Originally Posted by HUNDO
You are correct, I did pull them from PJC's calculator. I had actually planned to go closer to a 150" in the beginning, but based on their specs for optimum mounting height in relation to where I want the screen, the 18' 9" throw distance works about perfectly.
I'm not opposed to anything at this point. I do however have a line on some rigid white material that is sold in 6'x12' sheets for around $100. Hopefully I'll have more info tomorrow. Ideally, I would like to take the screen out of the room if necessary, so the drywall will be my last option.
Thanks so much for the quick response!
6' x 12' for $100.00? I tell ya this, your not the only one who will be anxious to hear about any news / info about that!
-But'cha gotta be advised that the larger you go, the more reflective the Screen must be, and that will work against you acheiving the deepest black levels out of the IF72.
If I can impress upon you one thing, it's that with the right decisions made, your end results will have to take no backseat to virtually any 1080p PJ / Screen combo. Shot Gun maybe....but that would still mean you'll be locked and loaded for a excellent viewing experience.
You want a Screen that can be as dark a gray as possible, while still maintaining at least 1.1 gain. Now this is not speculation...as I have done several set ups with the IF72 and I know exactly what it can/will do, and what suits it best as far as the applications you might consider as relates to screen size-available Throw options, and room conditions.
Bluntly put, if the 6' x 12' sheet material pans out, you can go as big as 72" x 128" (147" diagonal" ) however your screen must be at least 1.3 to 1.4 in Gain to deliver a "Better'n a LCD/Plasma" image (18-20 fls) And it won't achieve that unless something helps maintain the perception of Contrast a depth of Black Levels.
That's going to be harder to do as screen size rises. You have 9 vertical feet of screen wall to work with. The Ceiling is gonna be the most likely source of reflection, and although your going down the right road by having it painted out in a Gray, the Top of the Screen's leading edge really cannot be closer than 12" (...and preferably 16"...) to help ward of reflection. Otherwise, the closer the proximity of the Ceiling to the Screen, that darker and less reflective the Ceiling must be. Gosh. 72" + 16" = 88" 9' = 108" That leaves you 20" between the Floor and the bottom edge of the Screen. That might work with just one row of seating...because the Screen itself is 6' tall. But a second row would have to be perched on at least a 14" Platform. You'd need Guard Rails in that Theater!
Size can work against you in other ways as well. Another instance would be this way. If a image starts out having great contrast and deep blacks, it's naturally able to ward off the ill effects of outside sourced ambient light reflections. It might still take a hit, but not as much so as a lighter Gray or White surface..
If the sheer size of the Screen does not match up well with the PJ's attributes, something will suffer. You could for instance run the 72 in Bright Mode on a White , and attempt to calibrate things out, but your gonna have to accept far less as pertains to "Blacker Blacks" You could go with a simple Gray under the same circumstance, and it would be a improvement. But colors would get muted and whites crushed.
Any Cinema Mode would be....really dim.
There are two DIY apps I'd consider suggesting. One would be Silver Fire v.2 2.0 The other SF v2.HG The latter might allow you to run in Economy Mode and achieve Blacker Blacks in a Dark Room setting, while the SF v.2 2.0 will perform better in ambient light and still wow uou in the dark.
Right now I see the screen selection as being the easy part....it's dealing with your inevitable Screen Size selection that presents any uncertainty.