AVS Special Member
Join Date: Jun 2005
Location: Northern, VA - Washington, DC
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The lens shift on the W1070 ranges from about 1" above a screen to a few inches above a screen. As such, you can have the screen just about 6" to 12" from the ceiling, depending on the ceiling mount, and be just fine.
I watch the W1070 on a 161" diagonal 1.3 gain screen in low power mode and the screen looks good... with lights on. With lights out, it looks very good. Not RS46 good, but plenty of brightness, so 150" is not going to be an issue at all. But, I would be sure to go to a minimal gain screen 1.1-1.5 gain maximum.
I personally would not get the HD131x because of the focus issues, which may be fixed now, and the 2x color wheel which is not going to change. The W1070 having a 6x color wheel is a big plus IMO.
The Mits 7900, will have the image about 16" below the lens at the very least. Add 6" or so for the mount, and that puts the image at least 22" below ceiling height at the closest. A good value on the projector, but way to much offset for most users, and the large screen size will put it on, or near the floor. Less than ideal.
Worth saying that the HD131x also has more offset than the BenQ which will drop it lower as well. 12" of offset on a 150" diagonal with the Optoma. About 4" higher than the Mits, but no less than about 18" from the ceiling. That's 91" to the bottom of the image, or about 17" from the floor.
The W1070 can produce an image which will be about 28" from the floor. That's based on about a 6" or 7" stack height for the ceiling mount and projector body. There may be some range on this depending on the mount used, and the body height of the projector.
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