I bought some filters for my drone but I am not sure about the correct situations to use them. Circular Polarizer Filter (CP): The circular polarizer filter helps enhance aerial videos by reducing the amount of light relecting off the ground, sky, or water. Removing this reflecting light allows the Phantom 3 to capture beautifully saturated colors and improves contrast. 2-Stop Neutral Density: This 2-stop neutral density (ND) filter is the middle shade used for filmging on mild days, i.e. partly cloudy or during the golden hours. This filter helps reduce highlights as well as reduces lens flare when shooting into the sun. This is the most commly used of the two ND filters. 3-Stop Neutral Density: The 3-stop ND is the darkest shade and should be used on very bright days. This filter helps prevent lens flare, and reduces any mild rolling shutter. This filter also slows the shutter speed enough to blur the propellors when they are in frame. I am afraid I might have bought from the wrong company because some combine the ND filter with the CP filter. I understand that you use the ND filters when it is too bright out but how do you tell when to use the CP instead of one of the two ND filters?