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The advantage with ND filters is that you "trick" the camera into thinking it's darker outside. Like putting sunglasses on the Mavic. The end result is that it forces the camera to use slower (longer) shutter speeds. You will not appreciate the differences shooting stills, but when shooting video, the slower shutter speeds help to reduce the shutter "strobing" effect when shooting in bright light conditions. The end result of THAT will be smoother looking video shots. As I mentioned earlier tho ... you will not see too much difference in your stills. The only exception to that would be if you use a polarizer filter, which will affect colour quality of both your stills AND video shots. Hope this helps!