GP-1x Accessory LensesBuilt for all out efforts in mud, over cobbles, through the gravel, dirt, rain and fog. UNMATCHED LENS COATINGS ROKA C3 optics are more than just a lens. We design for performance in real world conditions. The advanced coatings we use are applied in an ultra clean manufacturing process that ensures quality, consistency. Each coating is applied, cured, and tested for purpose built performance and transmission. Each lens is coated, custom built for the