The shutter was fired remotely by myself.
Between my hands is a transmitter/controller which controls the helicopter and also operates the camera tilt and shutter.
The shutter is activated from the upper right hand toggle switch on the top of the controller. This transmits a signal to another onboard switch which in turn shorts two N3 pins to fire the 20D.
Works like a charm!
"How many cameras have you lost or broken? Seriously?"
I submerged a 300D a few years ago in a lake after I came up 25ft short.
(User error after letting the voltage get too low with our old school NiMH main packs)
"and now I can see that you really trust that helicam flying over your head!"
My head.....yes.
However, for safety considerations we do not fly directly over people.