I am shooting at 1080i/30fps and lately I've been getting some noise, even when I open up the iris and mess around with the filter and gain. The hair and clothing are the noisiest. Can someone tell me exactly what setting is the best for the HVX200 for green screen? I want to get the least noisy shot as possible. I know lighting is a big factor, but considering my lighting is set up right, what settings on the camera should it be on? Also should I have it on F5, F6, or something else? Thanks!