DJI Air 2S ND Filter Set (ND4/8/16/32)What these ND filters do ND filters reduce the amount of light entering your camera lenslike putting sunglasses on your drone camera. This lets you: Use slower shutter speeds without overexposing footage Maintain the cinematic 180 shutter rule (e. g., 24fps 1 48s shutter) Avoid overly sharp, choppy motion in video What each filter is for Each filter cuts a different amount of light: ND4 Mild reduction (cloudy or low brightness scenes) ND8 Slightly