NEC PA242W Monitor Review
by Chris Heinonen on September 27, 2013 9:00 AM ESTNEC offers their own calibration software, SpectraView, for their monitors. Most software packages like CalMAN work with the video card LUTs to improve calibration, and the monitor LUTs if they can access them. The NEC PA242W contains a 14-bit, 3D LUT that allows you to correct the output to be almost perfect. Using SpectraView, NEC will reset your video-card LUT to be neutral and rely only on the monitor LUT so it will work correctly afterwards on almost any PC.
You can use a wide variety of meters with SpectraView but I chose to use my i1Pro. It isn’t as good at low-light as the C6, but it's more color accurate. The C6 is accurate if you profile it, but the NEC software does not allow for this. Once connected you choose your targets (D65 white point, 2.2 gamma, 200 cd/m^2, and sRGB gamut here) and then the software calibrates the PA242W. The calibration is also much quicker than CalMAN, which is nice. You can save multiple different targets in the SpectraView software and then load them back up later if you need to work in multiple environments.
After the calibration I measured again with CalMAN using the same settings as before to see if this works better than CalMAN on its own. To see how this performs I had CalMAN measure far more points than usual, which takes a long time.
|
CalMAN Calibrated, 200 cd/m^2 |
SpectraView, 200 cd/m^2 |
|
| White Level (cd/m^2) | 204.14 | 200.6 |
| Black Level (cd/m^2) | 0.366 | 0.3827 |
| Contrast Ratio | 558:1 | 524:1 |
| Gamma (Average) | 2.1437 | 2.1596 |
| Color Temperature | 6426K | 6458K |
| Grayscale dE2000 | 0.6504 | 0.706 |
| Color Checker dE2000 | 0.6392 | 0.8781 |
| Saturations dE2000 | 0.6722 | 0.7461 |
The NEC software produces very similar results. The contrast level is a little worse, but the light output level is slightly more accurate. Everything else is close enough as to be a draw where this is concerned.
Average saturation and color checker dE2000 errors are below 0.9, which is incredibly impressive. No individual measurements rise over a dE2000 of 2.0, and that means you should have no visible errors now. None.
When I re-ran the NEC Calibration and targeted 80 cd/m^2 instead of 200, the results are not nearly as good. This might be due to using the i1Pro and it not performing as well in lower-light situations. It also might just be that the method the software uses is not as effective at lower light targets. With these I find the CalMAN calibration to perform better.
The SpectraView software also allows you to save your calibrations and recall them. You can select your saved settings from a drop-down list and it will reload the LUT into the monitor. If you're regularly moving from sRGB to AdobeRGB or other colorspaces and back, this makes it easy to do so. It also avoids using the video card to make it more reliable than other methods.
After using the SpectraView software and seeing what it can do, I’d suggest it should be considered possibly essential for this display. The ability to save and recall multiple presets makes working with the monitor with different media, or lighting conditions, simple and easy. There is no worrying about the display not being setup ideally for whatever environment you need to work in. Also worth noting is that by going directly to the monitor LUTs, the final calibrated colors will be used regardless of what program you run; this isn't always the case with video card LUTs, as games and videos will sometimes bypass those, and it's one more feature that sets a display like the PA242W apart from consumer models.
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cheinonen - Monday, September 30, 2013 - link
The current version of CalMAN, at least one of the higher end versions, has support for calibrating a set of displays to look identical. It might mean none of them are perfect, but they all look about the same. I've never tested it out, as it's meant for commercial installations, but that might help with this issue if you already have the monitors.1Angelreloaded - Saturday, October 5, 2013 - link
instead of using 3 monitors, have you ever thought about moving to a large format display they make professional based ones for 40inch and higher now at 4k levels with IPS tech, that's a lot more realestate than say 3 1080p s side by side.nathanddrews - Friday, September 27, 2013 - link
I think I already know the answer to this: "too much".How much would it actually add to the cost of a monitor to have it pre-calibrated using this method at the factory? Obviously a trained human would be expensive and time consuming, but what about a series of sensors on the assembly line that tune the display before packaging? Panels that meet the requirements for uniformity and gamut get one price, displays that can't make the cut go off to a different bin. Doesn't seem too ridiculous to me.
Senti - Friday, September 27, 2013 - link
The problem is the transportation after that will likely screw everything in unpredictable way.nathanddrews - Friday, September 27, 2013 - link
How, exactly? I've never heard of shipping or transporting affecting display calibration...foxalopex - Friday, September 27, 2013 - link
Professional calibration software like Spectraview is designed to ask for a recalibration every 2-4 weeks. So yes by the time it gets to you it's not as calibrated as it could be. Keep in mind this is a professional monitor so they're nothing like a normal user. If you're more on a budget, a good $600-700 IPS monitor would probably work for most folks but for folks who insist on the best, you can't go wrong.DanNeely - Friday, September 27, 2013 - link
That drift is due to components aging with; a good factory calibration should still be good when you unbox it and will stay better than what we normally suffer with for a while since the bad one is drifting too.Some tablet vendors have been doing it for at least a year now. I'd be interested in seeing how much the screens on them have drifted if Anandtech used any of the tablets they did color calibration testing a year ago as daily drivers.
bobbozzo - Friday, September 27, 2013 - link
see above:cheinonen - Friday, September 27, 2013
...the out-of-box experience is also very good and it is still more uniform than any other display tested to date. The calibration does not affect the uniformity.
cheinonen - Saturday, September 28, 2013 - link
Just as an FYI, measuring the uniformity to the degree that I do takes close to two hours per display. That's with a fast meter and moving it between locations as quickly as possible but still allowing time for each sample to settle and be accurate. Adding that kind of testing to every display will increase the price a lot. Most companies wouldn't see any return on investment there, since the majority of consumers still don't care enough. Even if you only add $25 to the cost, that's a lot for most people unless you're talking about $1,200 displays.dushyanth - Friday, September 27, 2013 - link
which would you choose: Eizo CS230 or this