P3 Series ND4/CP Filter by SRP for the DJI Phantom 3 Professional grade combination filter (neutral density 4 and circular polarizer) for the DJI Phantom 3 camera The CP portion of the filter - Reduces glare on the surface of water or windows, manages reflections, and increases the contrast between the clouds and sky. The ND portion of the filter - Reduces the effects of rolling shutter including the jello effect and prop blur. Weighs only 7.5 g! High quality Schott glass filter and Delrin adapter