Originally Posted by curt248
I would like to put up a 168in or 150in screen. I am building a dedicated basement theater room that is about 14 X 25ft. I have been considering the epson 8500ub. I'm not sure if it will be bright enough in movie mode. It has about 650 lumens in calibrated movie mode. I found a 150in fixed white screen with a gain of 1.1 for ~$650 (anyone know of a great bang for the buck screen?). I will be able to control the light well. I will paint the ceiling black (drywall), the walls and carpet will be a dark color. I will ceiling mount the projector.
Will that be enough or do I need to go smaller on the screen size?
I'm thinking about using wilsonart designer white for my screen.
I really want a 150inch screen size in 16:9 though.
The designer white screen can be had at the maximum height of 61 inches. This allows for a nice 2.35 screen size at 155 inches diagonal and 61 inches high.
For 16:9 the same screen could be 124 inch diagonal and 61 inch high.
I wonder how much of a pain it would be to adjust the zoom between 2.35:1 and 16:9 with a manual zoom such as the epson 8500ub?
Anyone have anyother screens that would work good for the 8500ub and a 150 inch diagonal 16:9 aspect ratio?
My experience says you will not be satisfied in any mode.
I own a 6500 and have probably done some sort of calibration (gray scale and gamma mostly) 20+ times since I got the machine in April 2009. Many of these were to learn more about calibrating. The ftL drop a lot in the first few hundred hours.
I just put a new lamp in mine and calibrated dynamic mode at low lamp and had about 16 ftL on a 118" Carada Brilliant White screen, 16:9 (stated gain of 1.4, but probably closer to 1.2). The colors aren't quite as accurate in dynamic, but I've decided to trade off that for a brighter picture, and it looks more contrasty to me, which I like.
At about 400 hours on my last bulb it was down to about 12 ftL (still low lamp) but this gives you an idea of the tailoff. On my first unit I had about 650 hours on it and it was putting out about 12ftL. But again this is after calibration. I think after 300-400 hours on the bulb it starts to level off based upon my experience.
In my dark theater that has good light control, I have found that if I go below 10 FtL, the dark scenes are starting to be hard to discern detail.
A 150" diagonal 16:9 screen is about 60% more surface area than mine, so at zero hours you would have less than 10 ftL on low lamp dynamic. On high lamp you would be around 13 ftL. After 400 hours you will be below 10 ftL, even on high lamp and these numbers are based on my screen which has a higher gain that what you are considering. You may want to look into a higher gain screen.
Hope this helps.