Originally Posted by WilsonL
I want to go to 160" wide with the Seymour AT (2:35-1) screen, with the RS35. in a 20' length light controlled room.
Am i crazy?
should i go smaller?
I can provide you some first hand experience with a similar setup.
I use the Seymour AT screen (latest xD version) and I am in a fully light controlled room that is an absolute bat cave, (black painted ceiling, walls covered with black commando cloth, and black carpet). I also using a CIH 2.37:1 screen with an anamorphic lens.
I currently use a 144" wide screen and to have two different immersion choices I have my first row at about one screen width or 12' away and the second row at about 1.5 screen width or a little over 18' feet away. My projector however is an Infocus IN83 which can put out about 1200 calibrated lumens. This gives me around 600 lumens after reasonable bulb aging (around 500 hours) which gives me between 10 - 12 ft lamberts when you consider my screen is 60 sqft and my screen material has a gain of 1.2. Using the manual iris in the projector and the low power mode of the bulb when it is new I can maintain roughly 600 - 650 lumens for the first 500 hours. For me even in my bat cave, when I get to 700-800 hours my bulb has lost even a bit more brightness and I get down to around 550 lumens the picture starts looking dull and I replace the bulb. I would not go with a projector with less brightness, and therefore I made a choice that I simply would not be able to use these "ultra high contrast ratio" projectors such as the RS35 until they go to an LED or laser light source that doesn't loose much brightness over its life. You also have very few choices in bright projectors (greater than 1000 calibrated lumens) under $10K, but there are 2 pretty good choices out there right now for less than $5K and a couple more choices over $5K.
So the 160" screen may work for you with the RS35 when the bulb is new and after a 100 hours it will already be starting to look pretty dull and/or dim. Therefore I would say yes your are crazy to go that big with that projector and screen combo and yes for RS35 and AT screen you will need to go much much smaller, like 118" wide 2.37 to 1 screen would give you that 10-12 ft lamberts after bulb aging.
With all that said, I can tell you that I have seen setups from folks on this forum that are using large screens with in my opinion pretty dim projectors and live with and enjoy what is probably in the 5 to 6 ft lamberts. I will also tell you that I love the large screen and would not trade my setup for a 118" wide 2.37 screen using an RS35. And yes I have seen the RS35 in good light controlled setup and the picture was noticeably better than what I have; however, that loss in screen size to me would not be worth the gain in picture quality. Most people on this forum do not share that feeling however.
Good luck and have fun.