Originally Posted by NicksHT
1) IF I opted for the 142" wide screen, what combination of screen gain and projector location would offer the best blend of image brightness and sharpness?
I'm sure others can confirm, but I don't think the RS500 will have trouble with 142" wide scope screen at all. I'd take a look at AVS's new "DIY V6" fabric for your screen.
2) I know if I move the projector closer I will achieve better brightness on a big 142" wide screen, but at the expense of sharpness as I understand it. Throw for these projectors is indicated at 1.4 to 2.8, with optimal sharpness at 2.1, but as a newbie to the projector world, I'm wondering how closely I must adhere to the optimal throw of 2.1? 2.1 x 142" wide screen suggests a projector location some 24' from the screen which projector central says will vastly underlight my screen. Looks like I need to be closer - perhaps significantly so. But if I mount closer, will I be disappointed in the reduced sharpness?
I don't recall ever seeing or hearing anything about throw impacting sharpness, it should be fine regardless of what your throw is. As far as projectorcentral, their calculator is fine for throw/screen size, etc, but it's worthless for brightness, no one knows what numbers they use for that.
For example, for a 142" wide scope screen, to hit the DCI standard 16fL, you need about 1200-1300 Lumens. The RS500 is capable of at least 1700 per Cine4home, actually they can do 1200 in Eco. The brightness will of course depend on throw.
3) Of course, I could add some screen gain, but how much? From my readings, it seems most people don't go beyond a gain of 1.3. And more problematically, perusing Seymour Screen's website seems to indicate that their premium 4k "enlightor" fabric actually has a negative gain at 0.98!?!
Yeah, you pretty much can't get a AT screen that's over unity gain. I think about the only AT screen that does have positive gain is the Stewart 1.3 microperf, but for the price of that (guessing), you could probably get an anamorphic lens which would net you more brightness (maybe, depending on throw).