I own both cameras. What can I do / How to do it: My HDC TM 700 doesn't have manual ND Filters like the HVX. Can I add filters in gradients to duplicate ND filter like response. If filters can replicate, then which ones should I get? The HDC TM 700 has full manual control (focus, white balance, Iris (Gain is added in after Iris can't be opened anymore with Iris control), Shutter. I want to keep the Iris in the sweet spot for Clear HD (f1.2 - f5.6)