>> What do you mean here? How would you calibrate a display to D65? D65
>> is a specific spectrum and in current displays you'll have no choice
>> to alter the spectra of the output. A more exact "white point
>> calibration" could be to specify xy-values in contrast to a correlated
>> color temperature (CCT):
> You can't actually calibrate to D65 (any more than you can 6500K).
You can calibrate to a specific correlated color temperature like
6500K, but not to a specific spectrum.
> But when
> a software product offers BOTH options (and many do), I advise users always
> pick the D illuminant setting over a CCT setting.
Ah, now I understand. Calibration products offer both options
sometimes, just because some users know D50/D65 and are looking for
that. A viewing booth often is advertised as a D50 viewing booth, even
when no viewing booth has a real D50 spectrum, but only offers a light
which is close to 5000K CCT.
> We have no idea under the hood what is actually happening here.
I'm pretty sure that choosing D50 or 5000K will make no difference at
all.
> Since we are dealing with CCT, which
> is a range of color versus asking for a specific color (an illuminant), it's
> safer to select that when given the choice.
I understand your opinion now, although I doubt that the different
options Dxx vs. xxxxK will make any difference, because you "just" can
alter the RGB gain of a CRT or alter the internal LUT values of a flat
panel display.
Best regards
Peter
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