The ND4 Filter for Phantom 3 Professional and Advanced helps to avoid overexposed photos. Specifically designed for the DJI Phantom 3 Advanced and Professional Helps to reduce the amount of light coming into the sensor Gives you the freedom to create by allowing more control of the camera’s aperture, exposure time and sensor sensitivity settings Helps to avoid overexposed photos Allows 1/4 of the incoming light to pass through, equal to 2-stop filter strength