Canon EOS 5D Mark III Instruction Manual (en)

 White Balance CorrectionN
With just one shot, three images having a different color balance can be 
recorded simultaneously. Based on the color temperature of the current white 
balance setting, the image will be bracketed with a blue/amber bias or 
magenta/green bias. This is called white balance bracketing (WB-BKT). White 
balance bracketing is possible up to ±3 levels in single-level increments.
Set the white balance bracketing amount.
In step 2 for white balance correction, 
when you turn the <5> dial, the “ ” 
mark on the screen will change to “     ” 
(3 points). Turning the dial to the right 
sets the B/A bracketing, and turning it to 
the left sets the M/G bracketing.
On the right, “Bracket” indicates the 
bracketing direction and correction amount.
Pressing the <L> button will cancel 
all the [WB Shift/Bkt.] settings.
Press <
0> to exit the setting and 
return to the menu.
Bracketing Sequence
The images will be bracketed in the following sequence: 1. Standard 
white balance, 2. Blue (B) bias, and 3. Amber (A) bias, or 1. Standard 
white balance, 2. Magenta (M) bias, and 3. Green (G) bias.
White Balance Auto Bracketing
B/A bias ±3 levels
During WB bracketing, the maximum burst for continuous shooting will 
be lower and the number of possible shots will also decrease to approx. 
one-third the normal number.
You can also set white balance correction and AEB together with white 
balance bracketing. If you set AEB in combination with white balance 
bracketing, a total of nine images will be recorded for a single shot.
Since three images are recorded for one shot, the card will take longer to record the shot.
When white balance bracketing is set, the white balance icon will blink.
You can change the number of shots for white balance bracketing (p.322).
BKT” stands for bracketing.