Canon Speedlite 470EX-AI Instruction Manual page 101

Bounce Flash Photography
The flash head moves on its own.
When Speedlite is first started and the shutter button on the camera
is pressed halfway with the flash head in a position other than the
forward-facing (0°) position, the flash head automatically moves to
the forward-facing (0°) position.
The AI bounce flash function is activated. When you do not want to
use the AI bounce flash function, set the <X> switch to the <0°>
position (p.42).
When the position of the flash head changes after you press the
<z> button and store (register) the bounce angle in the
Speedlite, pressing the camera's shutter button halfway returns the
flash head to the registered position.
"AI.B " is displayed. / The flash head does not move.
When Speedlite is not attached to the camera, the "AI.B "
animation is displayed and the flash head's AI bounce flash
operation is not performed.
When the orientation (position) of the camera has changed, double-
clicking the shutter button (pressing the shutter button halfway two
times in a row within a short period) activates the bounce angle
correction.
In AI.B full-auto mode, the flash head does not move even
when I press the camera's depth-of-field preview button.
Check whether or not the camera's depth-of-field preview button
functions as an AI.B full-auto distance measurement start button (p.46).
The modeling flash fires when the camera's
depth-of-field preview button is pressed.
Check whether or not the camera's depth-of-field preview button
functions as an AI.B full-auto distance measurement start button
(p.38, 46, 85).
Troubleshooting Guide
101