The key is that you want your shutter speed to be double your frame rate. I film in 4k 24fps so I want my shutter speed to be 50, if you film in 4k 30fps, 2k 30fps or 1080p 96fps it'll be different. You want the iso to be 100 and the EV to be 0. BTW ignore any talk of apature(sp?) Since the Mavic is fixed 2.2 I believe. If you could change the apature, you wouldn't need ND filters.