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A White Balance Fine-Tuning
If white balance has been fine-tuned, an asterisk (“E”) will be displayed
next to the white balance setting. Note that the colors on the fine-
tuning axes are relative, not absolute. For example, moving the cursor
to B (blue) when a “warm” setting such as J (Incandescent) is selected
for white balance will make photographs slightly “colder” but will not
actually make them blue.
A “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
A See Also
For information on varying white balance to “bracket” the current
value, see “Bracketing” (0 215).
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