more space for photography creation . The number after ND represents the dimming ability. Multi Layer Coating: Double sided multilayer nanometer coating technology, the lens has waterproof, oil proof, anti fouling and scratch proof performance.