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Author Topic: Two copies of i1 Display Pro compared  (Read 4507 times)

WombatHorror

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Two copies of i1 Display Pro compared
« on: January 24, 2012, 09:21:01 PM »

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

 ;) ;D :D :o

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  ;) :D 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.
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WombatHorror

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Re: Two copies of i1 Display Pro compared
« Reply #1 on: January 25, 2012, 02:26:20 AM »

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.
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WombatHorror

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Re: Two copies of i1 Display Pro compared
« Reply #2 on: January 25, 2012, 02:29:02 AM »

The two also seem to match fairly well on a standard gamut screen. They don't read quite the same, but pretty close, I think they are often about .5dE apart and sometimes a solid full 1dE apart, but still that's pretty close. The difference between the two was clearly less than the difference between either any the readings of my i1Pro, i1D2 and DTP94b. I think the difference between the DTP94b was slightly bigger than between the two i1 Display Pros.
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WombatHorror

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Re: Two copies of i1 Display Pro compared
« Reply #3 on: January 25, 2012, 02:33:01 AM »

It turns out both are from the same 11/2010 batch (didn't this not come out until mid-2011??) anyway that is what the boxes on each say and the serial numbers are about 2000 apart. If that means anything at all.
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WombatHorror

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Re: Two copies of i1 Display Pro compared
« Reply #4 on: January 25, 2012, 06:54:36 PM »

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)
« Last Edit: January 25, 2012, 07:07:07 PM by WombatHorror »
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goran

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Re: Two copies of i1 Display Pro compared
« Reply #5 on: February 03, 2012, 03:27:20 PM »

Maybe this "i1 dilplay pro" is the one possible (and not so expensive) answer to my post here.
 ::)

How good is it for measuring white point from a paper ? ???

I will use it with my brand new Eizo CG245w.

/goran
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WombatHorror

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Re: Two copies of i1 Display Pro compared
« Reply #6 on: February 03, 2012, 04:07:00 PM »

Maybe this "i1 dilplay pro" is the one possible (and not so expensive) answer to my post here.
 ::)

How good is it for measuring white point from a paper ? ???

I will use it with my brand new Eizo CG245w.

/goran

I'm pretty sure you can only use it with self-luminous objects so I don't think you can use it to measure paper white point. I haven't tried it yet but it can measure ambient light white point.
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goran

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Re: Two copies of i1 Display Pro compared
« Reply #7 on: February 04, 2012, 03:15:06 AM »

That will be fine !

I am not interested in the paper color.
I hope the printing paper is rather neutral (Epson Archiva Matte).

I will order one "i1 Display Pro" and test it.

Thank You.

/goran
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shewhorn

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Re: Two copies of i1 Display Pro compared
« Reply #8 on: February 06, 2012, 12:20:01 PM »

Maybe this "i1 dilplay pro" is the one possible (and not so expensive) answer to my post here.
 ::)

How good is it for measuring white point from a paper ? ???

I have an Eye One Pro UV cut, Eye One Pro without UV cut and an i1Display Pro (as well as a few other instruments). My experience is that none of these tools which measure paper white in your viewing booth work very well at all. The resulting color temperature has always been too warm. A visual match IMO, is the way to go.

Cheers, Joe
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goran

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Re: Two copies of i1 Display Pro compared
« Reply #9 on: February 07, 2012, 06:42:42 AM »

That is what I have expected.

And that is why I said:
"The Very Best ambient light meter to an Eizo CG 245W"
in my (unanswered  :'() post here.

I do have one i1 display pro on order so I will see for myself.
Maybe I also will try something else (very much more expensive I suspect!) .

It is strange I think with all this monitor calibration stuff if it can't count in the viewing-light.

After all the one and only thing the monitor is for is to show how the imige will print on paper. Period !
 ;D

/Goran
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