The DJI ND4 filter is purposely built for the DJI Phantom. This filter reduces the amount of light coming into the sensor. It gives you the freedom to create your own work by allowing more control of the camera's aperture, exposure time and sensor sensitivity. The ND4 filter helps avoid overexposed photos. The ND4 filter allows 1/4 of incoming light through, equivalent to a 2-stop filter.