true colors with the double sided multilayer coating technology, realistic color reproduction moment with the Aluminum Frame Filter, featuring high definition imaging and precise polish optical glass Only UV filter can transmit 98.5% of the light, while CPL / NDPL cannot be represented by transmittance Whether you ' re outdoors or indoors, the lens filter provides protect and light Designed for GO3 / GO2 users, this filter is perfect for photography enthusiasts and professionals