Hi I have the Camera and it seems to have an ND setting as well as negative gain, and you can close the f-stop let's face it, doesn't matter that much since wide open f1.8 doesn't look like FF 5d shot at 2.8 anyway.
it's a nice camera, not as clean as a 5d in dark areas but with all the audio items and auto-focus and remote control it's a nice system... for 3k I think it's a bargin...