Re: Monitor Calibration
Re: Monitor Calibration
- Subject: Re: Monitor Calibration
- From: email@hidden
- Date: Tue, 12 Dec 2000 19:23:37 EST
In a message dated 12/12/00 2:33:50 PM, email@hidden writes:
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>Most have experienced dingy yellow monitors not because of the white
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>point being calibrated to 5000K but because the luminance level is reduced
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>to an unacceptable level when compared to a light box. I have had excellent
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>results with 5000K white point and 100cd/m2 level.
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Well then, this begs the question of what the appropriate luminance level
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should be. It was never much of a concern before, since most of us were
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probably fighting for every lumen we could get on our calibrated
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monitors. I know that as mine aged I was continually shrinking the
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screen dimension to keep it's head above the 75 cd/m2 PressView minimum
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standard.
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But now I have a new Sony GDM-F500R, a DTP 92USB, and Pre/OptiCal, and
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even with the screen dimensions to-the-max (about a 1/4" border), when
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the red gun is run at 100% for the PreCal settings, my final luminance
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is
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around 110 cd/m2 at D50. If I do the same for D65, I end up in the 125
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cd/m2 range. Right now my red gun is running at 85% to give me a
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luminance of 90 cd/m2 at D65. Why 90 cd/m2? Because Bruce recommended
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85 cd/m2 and I just couldn't bring myself to drop it that low. So what
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is the best setting?
ColorVision suggests 85 to 95 cd/m2, and I have calibrated countless monitors
to that range, favoring the lower end unless they are in excessively bright
locations; why can't you bring yourself to run it at that level? It will
certainly preserve monitor life to not run it any hotter than necessary.
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A second question would be: How (and where) should you set the luminance?
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What I've been doing in PreCal/Optical is to fiddle with the gun levels
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in PreCal to get luminance level I'm looking for BEFORE running OptiCal.
OptiCal and PhotoCal do not currently agree on the recommended location for
setting luminence, but I set it at the PreCal gun setting stage with both
programs anyway, and it works fine.
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So now, if I check my monitor settings, my gains are set to 85/75/75%,
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and brightness/contrast are at 49/99%. Now I realize that these numbers
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are meaningful only to my monitor setup, but I can also calibrate to the
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same color temperature and luminance by setting the gains at 100/90/90%
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in PreCal and arriving at a different brightness/contrast setting in
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OptiCal - 34/90% let's say. So what IS the best way, and what IS the
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most appropriate luminance when dealing with these modern, bright
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monitors?
When the world eventually migrates to *profilable* LCD displays, increased
brightness may not be as much of an issue, but currently I use the PreCal
controls by preference...
C. David Tobie
Design Cooperative
email@hidden