|2||FOCUS||short to pin 3 to focus Canon camera|
|1||SHUTTER||short to pin 3 to trigger shutter|
If the camera is in stand-by mode, there is a 3.3V voltage present at the focus wire. The camera can be waken up from stand-by by connecting the focus wire to ground. The trigger inputs can serve as power supply for circuits with a supply current of less than 30µA.