Originally Posted by twinturbo11
Hey guys , thanks for the reply. The screen will be 2 feet away from the ceiling and 3 feet off the floor. The right and left walls are about 4-6 feet away on each side. All walls and ceilings are white matte color, even my floor is white-colored matte parquet.
Projector is perfectly centered and 22 feet away from the screen. I sit 18 feet away from the screen.
Two concerns I had:
(1) you mentioned a white screen will have better colors in night-time viewing in my setup, but will it have as good or better contrast/deepblacks as the CineGrey5D ? this seems to be an open question in this thread...
(2) everyone is mentioning the positioning angles are important to take advantage of the CineGrey5D. Although I and my projector will be centered, are the distances mentioned above ok?
This is why I asked about the colors of your ceiling and walls. It's good that your screen is not too close to the ceiling, but you're far from having a light controlled room. In this case, a gray screen with extra gain is what you need.
You'll need the extra gain because despite the 5030ub having a reputation of being a light cannon, it's really only super bright in Dynamic mode. Even in dynamic mode the 5030ub will stuggle to light up a 150 inch screen at 22 feet.
I've personally measured the gain on the Cinegray 5D with the projector aimed at the center of the screen to be just over 1.3 at center, and slightly over 1.0 at the sides. (not as high as advertised, but still pretty good)
With those numbers in mind, in dynamic mode, the Epson 5030ub can put out 13 footlamberts onto your 150 inch screen at 22 feet. In a dark room, that's enough to give you a pretty good looking image. However, once you switch to any other mode, the picture will dim quite a bit.
As to you first concern, the Cinegrey 5D will preserve your blacks and contrast much better than a white screen could in your room.