Today Fotodiox has released a really fancy USB follow focus for Canon, products like this make the Nikon fanboy inside me really jealous. Other follow focus systems have been available but they were basic in the way that they just changed focus. The Aputure V-Control has the ability to not only control focus with its slick dial but also change modes, gives you total exposure control (shutter,ISO and aperture), four focus point presets in video mode, lcd display for settings and total live view control.
