NEC PA242W and print matching

[digitaldog]

Andrew:  I don't understand 3 and 4; they seem contradictory.  3. says soft proof  to sRGB in LR, forget the display. But 4 says I should use a different calibration target.  I'm confused.

Soft proof shows you the output to either a print or sRGB (if the data isn't in sRGB). The soft proof only works correctly IF calibration is produced to result in a match. That's why SpectraView allows differing calibration targets that can be switched on-the-fly. And just because you soft proof or view sRGB data for the net, doesn't mean anyone else out there will see what you are viewing!

[Rob Whitehead]

Hi Rob,
The only issue I have with your post is the word "automatic", since you still have to open the software, set up the hardware and start the calibration.  I assume what you mean is that the previous calibration "settings" will be displayed, so it's not necessary to do all of that each time. 

Gary

Hi Gary,

I'm just making the point for those who haven't played with one that with the NEC system the hardware/software calibration automatically adjusts the monitor ie. no user adjustments of monitor settings is required.

I've been using a calibrated system since my days with a 19inch Mitsubishi, but not with any particularly flash gear (Spyder Pro etc from 10 years plus ago) - so I'm used to having to change a lot of monitor settings as part of the calibration process.

NEC is pretty slick with the right Spyder/software calibration. The Eizo users out there I'm sure have it pretty easy as well.

Cheers,

Rob

P.S. Some interesting info in this thread that i personally still need to digest...   

[SeanLa]

Off topic, but has anyone wearing glasses noticed an issue with this model PA242W?

When I turn my head slightly I see bright red/orange vertical lines or blue/green vertical lines on areas of the screen where there is a white to dark vertical (such as the edge of a browser window). It looks much like chromatic aberration.

Can see it without glasses on, but then it is very subtle.

Checking a Dell display now I see something similar with glasses on which is far more subtle (never noticed it before).

Wondering now if this is typical or a result of this particular panel being out of spec?

[digitaldog]

Off topic, but has anyone wearing glasses noticed an issue with this model PA242W?

Not seeing with or without glasses. I've got a special prescription just for viewing the display. Running a PA272W but don't recall seeing anything like you describe on the older PA271 or 3090.

[SeanLa]

Thanks Andrew.

May I ask if your special prescription is glass or polycarbonate optical plastic?

Sean

[digitaldog]

May I ask if your special prescription is glass or polycarbonate optical plastic?

Pretty sure plastic.

[Czornyj]

When I turn my head slightly I see bright red/orange vertical lines or blue/green vertical lines on areas of the screen where there is a white to dark vertical (such as the edge of a browser window). It looks much like chromatic aberration.

Do you have astigmatism?

[Alan Klein]

I just got new glasses and notice similar stuff.  The lens is smaller so the I'm guessing that the change in magnification is greater more quickly.  I see the aberration you mention at the top and bottom of the lens but they disappear when I look directly at them in the middle of the glasses.  I have an astigmatism and use polycarninate lenses but my last lenses only give this effect to a minor degree.  I also saw it at the edge of a bank of snow against a darker background.  Again, it's at the top and bottom of the lens not in the middle. The lens I breaking up the white light into a rainbow effect.

[Czornyj]

It's related to glasses for astigmatism, they cause chromatic aberration you're describing.

[digitaldog]

It's related to glasses for astigmatism, they cause chromatic aberration you're describing.

Odd, I suffer from astigmatism, maybe not much as I don't see this effect. When you say glasses for astigmatism, it means glass not plastic?

[Czornyj]

Odd, I suffer from astigmatism, maybe not much as I don't see this effect. When you say glasses for astigmatism, it means glass not plastic?

I'm not sure if the glasses were from glass or plastic, but here's the story.

My friend who also suffer from astigmatism bought PA272W and reported me it's completely broken, and has terrible chromatic aberrations in the corners, that make him sick after a couple of minutes of work. I was very intrigued, so went to check it - the problematic PA272W was perfect, overall all PAxx2 displays I saw are surprisingly flawless. Then I took his glasses and took a look at thru them from a certain distance (as I have no vision defects) - and I could easily observe the chromatic aberrations he and the others described, so the problem is 100% astigmatism related.

The strange thing was that he didn't have any similar problems with 27" W-LED iMac, nor WG-CCFL displays like NEC PA271W or EIZO CG, so it also has something to do with GBr-LED backlight of PAxx2 series. It's also possible that the issue occurs with specific type of glasses, as it was already mentioned in previous post.

[Alan Klein]

It occurs with my PA242W also.  You can see either red or blue along the line where black meets white - anywhere on the screen.  However, it's only noticeable for me anyway when I look through the top or bottom of my glasses.  It doesn't create that effect when I look through the middle of the lens where the distance for a computer screen is in focus.   I'm using a variable focus lens so the top is for distance and the bottom is for reading.  So the aberrations and coloring effect are in those areas.  My lenses are polycarbonate not actual glass but I don't think that matters.

[SeanLa]

What I've been able to find out is that this isn't about astigmatism, but rather the eyeglass lens material. Lenses made of these materials for astigmatism may result in even more chromatic aberration - which may explain Czornyj's observation. There are a number of materials used that result in varying amounts of chromatic dispersion. If there is enough dispersion it is seen as chromatic aberration by the wearer.

The material with high CA is polycarbonate which is used because it can be made the thinnest. Some other plastics and types of glass produce less CA, but are thicker/less stylish.

The other part of this is the GBr-LED technology which seems to make the effect worse.

Here's a table of lens materials and 'ABBE values':
http://www.starreloaders.com/edhall/abbevalues.html

Interesting to see that CR-39 (Lee filters are made from) has a high ABBE value.