The folks at onOne Software designed an app for the iPhone and iPod touch that can control your tethered Canon or Nikon DSLR remotely. I decided to install the Lite version of the program and give it a quick try. Only a slight delay from when I hit “fire” on the app to when the camera actually fires (the time it took for my thumb to raise back up off of the phone after pressing the button).
For anyone interested, this is the lighting setup I had for this shot:
