For Osmo Action 5 Pro, 4, and 3 Housing Diving Color Lens Filter 1. Made of high-quality PC material for durability. 2. Features a professional-grade lens with precision grinding for enhanced image clarity. 3. Blocks harmful UV rays, reduces haze, and corrects chromatic aberration in landscape photography. 4. Offers high optical transparency and accurate color reproduction. Waterproof and scratch-resistant to protect the lens. 5. Optimize underwater color performance based on water conditions: - Purple filter: Designed for green-tinted water (e.g., freshwater lakes or saltwater with green algae) at depths of 5–25 meters. - Red filter: Best used in clear blue water at depths of 10–20 meters under direct sunlight to restore red tones and balance color. - Pink filter: Enhances contrast and color accuracy in blue water, delivering natural, warm tones.