Grayscale, color fidelity, saturation and gamut to factory settings
Now ASUS really has to show that it is serious about the ProArt designation. We are promised a factory calibration in relation to sRGB and DCI-P3 with a DeltaE <2. The PA27JCV is even advertised as Calman Verified, so nothing can go wrong today – can it?
In terms of color space coverage, I was surprised because I didn’t expect to get 96 percent Adobe RGB or 80 percent Rec.2020. Take your time to look at the measurement results and there is an interim conclusion below.
Color space coverage
Gray Scale, Saturation, ColorChecker @ Default Settings (10 % APL)
Gray Scale, Saturation, ColorChecker @ OSD sRGB Color Space (10 % APL)
Gray Scale, Saturation, ColorChecker @ OSD DCI-P3 Color Space (10 % APL)
Gray Scale, Saturation, ColorChecker @ OSD Adobe RGB Color Space (10 % APL)
Gray Scale, Saturation, ColorChecker @ OSD Rec.709 Color Space (10 % APL)
Gray Scale, Saturation, ColorChecker @ OSD Rec.2020 Color Space (10 % APL)
Some of you readers will probably be a little confused because the contrast values vary so much and are extremely high for an IPS panel. ASUS delivers the PA27JCV with Edge-Lit Dimming enabled, hence the high contrast values. However, with dimming deactivated and normalized brightness, the panel still achieves a contrast ratio of 1550:1 – which is not bad at all for an IPS panel.
Native Contrast @ 200 Nits (dimming off)
“Dynamic” contrast @ 200 nits (dimming on)
Interim conclusion
ASUS delivers what is promised and this applies to all presets: avg. DeltaE <2! The interesting thing is that I measured these good values with dimming activated. This means that you can use dimming at any time and thus enjoy a significantly better contrast. The built-in IPS panel is basically only limited in terms of Rec.2020 and Adobe RGB, because the color space coverage here is not quite enough to cover 100 percent. However, Adobe RGB can still be used sensibly. The extent to which you want to work with the monitor in the Rec.2020 color space is ultimately up to you.
You also have to make sure that you set the appropriate gamma in the OSD. In relation to DCI-P3, the preset runs with gamma 2.6, if you don’t like that – adjust it. There is still something to criticize at this point. The fact that ASUS has blocked the sRGB mode in relation to the customizable settings. You can’t even adjust the brightness, which is a no-go in my opinion! In sRGB mode, there are only around 85 nits and that is far too dark for rooms flooded with light. I can recommend a workaround here by using the Rec.709 mode and setting the gamma to 2.2. With Rec.709 mode, you have full access to all OSD features.
One more note: if you don’t need local dimming, you can even slightly improve the color accuracy. Without dimming, the monitor even achieves a DeltaE <1 in sRGB and DCI-P3, which is already very good!
sRGB, DCI-P3 and Adobe RGB (Local Dimming off)
- 1 - Introduction, Features and Specs
- 2 - Workmanship and Details
- 3 - How we measure: Equipment and Methods
- 4 - Pixel Response Times
- 5 - Display Latencies
- 6 - Color-Performance @ Default Settings
- 7 - Direct Comparison and Power Consumption
- 8 - Color-Performance calibrated
- 9 - HDR-Performance
- 10 - Summary and Conclusion
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