- Compatibility and benefits Waterproof filter designed specifically for Insta360 Ace and Ace Pro. It helps suppress highlights and darken overly harsh contrast, reduces oversharpening in the focus area, and delivers a softer overall image. - Glass and coatings 1.5 mm optical glass with multi-layer nano coatings. The glass is 1.5 mm thick, scratch resistant and impact resistant, and able to withstand high water pressure. It features a built-in rubber ring for waterproofing and anti fog performance, with oil resistance and scratch resistance to minimize lens reflections and glare. - Frame design Aluminum alloy frame weighing only 8 g. The lightweight construction does not affect gimbal calibration and does not block the lens angle of view, helping to prevent dark corners during shooting. - CPL polarizer The CPL polarizer removes reflections, increases color saturation, and makes images more transparent. It enhances clarity and expressiveness, restores true colors, and makes the sky bluer and the water clearer. It is also useful for shooting landscapes behind glass, and for scenes involving water and underwater life. - Use scenarios - Outdoor bright light and water scenes such as beaches, lakes, and rivers where glare is a problem and a softer, more natural look is desired. - Shooting through glass, such as windows or aquariums, to reduce reflections and improve transparency and color accuracy. - Action or travel scenes near water or in rainy conditions where enhanced color, clarity, and reduced reflections improve overall footage, including water and underwater life footage.