Grayscale, color fidelity, saturation and gamut to factory settings
Let me start with some good news, my UPRtek MK550T is back from Taiwan and has been repaired and calibrated accordingly. All the measurements you’re about to see were taken with the MK550T only. I just wanted to make sure I was measuring as accurately as possible. With an EIZO monitor, it gets too specific, as they really put a lot of work into calibrating their monitors. Today it’s about maximum accuracy.
First of all, an important piece of information, because I have deactivated the monitor’s ambient sensor and ECO mode. I always do this to create better comparability. I will come back to the topic of ECO mode later.
Color space coverage
If you use the user mode in the OSD, you get slightly more than sRGB, but only slightly more in the red area. It is already unmistakably clear for what purpose this monitor is intended: Office in the sRGB color space.
Gray Scale, Saturation, ColorChecker @ Default Settings – Target: sRGB; D65; Gamma 2.2 (10 % APL)
Gray Scale, Saturation, ColorChecker @ OSD sRGB Mode (10 % APL)
Gray Scale, Saturation, ColorChecker @ OSD Movie-Mode – Target: DCI-P3; D65; Gamma 2.2 (10 % APL)
Interim conclusion
Even in default mode, you get good sRGB color fidelity, which is basically only not quite perfect because the color space coverage here is around 90 percent DCI-P3. This ultimately has a particular effect on the yellow and red colors. At the same time, the 90 percent P3 also means the limit in terms of color space coverage. In other words, if you really want a lot of P3 or Adobe RGB, you won’t find it here.
If you switch to sRGB mode, you get an extremely good calibration. The avg. DeltaE 2000 values are well below one – that’s all you need to say. Perfect for office work! For the curious among you: The contrast of the built-in IPS panel is 1083:1 – measured in sRGB mode. Tip for you: take the measured max. brightness divided by the min. brightness (see protocol).
But that’s not all, because I also learned something new. The EV3450XC offers a function called DICOM. This is a special calibration for the medical sector, where the topic is grayscale. To put it simply: the viewing of X-ray images. These are known to be black and white and not colored.
We are dealing here with a special gamma curve and a white point of 7500 Kelvin. As you can see from the picture, the EV3450XC meets the requirements almost perfectly. The RGB balance could be subtly better, but you can see that in all my measurements. The bottom line is that buyers of this monitor get exactly what they need. A perfect sRGB monitor in ultrawide format.
On the subject of movie mode, I have to say that I deliberately chose the P3 color space here, as EIZO did not opt for the sRGB limitation. If sRGB had been used as the basis for measurement, my results would have been better (see Default against sRGB). What most people probably didn’t notice in the report is that the movie mode has an enormous contrast of over 4000:1. This is astounding, because according to EIZO, the panel has no local dimming. I can’t tell you how this high contrast was achieved. The fact is that the high contrast is only measurable in movie mode!
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