JUNESTAR Multi-Coated KB ND Series Filter for DJI Osmo Action 4 / 3 Lightweight Waterproof Diving Lens Filters - ND16 High Definition Imaging is Immersive: High-quality lens grinding process and excellent performance make the image quality clearer high definition imaging, pure without color deviation Schott Optical Glass: High-definition professional optical glass with high durability and scratch resistance, multi-layer nano-coating process to ensure clear imaging Multi-Layer Coating Reduces Reflection: The multi-layer nano-coating process endows the lenses with high-quality waterproof, oil-resistant, stain-resistant, and scratch-resistant properties, restoring true colors Stable and Not Easy to Fall Off: Aviation aluminum light and thin frame. the mirror frame is made of aerospace-grade aluminum material, with a secure seal and easy cleaning of dust and stains, lightweight, durable, and fully protective for the lens, not fading or rusting ND Dimming Mirror Image effet: Intense light: environment, preventing overexposure, blocking scattered light, increasing color saturation. Make the picture more transparent and colorful. Realize large effects such as foggy flowing water and nighttime light tracks; Video effect: Reduce the shutter speed to make the video image have appropriate dynamic blur and look more comfortable Package included: 1 x ND Filters Other items not included