Nikon D5000 Руководство - Страница 28

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WHITE BALANCE AND THE TEMPERATURE OF COLOR

When you select different white balances in your camera, you will notice that underneath

several of the choices is a number, e.g., 5200K, 7000K, or 3200K. These numbers refer

to the Kelvin temperature of the colors in the visible spectrum. The visible spectrum is

the range of light that the human eye can see (think of a rainbow or the color bands that

come out of a spectrum). The visible spectrum of light has been placed into a scale called

the Kelvin temperature scale, which identiﬁ es the thermodynamic temperature of a given

color of light. Put simply, reds and yellows are "warm" and greens and blues are "cool."

Even more confusing can be the actual temperature ratings. Warm temperatures are typi-

cally lower on the Kelvin scale, ranging from 3000 degrees to 5000 degrees, while cool

temperatures run from 5500 degrees to around 10000 degrees. Take a look at this list for

an example of Kelvin temperature properties.

KELVIN TEMPERATURE PROPERTIES

Flames

Incandescent bulb

White ﬂ uorescent

Moonlight

The most important thing to remember here is how the color temperature of light will

affect the look of your images. If something is "warm," it will look reddish-yellow, and if

something is "cool," it will have a bluish cast.

7. SET YOUR COLOR SPACE

The color space deals with how your images will ultimately be used. It is basically a

set of instructions that tells your camera how to deﬁ ne the colors in your image and

then output them to the device of your choice, be it your monitor or a printer. Your

camera has a choice of two color spaces: sRGB and Adobe RGB.

The ﬁ rst choice, sRGB, was developed by Hewlett-Packard and Microsoft as a way

of deﬁ ning colors for the Internet. This space was created to deal with the way that

computer monitors actually display images using red, green, and blue (RGB) colors.

1700K–1900K

2800K–3300K

4000K

Daylight

5000K

Camera ﬂ ash

5500K

Overcast sky

6000K

Open shade

7000K

C H A P T E R 1 : T H E D 5 0 0 0 T O P T E N L I S T