There is IOS DSLR camera control where we can use the phone to preview on screen and control the Camera from there.Unfortunately this application was practically not available but today it launched for the users.
DSLR Controller is in beta for now, whatever but it has amazing. The application allows you to control the camera i.e. Canon EOS (550D, 50D, 7D, 5D mk II, and 1D mk IV) from the Android phone , connected through USB port version available to them. see the video control options such as aperture, exposure, white balance, ISO , etc.. The refresh rate is 15 frames per second, even a little low, but hopefully in the final version is better.
The only drawback is that only work with devices that have USB Host as the Samsung S2 Galaxy tablets or Honeycomb. We see that presents options and if the final video is as versatile as photos can be a very good combination: Camera DSLR Tablet Honeycomb and Controller.







