Originally Posted by Debonaire
That's not true at all. I've seen a projector which does ~10k:1, the Sony VPL-VW60. Compared to my CRT projector the image is no where close in mildly dark scenes even, and my CRT is rated at a conservative 20,000:1. But you can get with some tricks over 500,000:1 with a CRT. This doesn't even come close to an OLED which does over 1 million:1. So maybe with over 20,000:1 you can begin to say contrast isn't a big deal. But it doesn't mean there isn't slightly perceptible diminishing returns once you go over a certain amount either, which isn't worth it if color, clarity, sharpness, etc are affected.
When I typed that I intended to compare 40’000 to 100,000 and omitted a “0”.
When I reread it and saw it I stopped and thought about it I almost changed it.
My thought was just a smidgen of reflected light will cause a 40’000 to go to 10,000 also maybe the light of one candle in the room. So I left it unedited.
I agree with you in a absolutely perfect room we could likely notice a difference and the difference might be in part CR related.
With human vision and these kinds of extreme CR numbers the room better be very good at controlling light and reflections or just about any other kind of change will misguide our eyes that are really poor light meters into thinking we are seeing better CR when what we may well be seeing is better perception of CR.
Comparing a CRT CR with a digital CR where the baseline lumens are so far apart is IMO asking a lot of our eyes. Our eyes can adjust 3 or 4 f-stops and we don’t even notice keep in mind each f-stop doubles the light 1, 2, 4, 8, 16 etc. Our eyes function over a range of about 22 f-stops.