This is all relative to a 10-month-old Sony VPL-VW95ES. (I’m sorry in advance that this post is so long.)
I purchased Chromapure + an i1 Display 3PRO (with the extra calibration) + auto-cal about two months ago with the addition of a DVDO Duo about three weeks ago and yes, I’m still non-stop calibrating. I’m obviously a novice calibrator and I’ve put in well over 200 hours trying to get all of the numbers within range. This includes working on calibrating all day, all weekends including most Friday nights from around 5pm, well into Saturday mornings until around 6am and many weeknights from 5 to 10pm, too. (Skipping meals and working pretty much non-stop, but enough about that.)
There have always been one or two small issues to resolve when I get close to an acceptable calibration, so there have probably been over 50 restarts, but last night I thought that I had finally hit the jackpot. The grayscale was great all the way from 10 IRE to 100 with dEs of less than 1.5% all throughout. The chromaticity readings were superb, as well, with no color deviating more than .6%. Gamma was right where I wanted it, at 2.3 (+/- .01) straight across the board. Finally, the brightness was right on, too, with the 17 bar on the AVS disc still flashing.
So, what could be wrong, right? I threw chapter four (and a few others) of Fifth Element on the screen and everything was acceptable there. BUT, what has manifested itself is the color red slightly, but VERY noticeably permeating fade-to-blacks and this is also very obvious in both the AVS and Spears & Munsil (volume 2) test discs, when checking the brightness and contrast levels. Both the brightness and contrast patterns exhibit extremely noticeable pinkness in the flashing bars and all grayscale step-patterns show the obvious pinkness at the lightest end of the scale, too. (I’m currently at work, so I’m sorry, but I couldn’t post my Chromapure post-calibration reports online at this time.)
Now near the end of this most recent calibration I had also noticed a faint redness within the letterbox portions of the screen, so I went into the 0 IRE level and lowered red in the Duo as much as possible, before it would cause the 10 IRE level to drop – then this cured the letterbox red problem.
The only time that the overt redness problem shows up within Chromapure is in the reporting stage, where it’s reflecting a 4% error there. I don’t understand why the colorimeter isn’t picking this redness up during the calibration, producing otherwise, great numbers?
The reason why this post isn’t in the “Sony VPL-VW95ES calibration forum” is because I know that it’s not some inherent defect issue with the projector that’s causing the problem. How do I know this? Because, right when a prior auto-calibration resets its Duo settings to “factory”, before a fresh auto-cal is started, the pinkness in the grayscale completely goes away. The pinkness/redness is also not evident if I use one any of the other un-calibrated Sony settings, such as Cinema 1, 2, 3, etc.
Are there any very experienced, either professional or amateur calibrators out there that could please tell me what might be behind this excess redness that isn’t reflected in graphs/charts when calibrating the projector - fixing my obviously imperfect, but otherwise excellent calibration?
Here are all settings for the 95ES at calibration…
“User 2, Custom 3”
Both Auto Iris & Gamma off
Lamp on Low
(Of course, Motion & Film settings off.)
Blu-ray player – OPPO 93 playing via “Source Direct” and all its other settings at default/off.
Screen – 100” Stewart StudioTek 130
The four Chromapure auto-cal selection settings prior to running are 4:4:4, 1080p24, Field & 75 on the first tab and Rec. 709, 2.3 gamma on the second tab.
Thank you very much,