Originally Posted by umr
The i1 Pro will not be correct unless you bias the readings. They are not accurate for DILA.
Not in my experience. The i1pro allows to get a close to perfect greyscale on the HD750/RS-20, at least at 30 IRE and above. I have had my i1pro-calibrated PJ checked by a professional in charge of internal screenings at Paramount, and he didn't say "what is this piece of c**p", on the contrary.
Below 30IRE, a tri-stimulus like the d2 trained to the i1pro provides more consistent and accurate results. Below 10IRE, I guess no equipment within the hobbyist reach can really be trusted, apart from the eyes of those who know how to use them (ie not me
I'm sure better equipment will allow to lower your dE even further. Whether it makes a difference visually, I would need to see with my eyes (or rather with better eyes
I'd say a d2 gets you 90% there, an i1pro 99% there, and IF you can see the difference, then you need something/someone else to make the last 1%.
I personally believe that at that level, the difference comes more from the experience of the calibrator than in the tools themselves. I have no doubt that Nadal would beat me on a tennis court even if we swapped rackets, if you see what I mean. And I'm convinced that a professional calibrator would get a better calibration on my PJ using my lowly i1pro than if I was using a holy PR
This being said, I also believe it's a disgrace not to tell Millerwill right away that he is right, that his greyscale would need to be adjusted after 500 hours, and that his i1pro is a fine tool to achieve very decent results.
Although I truly believe in the benefit of a good calibration, I think it would be fair to accept (and even encourage) a customer to maintain the calibration themselves by adjusting the greyscale, instead of insisting that nothing but a $$$$$$$$$$$ tool can do so. It doesn't seem fair to encourage people to get their display calibrated, and when a minority is passionate enough to invest the time and the money to learn to do (some of) it themselves, tell them they don't have the right tools.
Agreed, the i1pro is not perfect, and you can make a real bad job with it if you don't know what you're doing, but provided you use it properly it does allow you to get very decent results. In fact, updating a greyscale calibration after 500 hours and a change from low lamp to high lamp with ANY decent meter should result in an improvement (human error excepted).
Of course it can be further improved on, by both better tools and more experienced calibrators, but IMHO it's simply wrong to state that the i1pro is not ABLE to do the job, when so many professional calibrators, hobbyists and reviewers use one to do 99% of the work, and only use better/slower equipment to finish the calibration (when and if they do decide that more is needed).