jeffreydj said:
Actually, based on the above, that isn't completely true -- at all. 6.8 ft is recommended for immersive detail, the maximum is about ~19ft according to *that* calculator. ~12ft would be right in the middle and still within range of acceptable viewing distance...
Now, it should also be remembered, all of these are recommendations -- not hard and fast rules. It completely depends on the TV and the viewer.
According to that same calculator it is right around 19.5 feet as the recommended maximum distance, and 12 would split the distance between the two... However at 12ft he's still perfectly fine based on the SMPTE standard as published.
If that's how you interpret it, then you're just simply not interpreting it correctly.
The calculator is broad in it's scope, giving recommendations for a lot of standards including THX movie screen distances and what have you, but the bottom two fields in the calculator
clearly indicate without any room for interpretation, that to fully resolve 1080i pictures, 6.8 feet is the MAXIMUM viewing distance recommended for a 52" 16:9 screen, and that 18.1 feet, NOT "right around" or anywhere near 19.5, is the max viewing distance for STANDARD DEFINITION NTSC, a standard that goes away for all terrestrial broadcasts in less than 5 months because it is being replaced by the ATSC standard and because it is significantly inferior and antiquated.
It can't really be any clearer than that, and there is no margin whatsoever for wiggle room in those numbers. The ATSC spent years and millions investigating this, and like it or not, that's the formula they came up with and that's the formula that HDTV in the USA uses to calculate the precise viewing distance, in this case 6.8 feet, that is by their recommendation supposed to provide the perfect immersive viewing experience.
Anything less is a compromise both in perceived resolution and viewing angle, meaning 12 feet is most definitely a compromise for a 52" screen. I don't know about anyone else, but I got HD with the intent of implementing it without any compromise at all. It's true, some may not be comfortable with sitting that close, and the OP is a good example of that. The HD police will not arrest you if you want to sit where it feels right to you, so do whatever you wish, but all one has to do is the very simple math and there is no doubt whatsoever that the optimum recommended distance is 6.8 feet for a 52" screen, if you want to fully resolve 1080i and get the full benefit of HD as the ATSC envisioned it for us.
If you don't, you don't. You're allowed. What you are NOT allowed, is to try to discount what are the facts regarding what is the optimum recommendation for fully resolving 1080i from the ATSC as is delivered by every 1080-capable HD channel in America via OTA, cable, or DBS. That's right there in black and white.