Thanks! So according to this AU calculator if my screen was 192" d on a scope screen, I would need to sit for the most immersive angle/closest distance at:
Maximum THX viewing angle 36º = 23.3'
Whereas the Screen Innovations calculator says I should sit at 14'
for a 192" screen.
Maybe Screen Innovations just wants to sell us bigger screens?
After scratching my head trying to figure out if I should go CIH and how it works, this 1 minute video made it all clear to me:
I am now thinking I might go with a 176"D 2.35:1 screen which will have a 140"d 16:9 screen equivalent and get a projector with lens memory.
Going this route, when the screen has black bars on the side, and is projecting 16:9 content, will have an area of 8,375" sq.
However, on a scope screen is a different story. Here is how the area differs on a 176" scope screen for scope material VS projecting scope material onto a 16:9 screen:
Scope on Scope screen = 11, 160" sq
Scope on 16:9 screen = 6,277" sq
That is an amazing difference! I finally understand why I should go scope