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Newbie Question: 2 different monitor gamut question
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Newbie Question: 2 different monitor gamut question


  • Subject: Newbie Question: 2 different monitor gamut question
  • From: Andrea Prosperi <email@hidden>
  • Date: Sat, 2 Dec 2006 23:30:26 +0100

I hope there is someone here that can help me to understand a strange behaviour I cannot explain.
I have an Ibook G4 connected to an external (very old) CRT Philips display and I calibrated internal LCD and external CRT using Spyder2Pro.
Giving a look inside the ColorSync Utility I can see that the CRT Display has a wider gamut compared to the internal LCD except for the deep blue.
As far as I know, a photo taken into the Adobe RGB colorspace should be fitted into my display colorspaces using perceptual intent so a deep blue sky should be represented less deeper on CRT than on LCD. So far so good and everything works like expected (please correct me if I miss something): if I move the entire image from the LCD monitor to the other one I can see a changes in blues . But here is the problem: If I open my deep blue image inside Preview, and I keep the windows across the two monitors with the first 2/3 of the window on the internal LCD and the remaining 1/3 of the window on the external CRT, the CMM system apply on the entire window the color profile selected for the monitor in which the most part of the window is displayed (in this case LCD monitor). Curiously in this situation deep blues on the internal LCD and external CRT matches perfectly and this means, I suppose, that the CRT monitor is able to display so deeper blues. If this is correct I cannot understand what's wrong with calibration and why my ICC profile doesn't match real capabilities of my monitor.
Can you please help me to explain this issue?


Regards,

Andrea
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