Hello Folks--
Deciding it was time to upgrade from my creaky LaCie 22Ó crt, I have just popped for a NEC PA271W-BK-SV. And managed to greatly overstep both my skill level and budget. I have been using Photoshop, shooting RAW and Adobe RGB.

aRGB is not one of the gamuts offered in NEC's start-up auto-calibration window (Spectraview II, version 1.1.09; build 111001), so for the time being IÕve settled for sRGB. But some of the calbrated numbers seem to differ significantly. With only a very limited understanding of gamut, though, I could be wrong. For example, five calibrations, done over a 90-minute period, produced these results: (ambient light luminance was 8 lux, color temp 2900K.) I am using a MacBook 15", connected to the monitor via Apple's mini-display port and NECÕs USB cable.

#1. white pt: 6543; dE: .36; luminance: .31 cd/m, intensity: 259.6 cd/m; gamma: 2.2; colors: R=.640, .330; G= .300, .600; B= .150, .060; contrast ratio: 842.1; color tracking: grayscale dE= avg .55, max .83; incl dark values: avg .68, max 1.43

#2. white pt: 6507; dE: .11; luminance: .34 cd/m, intensity: 334.0 cd/m; gamma: 2.2; colors: R=.640, .330; G= .300, .600; B= .150, .060; contrast ratio: 971.1; color tracking: grayscale dE= avg .54, max .80; incl dark values: avg .65, max 1.42

#3. white pt: 6591; dE: 1.92; luminance: .33 cd/m, intensity: 254.3 cd/m; gamma: 2.2; colors: R=.640, .330; G= .300, .600; B= .150, .060; contrast ratio: 842.1; color tracking: grayscale dE= avg 1.60, max 1.92; incl dark values: avg 1.56, max 1.92

#4. white pt: 6514; dE: .46; luminance: .33 cd/m, intensity: 338.3 cd/m; gamma: 2.2; colors: R=.640, .330; G= .300, .600; B= .150, .060; contrast ratio: 1019.1; color tracking: grayscale dE= avg ..69, max .90; incl dark values: avg .76, max 1.24

#5. white pt: 6496; dE: .63; luminance: .34 cd/m, intensity: 335.7 cd/m; gamma: 2.2; colors: R=.640, .330; G= .300, .600; B= .150, .060; contrast ratio: 998.1; color tracking: grayscale dE= avg .67, max .88; incl dark values: avg .75, max 1.18.

The numbers out of step are dE and contrast ratio, and #3Õs color tracking. (In their tests, TFTCentral shows a range of 500-600 for contrast, but those numbers are about two years old.)

SoÑare these shifts ÒnormalÓ Ðwhat one might expect--or is something else going on?

Last question: Where do I find the calibration for aRGB? Would that be done manually?
Many thanks for any advice you can give me! John

Adobe RGB, sRGB, ProPhoto RGB are working color spaces, they have nothing to do with your monitor profiling.

This PDF I wrote many years ago, still contains some good information: http://www.fredmiranda.com/forum/WGuidelines.pdf

Use Google for some more information.

Hendrik: Many thanks for your point re monitor profiling and link to your pdf!

Thanks, added to ibooks for later reading.