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ADJUSTMENT
Color temperature and adjustment of white balance
When carbon is burnt, it develops various colors of light
depending on the temperature. Natural light can be spec-
ified by color temperature referring to the color developed
when carbon is burnt.
The light of 3,200K (K=Kelvin, -273C equals to absolute
zero temperature 0K) represents the same value (color) as
what develops when carbon is burnt at 3,200K (2,927C).
The relationship between the color temperature of the light
source and weather condition is indicated in the right fig-
ure. Let’s study the difference of shooting an indoor object
from shooting one outdoors. Studio are usually lighted
with incandescent lamps and the color temperature of a
white object in a studio is around 3,000K. The color tem-
perature of a white object outdoors is around 6,500K. The
former may look a little yellowish while the latter appears
somewhat bluish when they are shot by a camera.
However, human eyes do not recognize the color differ-
ence between these objects even under different 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 eyes.
Therefore, there is a need to adjust the white balance in
order to correct their differences of color temperature.
NOTE: Color temperature outdoors may vary depending
on weather conditions.
Blue sky
Cloudy
AWC
Rainy
Partly cloudy
Fluorescent
lamp
Fine
Halogen lamp
Tangsten
lamp
Candle
ATW