REVIEW: Lenovo L220x Wide Part 9

Although the deltaE deviations from the sRGM standard were quite high, they look much better for the AdobeRGB colour space, as expected. Here, the monitor benefits from its extended colour space. The white point and gamma value are almost ideal.

The average deltaE value is just 1,8. This is a very good result. Somewhat higher deviations can only be observed for blue, but these are not critical.

Representation of the RGB correction curve of the graphics card after AdobeRGB- calibration. The closer the three coloured lines are to the 45° axis, the fewer colours have to be discarded for the correct calibration of the graphics card and the more intact the colour gradients remain.

Comparison of calibration to ECI 2.0 with ECI 2.0 standard

Calibrated	Goal	measured
White point / Kelvin	5000	4955
Brightness / cd/m²	120	120
Black point / cd/m²	0,00	0,10
Contrast / x:1	Nativ	1201
Gamma / average	Lstar (*)	2,33

* L-Star (L* for short) is the current standard of the European Colour Initiative (ECI). In Version 2.0 of the ECI-RGB profile, a grey gradient curve as per L* is taken instead of a gamma value of 1.8.

Apart from deviations for red and blue, ECI 2.0 calibration on the monitor is excellent. Deviations of less than 2 deltaE, are hardly visible, if at all with the naked eye. In addition, only minor adjustments had to be made in the graphics card’s colour output.

We then calibrated the Lenovo L220x to the criteria laid out by the UGRA (5800K, Gamma 1.8 and brightness 120 cd/m²) in order to test how suitable it was for digital pre-printing processes / soft proofing.

The result is fit to be seen. The L220x passes the UDACT certification without exception in all areas and demonstrates only minimal deviations. The fact that the model fulfilled these strict criteria despite the rather prominent blue shift was a positive surprise.

In this regard, the monitor demonstrates strengths we would not have guessed it had. The results are very good both in the AdobeRGB and the UGRA colour spaces and could allow the monitor to be of interest to more demanding graphics workers or photographers. Only the brightness, which is much too high, gets in the way of this idea.

The detailed UGRA report can be downloaded as a PDF file.

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