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. This filter can make the shooting picture of the point light source produce a blue brushed effect to produce a wide light source pulling effect of the widescreen movie lens. Let more users in the premise of not having to change their own equipment can also be shot to a movie like video effects, for movie-like video effects, for your creation to bring convenience and creativity