This controller has made my DVX200 so much easier to shoot with. Right from the tripod handle I can zoom, focus and change the iris (and start and stop recording.) There's even little switches to change between manual and auto on both the iris and the focus. And this thing works perfectly every time. Excellent product, and it's built like a tank. I had a similar VariZoom LANC controller that I used with my Sony's for about 6 years with no problems. Excellent quality. I can't imagine shooting without it now.