Canon EOS-1D X Mark III Advanced User's Manual page 124

Display
* Applicable with Speedlites having a color temperature transmission function. Otherwise, it will be
fixed to approx. 6000K.
Note
To set a personal white balance, select [
registering a personal white balance to the camera, refer to the EOS Utility
Instruction Manual. Up to five personal white balances can be registered using
EOS Utility. Register separate ones for still photos and movies, as needed.
White Balance
The human eye adapts to changes in lighting so that white objects look white under all kinds
of lighting. Digital cameras determine white from the color temperature of lighting and, based
on this, apply image processing to make color tones look natural in your shots.
Mode
Auto: Ambience priority
Auto: White priority
Daylight
Shade
Cloudy, twilight, sunset
Tungsten light
White fluorescent light
When using Flash
Custom
Color temperature
124
Color Temperature (K: Kelvin)
3000–7000
5200
7000
6000
3200
4000
Automatically set*
2000–10000
2500–10000
: PC-*] in step 2. For instructions on
(Approx.)