Canon PowerShot S400 Digital Elph User Manual page 77

.................................................................... Shooting 175
• Aim the camera so that a piece of white
paper, a cloth or a gray card completely
fills the frame at the center of the LCD
monitor or the entire optical viewfinder,
then press the SETbutton. The camera
reads the white balance data when you
press the SETbutton.
• You can shoot right after setting the
white balance. The menu displays again
after the shot, allowing you to change
the settings easily.
and the exposure compensation setting to zero (+0) before
setting a custom white balance. The correct white balance
may not be obtained when the exposure setting is incorrect
(image appears completely black or white).
It is also advisable to use the LCD monitor to compose the
shot and to zoom in to the telephoto end setting.
Since the white balance data cannot be read in c_ mode,
preset the white balance in another shooting mode first
before selecting the _ mode.
Set the flash on or off when setting a custom white balance.
The white balance may not be accurate if the setting
conditions and shooting conditions are not the same.
If the flash fires when setting a custom white balance with
the flash set to [] or I_ ensure that you also use the flash
when you go to shoot.