Nikon 25235 User Manual - Page 47

Reference-White Balance Fine-Tuning White Balance At settings other than (Choose Color Temp.) and PRE (White Balance 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 compensate 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 Balance option in the shooting menu or by pressing the WB button and rotating the sub-command dial. At settings other than ±0, a icon appears in the control panel. The White Balance Menu Selecting an option other than Choose Color Temp. or White Balance Preset in the white balance menu ( 35) displays the menu shown at right. 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 displayed. The WB Button Press the WB button and rotate the sub-command dial until the desired value is displayed. 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 1000 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 37