This is a Standard ND8 prop filter the FC Stream and FlightCam360 cameras. How does a prop filter work? An HD camera image sensor is controlled by the amount of light it senses. In normal lighting conditions, the scanning frame rate of any CMOS HD camera causes any fast moving objects to move during the scanning motion (frame rate) of the camera. Our filter tricks the lens sensor into increasing the exposure value of the camera. The brighter the conditions, the stronger the filter you will require. The ND8 works well on sunny days.