Well nobody else does wink.gif
Well, that's kinda my point, actually.
So is that for 1920x1080, when it says 0.25 pixels?
Yes, that's for 1920 x 1080. Double that "0.25" pixels to "0.5" pixels wherever it occurs.
The benchmark for Nyquist is 70% of energy within 0.5 pixels. Even the worst case in the list above is 75%, so it's "OK for 4K" with the following caveat:Everything, and I mean EVERYTHING has to be perfectly aligned - lens centered, tilt perfect, perfect projector focus across the field (hard to achieve even WITHOUT an anamorphic in the way at typical low f-numbers of projection lenses, around f2, which the Sony 4K uses).
How often do installers achieve this kind of perfection in alignment? Not often.
In a way, it's harder to get digital projector optics perfect so that the hard-headed "focus freaks" accept them. This is because with a film projection lens you can't tell if there are pixel gaps because there are no pixels to see.
Film is continuous tone. What you can't see - pixels - won't sent you into conniptions.
But with a digital projector there's always someone up at the screen with a magnifying glass trying to get individual pixels, or even pixel tiling
(about 8 times pixel frequency!!!). They couldn't possibly tell whether a projector projecting continuous film tonality was sharp or not, but pixels in a digital projector give you a ready measuring tool.
To give you an idea of what we're talking about, a Sony 4K pixel on a 120" scope screen is 0.8mm wide, and a pixel tiling gap is 0.1mm wide. That's microscopic.
Know of anyone using your lens with a 4K projector like the Sony VW1000?
Yes, one of my CM-5E lenses replaced an Isco recently in a demo theater in Australia. Another is planned to be combined with the Sony 4K in the new year in one of those "million dollar" movie star Home cinemas.
To tell you the truth, I was disappointed in the 4K, simply because there wasn't any 4K material available to show on it. I'm sure there are 4K test reels around, but I haven't been privileged to see one yet. To tell any difference at all with Blu-Ray material I had to get REAL close to the screen, and I'm someone who knows what to look for. Your Average Joe wouldn't know the difference, even from a couple of feet away. That's my opinion, anyway.