16
_Color temperature and while balance adjustment (reference)
When carbon is burnt, it develops vari-
ous colors of light depending on the tem-
perature. Natural light can be specified
by color temperature reflecting to the
color developed when carbon is burnt.
The light of 3,200K (K=Kelvin, j273°C
equals to absolute zero temperature OK)
represents the same value (color) as
what develops when carbon is burnt at
3,200K (2,927°C). The relationship be-
tween the color temperature of the light
source and weather condition is indi-
cated in the right figure. Let’s study the
difference of shooting an indoor object
from shooting one outdoors. Studios are
usually lighted with incandescent lamps
and the color temperature of a white
object in a studio is around 3,200K. The
color temperature of a white object out-
doors is around 6,500K. The former may
look a little yellowish while the latter ap-
pears somewhat bluish when they are
shot by a camera. However, the human
eye does not recognize color differences
among these objects even under differ-
ent ambient lighting conditions, because
of their adaptability to light.
The video camera reproduces color differences with high fidelity and the color of an
object somewhat different from what appears to the human eye.
Therefore, there is a need to adjust the white balance in order to correct differences
between color temperatures.
10000K Blue sky
Rainy
Partly cloudy
Cloudy
AWC
Fine
Fluorescent la
m
Halogen lamp
Tangsten lam
p
Candle
9000K
8000K
7000K
6000K
5000K
4000K
3000K
2000K
1000K
How to Adjust
_White balance adjustment
Adjust the white balance after shooting a white object by at least 50% of the screen.
NOTE: If the white signal level is over 100% or less than 50%, the white balance may not
be normally adjusted.
Color temperature outdoors may vary depending on weather conditions.
Color temperature values
NOTE