Nikon D2H manual Fine-Tuning White Balance, Taking Photographs-White, Mired

Taking Photographs—White

Fine-Tuning White Balance

At settings other than (Choose color temp.) and PRE (preset), white balance can be “fine tuned” to compensate for variations in the color of the light source or to introduce a deliberate “warm” or “cold” cast into an image. Higher settings can be used to lend images a bluish tinge or to compensate for light sources with a yellow or red cast, while lowering white balance can make photographs appear slightly more yellow or red or com- pensate for light sources with a blue cast. Adjustments can be made in the range +3 to –3 in increments of one. Except in Fluorescent mode, each increment is equivalent to about 10 mired.

White balance is fine tuned using the White bal. option in the shooting menu or by pressing the WB button and rotating the sub-command dial.

Balance

The White Balance Menu

1 In the white balance menu ( 52), highlight an option other than Choose color temp. or White bal. preset and press the multi selector to the right.

SHOOTING MENU White bal.

Auto

Incandescent

Fluorescent

Direct sunlight

Flash

Cloudy

Shade

2 Press the multi selector up or down to choose the desired value and press the multi selector to the right. The shooting menu will be dis- played.

SHOOTING MENU White bal.

Auto

0 OK

“Mired”

Any given change in color temperature produces a greater difference in color at low color temperatures than it would at higher color temperatures. For example, a change of 100 K produces a much greater change in color at 3000 K than at 6000 K. Mired, calculated by multiplying the inverse of the color temperature by 10 6, is a measure of color temperature that takes such variation into account, and as such is the unit used in color-temperature compensation filters. E.g.:

•4000 K – 3000 K (a difference of 1000 K) = 83 mired

•7000 K – 6000 K (a difference of 1000 K) = 24 mired

54