The buttons of the screen menu
The keys of the screen menu are classic, i. e. via small buttons under the screen on the right. The ON/OFF button is illuminated.
The Dell U2518D connectivity
Nothing but classic, although we can either note or regret the absence of a USB-C port in 2018.
What is the value of the Dell U2518D display after calibration with the i1Display Pro?
I calibrated this monitor - like all the monitors I test - with the best current colorimeter (except the superlative and very expensive Discus) in an excellent price/quality ratio: the i1Display Pro + i1Profiler software (version 1.7.2) in order to be able to locate this new monitor compared to other monitors on the market. I connected it with the Thunderbolt 2 cable on one side (MiniDisplayPort) and DisplayPort on the other, sold with the display.
Note on the display quality before calibration! Note on the display quality before calibration! It may be the first time on a display below 350 dollars that I see a factory quality setting compared to my calibrated displays. Obviously it will be necessary to lower the basic brightness but the factory display is really good.
I chose the following screen settings :
- Color mode: Standard
- Brightness: 20% for 100 Cd/m2 targeted,
- Contrast: 75%.
Essential! Be sure to reset the factory settings AND choose the generic profile of your computer before calibrating ! Once the reset is complete, select the generic screen profile in the system preferences before starting a possible calibration.
And as target values in the i1Profiler 1.8.0 software in advanced mode...
- Display technology : Choose white diodes,
- D65 or possibly a little less if you want a slightly warmer screen. (Note that at D55, the screen is really warm but not yellow like on cheap monitors),
- Luminance : 80 Cd/m2 or more depending on your main use (printing or web) and especially the brightness of your room,
- Contrast : Native or 287:1 for those who print a lot,
- Gamma : 2,2 – Standard curve,
- ICC norm : V2 (to avoid incompatibility problems with some image viewing software (images too dark) and obviously V4 if you know what you are doing).
And the result is?
First subjective impressions after this calibration...
Well, it's a nasty surprise! Amazing even. I observe many dominant ones, especially on the whites, a little greenish. I have never succeeded, whatever the parameters chosen, in having a better calibration than with the factory settings. I still can't explain this "anomaly". However, it must be noted that the factory setting is completely correct and perfectly usable in its current state. So I don't know if that's necessarily bad news. Here are the values that my colorimeter has recorded.
What does the final report say after calibration :
The color temperature (TC) of 6463K for 6500K requested remains a nice score on a mid-range monitor ! The contrast of 910:1 remains within the average of the IPS LED panel displays. To get such a contrast, I had to choose a contrast setting on the screen of 75%. at only 50%, the contrast dropped to 500: 1. the luminance of the black at 0.1 Cd/M2 guarantees rather deep blacks for a non-Oled screen.
Now, let's move on to the famous Delta E after calibration according to the 2000 standard which I use for the calibration of all the displays on this site :
The average Delta E standard 2000 is 2.25 ! This is much more than indicated by the final ex-factory report provided by Dell.
The Delta e of 5.69 for the worst patch is really high. If the display was not so good before calibration, it would be flunked on this site. And yet...
Now the luminance and color temperature harmonization tests :
Results above the high average for a screen that is all in all medium range. Really very good !!!
This time, the results are less spectacular but well within the average of the correct displays in this price range. Whatever happens, to the naked eye, the panel looks very homogeneous. We are therefore dealing with a beautiful panel with the electronics correctly chosen and adjusted. Retouching your photos on this screen will not be a painful experience!