This Osmo Action ND Filter Set from DJI outfits you with three ND filters for your Osmo Action 3 or Action 4 to reduce the light hitting the camera's sensor for improved exposure and motion in daylight conditions. Included in the set are one ND8, one ND16, and one ND32 filter to reduce light intake by 3, 4, or 5 f-stops. This allows you to lengthen your shutter speed without the risk of overexposing your image while enhancing motion blur. The filters easily attach to your camera without the need for tools and feature AF-coated glass that is water and stain-proof.