GREEN.L 16-Layer Multi-Coated Neutral Density ND64 Filter For DJI Phantom3 Professional Advanced DJI filter ND filter (Neutral Density) reduces the amount of light reaching the film without affecting the color. Can be used to enable slower shutter speeds. Can be used to better separate subjects from the background by allowing wider apertures, effectively decreasing depth of field. Great for portraiture and outdoor scenes. (MC-16)16 layer waterproof green coating optical glass, better transmittance and clarity, helps to avoid oxidation