Datacolor User to User Support Group.

On Aug 10, 2009, at 2:52 PM, Rollin wrote:

> I have two monitors on the system running off a single video card  
> and use the WinColor app to load the profiles.  One is the Eizo  
> CG222W and the other is a Dell 1905FP.  The Dell is a simple backlit  
> flat panel.  I use the Eizo as my main (color managed) screen for  
> soft proofing under Photoshop and use the Dell as a secondary  
> monitor to park the various tool menus under PS as it is not the  
> best thing in the world for color managed applications.
>
> So, from mu perspective, there is no "non-problematic" monitor.  I  
> just ran calibration using the Spyder3 software on both monitors and  
> then took readings using the Spyder3 Colorimeter option under the  
> Tools menu.
>
> Dell
> 6567K
> 98.877L, -3.027a, -19.424b
>
> Eizo
> 6534K
> Lab = 89.805L, -2.7629a, -17.590b

Excellent match for whitepoint, a* and b*; L* is the one thats off. Be  
sure to use the Colorimeter window while at the SpyderProof screen;  
toggle calibration on and off, and measure both ways, to see what the  
native color is, and what you get once the calibration is loaded.
>
> Visually, the Eizo appears to have a green caste.  When I display  
> the same image on both monitors, the Eizo loooks "warmer" and, if  
> there is green in the image, it seems to really make it pop where as  
> the Dell appears "cooler" and the blues look stronger on
>
> I find it hard to believe that a difference of 33 degrees Kelvin in  
> color tempature can make that kind of difference.

It can't. Its most likely a luminance difference, or a calibration  
issue. Are you sure that each display is getting the proper  
calibration loaded, not just one calibration loaded to both displays?

>  I did check the luminance on the two and there is a major  
> difference: The Eizo has 0.26 for black and 75.4 for white while the  
> Dell has 0.37 and 96.5 respectively.

You problaby don't want to weaken your Eizo black to match hour Dell  
(if you even have a control to do so), but you definately want to get  
the white luminances closer...
>
> Something is not right but I have no idea at this point what it is  
> or how to go about resolving it.  As it stands now, I have serious  
> doubts about the Spyder3 software and/or colorimter. If I understand  
> your response to my posts, there is no way I can really check the  
> colorimeter except to try to decide if it is right by visually  
> looking at some images and trying to decide if they are good or bad.

Start by matching the white luminances, then move on to checking the  
Colorimeter results again with calibration on and off.
>
> I do remember that there were other people on this forum that have  
> an Eizo monitor.  I would be interested in any experiences they  
> might share when it comes to getting the Eizo ColorNavigator and the  
> DataColor Sypder3 (Elite) packages working together.

If you have your Eizo set to an appropriate gamma and whitepoint in  
advance, then calibrating it on top of that with Spyder3 should be fine.

C. David Tobie
Global Product Technology Manager
Digital Imaging & Home Theater
CDTobie@...