Originally Posted by smitty
So you would say that this chart is incorrect. How would adjust the bottom screen sizes in your opinion -- like how many feet would you subtract? Not trying to be argumentative -- I'm just trying to understand what the "conventional wisdom" might be on when one can see the benefits of 4k. Your opinion seems much more conservative than what I've read elsewhere on this forum.
I have done a ton of side-by-side here. My vision with glasses on is 20/20 solid. I think that chart is incorrect in that it's labeled "4K Worth it", "8K Worth it". I think it should be labeled "4K Visible", "8K Visible".
I started with an eshift JVC 14 feet from a 135" screen. When I "upgraded" to 4K, I bought a 285ES. Playing games, which is the most obvious way to benefit from native 4K, I really couldn't tell the difference at 14 feet away from my screen even wearing glasses. I moved to 10 feet, then 8.5 feet, and am now at 7 feet away. Even at 7 feet away, most of a UHD looks basically the same at 4K and 1080p (HDR aside). Purely from resolution, you will find scenes where you see some extra detail at 4K. A lot of these scenes flash by quickly and are gone. Take Lucy. The scene where the ape is drinking water you can see detail in the back ground, then the drone over the forest, then the quick city scene. You see it all there. That flashes by quickly and you are then seeing 2 faces as people are talking. That does not benefit at 4K resolution even at 7 feet away. And that's most content in a UHD. To get the super small details in a scene, you need to be sitting close especially when it flashes by fast and it's not the primary point being viewed on the screen. 4K details are in background images and things not directly in the foreground. Again, most the time. I'm not saying there aren't some foreground scenes that can show off 4K. But it's really in the fine details.
In games, everything on screen is in sharp focus all the time. The details in the background and distance are blatantly obvious as at 4K you can just see more. Even games really aren't that much different looking 14 feet away from my screen. In fact, games is the reason I made my final move from 8.5 feet to 7 feet from my screen. Sitting close enough, there really is a big wow factor in native 4K.
It's like taking a vision test. At some point the letters get small and you can make out what they are but its hard. The fact that you can tell what the letter is doesn't mean you can comfortably read or see that letter.
I would say the minimum you should be sitting back is the width if your screen. Sitting further, you may notice
4K in some instances but you really aren't benefiting
This is easy for anyone with a 4K projector to test. Grab a bean bag or kitchen chair and sit around 0.80-1.0 screen widths from your screen and play this video: http://hifiandtheater.com/files/yokohama-night-4k.mkv
. See how much more detail you can make out than 1.3-1.5 screen widths back.