The Freewell ND32/PL Hybrid Camera Lens Filter for HERO10 and HERO9 Black features handcrafted optics designed specifically for use with your HERO10 and HERO9 Black cameras. This combination ND and polarizer filter performs the functions of a polarizer, including glare reduction and darkening of blue skies to help your camera capture accurate colors. The filter also adds neutral density to the polarizer to help control the camera's exposure settings. The filter absorbs a total of 5 stops of light. The filter maintains the high quality of your camera's optics, and its lightweight nature and robust construction make it suitable for use doing drone and gimbal work. To protect the filter from the rigors of production, the optical glass features a color-neutral coating that protects it from water, dust, scratches, and oil. Note: The filters are themselves waterproof and protect your lens, but they do not make the camera waterproof.