I'm new to the whole autofocus thing and its different modes, so forgive any ignorance.
I do a lot of hand held run and gun manual focus so the thought of touching a screen with my left hand in the middle of shooting to lock focus strikes me as often impractically disruptive, as does the notion of face tracking ( subject spontaneously turns away, focus goes poof ). I may be wrong but both of these methods would seem less accurate in a run and gun situation than controlling an X cursor on the LCD/viewfinder with a pressure sensitive joystick/rocker on the side handle under my right thumb...which also would work in the VF as opposed to just on the LCD and be more accurate for very narrow DOF focus than any one of my fingers touching a 2.8'' or 5'' lcd.
Maybe this idea is already part of the side handle system?




love it