Dear Keith and Roger,
>> Since any calibration is potentially only as good as the sensor you use,
>> could I just assume that since the Eye One Pro is much more expensive it's
>> any better?
> Not necessarily.
I second Rogers observations. I also found siginificant difference
between several EyeOne Pro Revisions. If you're in doubt a check at
X-Rite might be a good idea.
A spectrophotometer is not necessarily better (means more accurate or
precise) then a colorimeter. You can buy cheap spectros (and the
EyeOne is relative cheap) or high-end colorimeters like the one from
the german LMT (around 20000 Euro) and you can guess which one is more
accurate... :-)
I personally have good success with the DTP94 on standard gamut (up to
around 75% NTSC) displays.
> As for what is best, when in doubt, I always fall back on the
> practice of trusting my eye to a visual reference, like the
> ColorChecker chart. Comparing a digital version of the chart, in
> Photoshop, to a real, physical version under a controlled lighting
> says a lot about the quality of the whole chain.
A visual test is always a good idea. In the end the visual appearance
and not the numbers count! (pun intended ;-)
I take a look on the ColorChecker from time to time too, but I think
that's a "professional" test especially good for relative comparisons
between different displays. This is mainly a test regarding the color
gamut. Another often used practice is to take a look on a gray ramp.
This can (and in real world cases normally will) reveal the slightest
problems in calibration and therefore the measurement device.
www.quato.de/software/quatotools.zip
has some artificial gray ramps and a short manual how to use them
best.
In general one has to be aware if a test image is viewed in a
colormanaged application which honors the monitor profile (like
Photoshop) or if you view the file without colormanagement (like in
Firefox or as a non-tagged file when viewed on the XP or OS X desktop.
A test file to check if the monitor profile is honored by a specific
application is included too.
Last not least a good proof in a viewing booth compared to the
softproof in Photoshop is always very interesting to see.
Best regards
Peter Karp
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