With our change to CalMAN, we will also now be evaluating displays for their grayscale and gamma point. Previously we only targeted a gamma of 2.2 in calibrations but never measured it in the end. Now we will be choosing two targets in our reviews. For light output of 200 cd/m², we will target the same gamma of 2.2 right now. 2.2 gamma is still a de-facto standard, and is the standard for Apple computers and devices as well as video content. For our second calibration we target 80 cd/m² with an sRGB gamma curve. Both of these are specified in the sRGB standard, so those doing professional print or computer graphics work would likely want this.

Hopefully a display will be able to handle both of these tests, and we will also check for the grayscale quality on its own by checking 21 points, just like we do with our tablet and smartphone reviews. This will provide you with more data, as well as consistent data for the different devices.

  Pre-Calibration 200 cd/m² Target 80 cd/m² Target
White Level 201.5 198.4 80.1
Black Level 0.1689 0.1644 0.067
Contrast Ratio 1193:1 1207:1 1197:1
Average CCT 6545 6537 6599
Gamma 2.1648 2.2128 2.4109
Average dE2000 2.3847 0.535 0.6238

Looking at the RGB Balance for the data, the pre-calibration data starts out a bit too-blue, then develops a red tint, before finally winding up with a lack of green at the top of the grayscale. The average CCT remains close to 6503K overall, but the RGB balance shows that there is a lack of correct balance in there. Looking at the post-calibrations numbers for 200 and 80 cd/m², we see almost no deviation at all in the RGB balance, which is much better. The 80 cd/m² results have a bit too much blue perhaps, but overall they're acceptable.

The pre-calibration gamma point is very close to the 2.20 target, but looking at the chart we see some issues. The gamma point rises and falls across the grayscale, which will leads to midtones and highlights not having the correct level of light output, and will lead to a less dynamic image. The overall number is good, but the chart shows that it’s not quite right. The 2.20 target for our 200 cd/m² calibration is much better, with a very linear 2.20 gamma across the whole grayscale. There are a couple small bumps in there, but nothing that would be visible in daily use.

The sRGB target is different, as the gamma isn’t linear across the whole grayscale. Instead the shadows start at 1, and it ramps up as you leave the shadows, which results in an average gamma across the grayscale of 2.40 in the end. Because of this it’s far more important to look at the actual graph than the final number, and here the LG 29EA93 does very well at tracking the target. Once calibrated, the gamma curve for the LG is very good with either sRGB or Power Law targets.

The grayscale dE2000 values takes all of this data into account. Pre-calibration, the dE2000 starts out well in the shadows, but by the end of the grayscale we have dE2000 values above 3, indicating a visible grayscale error that we can see even in motion. The average error is pretty low, but by the end it’s higher than we would like. Post-calibration, both grayscales are free of all visible error. There isn’t a single point that is above 2.0, and no one should be able to see any errors in real world use. In the end, the grayscale is basically perfect for these displays after calibration.

Pre-calibration, the LG 29EA93 is good, but not great. Post-calibration, it’s virtually perfect and will be basically free of visible errors when being used.

Intro, Brightness and Contrast Color Performance
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  • Kittihawk - Thursday, June 6, 2013 - link

    It's a good screen but another way of looking at it is not that it's ultra-wide but that it's ultra-cropped - sadly my old Apple Cinema 30inch display failed and I go this one to replace - loosing about 1/4 of the screen size.

    Some really frustrating things you need to know - there is no display port cable in the box. That is really bad because, LG, the money I use to pay you comes from being productive and I lost a day of editing while I figured out that I needed the cable and ordered off Amazon. Additionally I was really confused about not being able to get the full resolution on the VGA connection until I worked out that without a 'display port' cable you will not get the full resolution. Also your graphics card will also need to support the higher resolution sizes and even then it may not fit exactly and you will need secondary software to tweak. That might all be obvious to the computer nerds who make these things but its not to the average end user.

    Also the 'really clever cardboard box' quoted by Chris (Chris Heinonen ) was absent - instead the usual polystyrene menace - so I think Chris you were a bit duped at times by LG. In addition there was a strong formaldehyde plastic small from the new monitor - not good in a bedroom, but soon became undetectable.

    There was also a dead pixel - never had that with any of the Mac screens I use (I have five).

    Despite all that I like it - mainly because the lower height allows me to look out of the window behind and day dream instead of doing my work!
  • Manub - Friday, July 12, 2013 - link

    I just received mine and while checking the service menu it states V1.33.
  • lawrencejob - Monday, July 22, 2013 - link

    I bought it on Saturday for £350, Amazon.

    just came by to thank you: this was an excellent review and instrumental in my purchase.

    One thing to add: I wasn't very impressed by the black levels (although I've yet to calibrate it properly) and the device does a remarkable job at looking both too small and enormous at the same time (by my calculations there's only a little between this and a 32" TV with 21:9 content).
  • lawrencejob - Monday, July 22, 2013 - link

    Should probably have proof-read that before sending it.
  • forserum - Thursday, August 1, 2013 - link

    On lg site they told me it will get the latest firmware
  • jezzer - Tuesday, August 27, 2013 - link

    how to tell if it is a rev 1.25? anyone knows? thx
  • CDubbs - Friday, September 13, 2013 - link

    Has anyone seen benchmarks on the 29EA73 or 29EB73 coming out next week? Did they carry over the improvements from this model? It is being released at a lower price point and I am trying to determine where the compromises were made. Newegg has it on pre-order for 499 with a $50 store credit gift card.
  • arijit.ray81 - Wednesday, November 27, 2013 - link

    What's the version of DisplayPort on this? Is it 1.2?

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