With an optical density of 0.9, the Phantom 4 Part 39 ND8 Filter allows 1/8 Light Transmittance and enables a three-stop light reduction. Specifically made for the DJI Phantom 4, this ND8 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 settings.