Hi all
I need a little bit help from the color experts here. A couple of days I retired my CG277 and replaced it with a CG318-4K display. A truly wunderfull screen.
Now, I have some serious calibration issues which resulted in a warranty exchange from EIZO. The replacement screen still has the same issue and EIZO tries to give me a workaround instead of fixing the hardware. But let me describe the problem.
When calibrating the CG318 with the internal sensor to a specific white point (x,y) e.g. 5500k, I get a serious magenta tint in greys and whites.
Compared to my other CG277 and CG276 (internal sensor calibrated) and to proof prints on neutral Tecco PM230 paper, the CG318 clearly shows grey tones and colors tinted to magenta.
When calibrating the CG318 with my Color Munki Photo using ColorNavigator software, the result is quite decent and fits to the other 2 EIZO screens and the proof prints.
--> Result of my tests: Calibrating the CG277, CG276, CG318 and a cheap Dell Ultra Sharp to the same target whitepoint, using the ColorMunki for the Dell and the internal sensors of the CGs, all screens locks very similar except of the CG318. On the CG318 greys and colors will have a clear magenta tint.
--> With my understanding of colors, color management and measurement devices, I would clearly say, the internal sensor has a wrong reference calibration.
As this is already my 2nd CG318, EIZO likes for push me for a workaround. So here is what they suggested me today on the phone:
Correlate the built in sensor to an external sensor e.g. my ColorMunki Photo
Use the manual adjustment of the white point. Place the CG277 and CG318 next to each other and manually chance the white point on the CG318 until it fits to the CG277 and use this as target.
Use the ColorMunki photo to measure the paper white (I have norm light) of the target paper and use this as calibration white point target (x,y). Continue the display calibration with the ColorMunki and just do not use the internal sensor.
All these tips a nice, and they all give me decent results. But still, the internal sensor either can not be used, or I need to do a sensor correlation, which is IMO pretty odd to by a 5000$ monitor with a build in calibration sensor, which can not be used due to a obvious miss alignment.
What would you suggest? Should I push EIZO to a another replacement? Should I just use the sensor correlation and live with that (results here are good and the colors are correct with this method) or is my expectation just to high and it is common that sensors can have such a miss alignment and need to be correlated to and external device?
And by the way, does ColorMunki Photo need a recalibration of it's sensor from time to time? Should I contact Xrite and ask if they offer something like that? The Munki is alredy 5 years old and I always have the feeling, my displays have a slite yellowish tint when using the ColorMunki for calibration. OR, should I buy the X-rite i1 Pro2 Spectrophotometer suite which include printer profiling and use this photometer als calibration reference for all screens (we have 3 workplaces) and printers?