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Deleted member 273615
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Are these figures based on your own measurements on the Eizo with both the Spyder and a spectro?
This doesn't really follow.
A less accurate instrument can still report perfect adherence to a given standard (i.e. Rec 709), it's just that you can't trust the result.
It is not reading RGB accurately. Period. My friend had exactly the same behavior on his ST60 plasma. Spyder 3 was showing that his reds were orange before a professional calibration and afterwards, while a JETI or a Klein was reading accurate reds, which also looked red and not orange. ST60 has an accurate colorspace from factory, but does need some adjustments to bring down those factory dE 3s and 2s to 1s and 0.5s. Spyder 3 is a horrible device. The black level on this monitor @ 100 cd/m^2 white point is between 0.3 and 0.2 cd/m^2 - almost every review stated that. I can bet you that if you were to re-measure black level with ColorMunki Display alone or profiled with i1Pro, then you'd get a far more accurate colorspace measurement result for this monitor even before calibrating grayscale.
As far as 90% goes, its just an approximation made from my experience. I profiled several i1D3s and ColorMunki's with i1Pro and in each case, either R or B (never G) was off by about 8-10% (dE 4-5). I compared my i1Pro against 2 rented ColorMunki Photo spectros and all readings on all 3 displays were almost identical. That doesn't make i1Pro a reference device like a JETI spectro, but in each case, calibrations with profiled colorimeters eliminated whichever minor (yet visible upon examination) tint there was after calibrations performed only with non-profiled i1D3s and ColorMunki's.
Just a side note (to those who do not know) about why you should always get a colorimeter and profile it with a spectro if you want a truly immersive image on any display you have, especially one like the Eizo:
It is important to understand that while dE 3 is an acceptable error, to achieve that error with an excellent i1D3 + i1Pro combo, you need a dE of 1 or close to it, because in reality that combo's dE 1 is close to dE 2-4. I never got that 3D image effect and realism in movies until I got a truly neutral grayscale without any minor tints, which happened only after I bought an i1Pro. Its the oldest one, revision A, very slow, has the oldest firmware, needs to be held at only one angle, needs re-adjustment every 10 minutes, very clunky and hard to use on displays devices, but it sure is accurate! All revision are equally accurate, but some are faster than others. I will trust my i1Pro over i1Display Pro/i1D3 any day for readings above 20% gray level. Below that spectros do not read accurately, which is why you also get a colorimeter and profile it. That way you get accuracy across the entire grayscale and colorimeter speed! I am sure many people know all this, so I hope I haven't offended anyone by providing that information.