DJI Mavic Air ND Filters Set (ND4/8/16)The DJI Mavic Air ND Filters Set consists of three neutral density filters to reduce light reaching the camera by 2 3 4 stops to effectively avoid over exposure, so that you can capture correctly exposed aerial photos videos in a wider range of lighting environments. The three ND filters provides you with more control of the camera's aperture, exposure time, and sensor ISO sensitivity settings. Put more simply; ND filters help avoid overexposure. ND4