The On/Off that you see on the chart is only with Dynamic turn off. The tuning need to be done with DB turn off. After the tuning, I turn on DB which help to improve the black level. Black level on dark scene is quite good with better gradient in dark scene. You can see the difference by turning off the dynamic iris to compare the scene. I'm looking to get an Optoma HD86.
If you are talking about Phil review from AV forum, I had to disagreed with him on the picture quality. He rated good for OTB picture and good too for after tuning. He also rated RS10 good for picture quality. I had to rate very good for W6000 for after tuning PQ. RS10 is not close to W6000 after tuning as I had watch the unit in my HT room. Also he mention that the iris is very noisy which I don't feel so. Can you hear the iris? Yes, if you display a total black scene then switch to very bright scene. If you are using test pattern in this manner, you can hear the iris noise. But normal movie session, the iris never move in extreme position so you can't hear the iris noise. Also, I had make some adjustment to iris max and min position to even further minimize the iris movement effect. I had watch dark knight SWAT team scene few times and I can't really see iris movement effect. But you know the iris is working as the dark background scene is very good. One advantage of W6000 iris design is it can open/close at multiple step. If you consider the default range +12 to +84, that's quite a lot of range to play around. HD82 dynamic iris is only either open/close (2 steps), but no intermediate steps. My friend own a Panasonic AE700 and he also confirm that AE700 dynamic iris is either open/close. Not sure on AE4000 but I believe should multiple steps as you need the multiple range to minimize the iris movement effect.
Now I'm tuning the CCA and based on my first run, although I can get quite a good CIE gamut at 75% brightness, 100% saturation, but after asking few ISF calibrator in AVSForums.com, they advice me to redo the calibration at 100% brightness, 75% saturation. Well, Calman 3.6 can't do this and according to the developer, they will release this option in ver 4.0. So now have to use a manual spreadsheet to calculate. The reason to go for 75% saturation is most digital display do not have a linear tracking from 100% to 0% saturation. And most of the movie doesn't display 100% saturated color. So it's best to get 25% to 75% close to the gamut than 100%.
If you are interested, here's the CIE gamut after tuning CCA based on first run.
This post has been edited by pierreye: Feb 4 2010, 02:10 PM