High-Definition Imaging: Select high-quality optical glass for precise grinding and polishing. Pure without color deviation, easy-to-grasp exciting moments Schott Optical Glass: High-definition professional optical glass with high durability and scratch resistance. The multi-layer nano-coating process ensures clear imaging and meets the high pixel imaging standards during the shooting process Aviation Aluminum Material: Aviation aluminum frame material, firmly sealed, excellent waterproof performance, durable, real machine molded, attached to a waterproof shell, not fading or rusting Nano Coating Waterproof, Oil Resistant, and Scratch Resistant: Adopting a double-sided multi-layer nano-coating process provides high-quality waterproof, oil-resistant, stain-resistant, and scratch-resistant performance to lenses Quick Release: Easy and quick installation, attached to the diving shell lens ready to use, stable, and not easy to fall off Size: 56*6mm, 10g. UV filters are suitable for shooting in environments such as seashores, mountains, snowfields, and open spaces, and can attenuate the blue tint caused by UV rays. At the same time, the camera can also eliminate the interference of ultraviolet rays on the CCD, which helps to improve the clarity and color reproduction