Canon Speedlite 470EX-AI Instruction Manual page 58

V AI.B Semi-Auto Shooting
When the shooting distance to the subject changes, adjust (reset) the
bounce angle. When you want to re-register the adjusted bounce angle,
press the <z> button once again. Note that when the shutter button
is pressed halfway without pressing the <z> button once again, the
bounce angle is set to the original value.
If the position of the flash head is moved (inadvertently) after the bounce
angle is stored (registered) in the Speedlite (with the AI.B lamp blinking),
when you press the shutter button halfway, the flash head automatically
moves and is set in the position at the time of registration. (The bounce
angle is automatically corrected.)
When a picture is taken during automatic correction of the bounce angle,
the flash does not fire.
When using the FE lock or self-timer, double-click the shutter button, and
once the flash head is reset (automatic correction) to the stored
(registered) position, perform the FE lock operation or shooting.
When the <X> is switched to another mode or when the power switch
is set to <J>, the bounce angle stored (registered) in the Speedlite is
cleared.
When you turn the flash head, turn it slowly. While it may make a sound
when you turn the flash head, it is not a malfunction. However, it may
result in a mechanical failure if you continuously turn the flash head fast.
When the Speedlite's LCD panel displays a warning, see page 52.
During AI.B semi-auto shooting, you can fire the flash at the desired
bounce angle as in manual bounce flash photography by pressing the
<z> button after determining the orientation (position) of the camera
and adjusting the flash head.
You can select the method to perform the automatic bounce angle
correction (P.Fn-08, p.91).
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