commands affect the shutter. For more information concerning the pinouts and electrical specifications of the trigger port, and how they relate to the shutter commands, refer to your camera’s User Manual.
shutter_open( );
This function opens the camera shutter. Once the shutter_open_delay time has passed, this function continues on to the next script instruction. See shutter_close for more information. For more information concerning the pinouts and electrical specifications of the trigger port, and how they relate to the shutter commands, refer to your camera’s User Manual.
12Advanced Camera Operation Manual