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Archive 2012 · i1 Display Pro - two copies compared, SHOCKING findings!
  
 
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p.1 #1 · p.1 #1 · i1 Display Pro - two copies compared, SHOCKING findings!


Chagrined to report extreme copy variance:

(oscillations split to .0005 between, otherwise left to 3 decimals with added insignificant extra 0)

copy1/copy2 sRGB 120 cd/m^2 NEC PA 241W:
WP .3130/.3135, .3300,.3300, 118.07/118.55
R .6400/.6405, .3290/.3285, 24.66/24.74
G .3005/.3000, .5995/.6000, 85.20/85.40
B .1520/.1520, .0605/.0610, 8.63/8.65

copy1/copy 2 Native 120 cd/m^2 NEC PA 241W:
WP .3140/.3140, .3280/.3280, 119.00/118.90
R .6790/.6790, .3080/.3080, 30.63/30.59
G .2075/.2075, .6925/.6925, 80.45/80.46
B .1520/.1520, .0530/.0535, 7.88/7.89



Granted it is only a sample size of two, however, I sure don't see ANY signs for copy to copy worry so my results fits in fine with Dry Creek's larger sample finding that the copy to copy variation is VERY low. LOOKS GREAT, at least far as copy to copy variation goes. (too bad the accuracy is 350dE off though kidding, it appears likely that it may be better than DTP94b, i1 Pro or custom NEC i1D2!).

I will post standard gamut HDTV results later.

Edited on Jan 25, 2012 at 02:35 AM · View previous versions



Jan 25, 2012 at 02:23 AM
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p.1 #2 · p.1 #2 · i1 Display Pro - two copies compared, SHOCKING findings!


actually the results are shocking since that is some nice (lack of) copy to copy variation indeed between those two copies



Jan 25, 2012 at 02:24 AM
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p.1 #3 · p.1 #3 · i1 Display Pro - two copies compared, SHOCKING findings!


Fairly similar story on standard gamut, not quite the same, but differences probably not larger than 1dE, although some do seem to be that large.

Neither thinks the calibration had too little blue as every other probe did. I actually suspect all the others may be wrong.



Jan 25, 2012 at 07:15 AM
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p.1 #4 · p.1 #4 · i1 Display Pro - two copies compared, SHOCKING findings!


the i1 Display Pro do appear to drift a bit with time, white point x and y readings both grow a bit lower over time, over 40 minutes of continuous reads they drop a good .002, which is noticeable. I'm not quite sure but I think after about 10-12 minutes of warming reading it is a bit more accurate than when fresh or than when having been used for an hour.



Jan 25, 2012 at 07:25 AM
 

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p.1 #5 · p.1 #5 · i1 Display Pro - two copies compared, SHOCKING findings!


Units tested are from same 11/2010 box batch and differ by 2000 serial unit numbers, if it matters.



Jan 25, 2012 at 07:34 AM
Ruahrc
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p.1 #6 · p.1 #6 · i1 Display Pro - two copies compared, SHOCKING findings!


Did they fix the software "problem" where you cannot use the RGB controls on your monitor to fine tune the WB, or is that still present?

Seems like you'd get better results by tuning the hardware of the monitor rather than relying on the software calibration curves to compensate for WB differences?

This is one major thing which keeps me from upgrading from my i1D2.



Jan 25, 2012 at 10:51 PM
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p.1 #7 · p.1 #7 · i1 Display Pro - two copies compared, SHOCKING findings!


I suppose the drift as it gets used more might be a potential concern, the old DTP94b and i1Pro could be re-calibrated for warm-up during usage.
Without a reference probe it's hard to know if it's best readings are from when it's cold, warm or hot. Not sure at what amount of warm-up the drift stops.
I will test i1 Pro, i1 Display pro, i1D2 and DTP94b over a 1.5hours and see how each drifts and see what happens when i1 Pro and DTP94b are re-warmth calibrated in use.

(the two copies I compared above, were always compared at pretty close to the same amount of warm-up time on each)



Jan 26, 2012 at 12:07 AM
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p.1 #8 · p.1 #8 · i1 Display Pro - two copies compared, SHOCKING findings!


Ruahrc wrote:
Did they fix the software "problem" where you cannot use the RGB controls on your monitor to fine tune the WB, or is that still present?

Seems like you'd get better results by tuning the hardware of the monitor rather than relying on the software calibration curves to compensate for WB differences?

This is one major thing which keeps me from upgrading from my i1D2.


I'm not sure. I actually haven't used the x-rite software yet. I only used it with Spectracal HDTV Calibration and NEC's Spectraview II so far.

With some monitors you would do better adjusting the RGB controls, with others, they have such a poor messed up color engine that touching the controls makes the profile worse in the end.



Jan 26, 2012 at 12:08 AM





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