MegaGear Red - Yellow - FLD Filter + 58mm Metal Housing Lens Filter Converter Adapter for GoPro, GoPro HD, GoPro HRR03+, GoPro Hero4, Hero 5 Black, Hero 6 Black cameras Made from the finest solid optical glass, are ground and polished to the most practical thinness. Fliter also fits for DSLR cameras with a 58mm filter thread They are heat-treated to avoid any distortion or focal shift, and each filter is subject to strict tests in order to ensure a flawless, even surface, which is essential to a quality filter and exceptional photographs.