CPL Polarizer: This filter can mainly eliminate non metallic reflections, increase the concentration of color, make the picture more transparent, and improve the clarity of the picture. Optical Glass: This set of lenses are made of optical glass, high definition sharpness, high definition imaging, to meet the needs of professional photographers. ND Lens Filter: This filter can be used in bright light to prevent overexposure, resist scattered light, increase color saturation, and make the picture more transparent and vivid. Portable and Compact: This filter can be quickly disassembled and assembled in a non destructive manner, and is durable, compact and lightweight, making it easy to carry around. Coating: The filter lens has super waterproof coating, waterproof, oil proof, , scratch proof, easy to clean without leaving traces.