I'm not sure if anyone's posted something similar before but I've been playing around with controlling DSLR's using my iPhone and a remote desktop app today.
iPhone remote for Canon DSLR video | Paul Joy
Quite fiddly, but it's possible to control recording, focus, and camera setting etc in situations where you can't go near the camera.
iPhone remote for Canon DSLR video | Paul Joy
Quite fiddly, but it's possible to control recording, focus, and camera setting etc in situations where you can't go near the camera.