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A White Balance Fine Tuning
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