DJI Flip ND Filters Set for Smooth Footage and Precise Shutter Speed Control (ND16, ND64, and ND256)The DJI Flip ND Filters Set contains the ND16, ND64, and ND256 filters. These filters provide experienced users with precise control over shutter speed, allowing them to produce smooth footage in bright environments with lower shutter speeds. Flexible use of this set can ensure clean footage, even when the shutter opens to 180 degree with a low ISO. If the camera is recording at 24fps with the shutter open at 180 degree, the exposure time is 1 48