Re: NEC PA271Q "Native" chromaticities
Re: NEC PA271Q "Native" chromaticities
- Subject: Re: NEC PA271Q "Native" chromaticities
- From: Wire ~ via colorsync-users <email@hidden>
- Date: Fri, 3 Jan 2020 11:16:24 -0800
Well, I agree, how can you trust anything?! :0 I get frustrated because
color management seems to be a circular chase sometimes, even though I know
it's not.
More seriously, I find my ability to perceive color fatigues when I grade
images for long periods. I also see that sometimes I am much more-or-less
sensitive to saturation when environment is otherwise constant. So I find
am a huge variable in my color experience :)
Every review / test of desktop IPS display I have seen, and I've prolly
read 100 or more over the years, reports uniformity error as non-zero. It's
the nature of the tech. And how much I notice or care is highly subjective.
I prefer it to be zero, but these are just god-given parameters of the
situation. Yes, higher fidelity is cool. It looks amazing to see pictures
in great color. I say YES to quality.
I c o n c u r that having a pair of displays side-by-side, can create an
irritating difference when drift is as small as 1 dE, although—again—how
much it matters in general imaging practice is even more subjective
that our visual systems.
"So what does it all mean, Basil?"
If money were no object, I would still consider this unit. Actually, even
being partly blind, were I to spend more, I would prefer higher resolution,
over further improved color based on much I like this units performance.
Also, I was reluctant to acquire this model because I saw user reviews
complaining about uniformity. This one is completely acceptable to me.
Now, I ordered two, but one was damaged by FedEx. The replacement arrives
today, So I will get to see if it's a one-off in a bad lot or not a problem.
The units these are replacing are also Dells, 2009UWs, IPS, low-res, bought
based on price/performance in 2010. These also had some panel left/right
variation which was acceptable. With those, I cleverly solved the problem
of a slight mismatch by setting the sides that touch to match. And while I
would prefer there was no variation to account, it has never affected my
professional work in any way. I truly enjoy quality, and what I am seeing
from Dell looks very good. Those 2009UWs turned out to measure as perfect
sRGB, and once calibrated, had smooth neutral response. They've served me
well for a decade. Though as they are aging, the backlight of one has
developed some minor botches. NEC was making top-flight gear back then
too—and 20 years before with CRTs (Who remembers the famous
"Multisync")—for about $1500/unit, while these Dell 2009UWs got to 98
percent of the performance of an NEC for 1/5 of the prices. You see how I
think.
So, if the second UP2516D that arrives today performs about as well as this
one, I will have 2 great functioning wide-gamut displays, I will order an
i1d3 to replace my DTP94, and drink a bottle of Dom Perignon with a filet
mignon for dinner, and still have money left in my pocket as compared to
buying an NEC!
I bring all this up just to share my experience—maybe it will help someone
else, and because it's interesting to color nerds, so pls enjoy.
I will do a crude uniformity measurement with the Uniformity Compensator
feature turned on and report what I find for the pair of units.
Best to you all.
On Fri, Jan 3, 2020 at 10:08 AM Roger Breton via colorsync-users <
email@hidden> wrote:
> Sorry for the typo, I meant PA271Q -- not "W".
> Uniformity is very important, as Andrew aptly noted.
> I remember getting bitten by relatively poor screen uniformity, comparing
> images to one another; how could one compare the differences in the "images
> themselves" when the screen "colors" drifts from one side to the other?
>
> / Roger
>
> -----Original Message-----
> From: colorsync-users
> <colorsync-users-bounces+graxx=email@hidden> On Behalf Of
> Roger Breton via colorsync-users
> Sent: January 3, 2020 12:21 PM
> To: ''colorsync-users?lists.apple.com' List'
> <email@hidden>
> Subject: RE: NEC PA271Q "Native" chromaticities
>
> It's almost on the nose of the NEC PA271W chromaticities, practically the
> same 'gamut'.
> For a whole let less money. But what about the 'uniformity'? Can't say how
> comparable it is, for I don't have a PA271W but that's an important
> quality.
>
> / Roger
>
> -----Original Message-----
> From: colorsync-users
> <colorsync-users-bounces+graxx=email@hidden> On Behalf Of
> Wire ~ via colorsync-users
> Sent: January 3, 2020 12:12 PM
> To: email@hidden
> Subject: Re: NEC PA271Q "Native" chromaticities
>
> On Fri, Jan 3, 2020 at 7:54 AM <email@hidden> wrote:
>
> > Are you able to post the measured RGB chromaticities?
> > / Roger
>
>
> Dell UP2516D primaries as measured using DisplayCal / Monaco Optix DTP94
>
> I haven't sanity-checked these numbers, so if something looks weird please
> say so...
>
> Display in native mode:
> Chromaticity (illuminant-relative)
> Channel 1 (R) xy 0.6829 0.3123
> Channel 2 (G) xy 0.2256 0.7248
> Channel 3 (B) xy 0.1515 0.0486
>
> Display in Adobe RGB preset mode:
> Channel 1 (R) xy 0.6441 0.3301
> Channel 2 (G) xy 0.2278 0.7157
> Channel 3 (B) xy 0.1515 0.0562
>
> /wire
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