Originally Posted by paris401
WOW... I never thought that mounting this pj would be so difficult.. i'm going to 'attempt' mounting mine this weekend.. I got 115'' screen, it sits 25'' off the ground , and I have 20'' on top of screen to ceiling-
i'm going to mount the pj approx. 15.5ft from the screen- the present infocus 7205 is hung from a 28'' pole/pipe from the ceiling - but the ceiling in that part of the room is 114'' high, so it sits at approx. 86'' from the floor, and the top of the screen is 80'' off the floor... if need be i'll $hitcan the 28'' pipe, and sub it with a shorter one, as don't want to lower the screen...
Why do you think it's difficult? Your setup is easy street for this projector.
Rounding to about 56" high for a 115" screen (approximate here). 25" from the bottom of the screen to the floor gives about 81" high. So the projector lens centerline can be anywhere from about 92" and up in practical terms a few inches (please verify with the installation guide in the manual, I'm estimating here from my 110" screen).
Given you've got a 114" ceiling, something like a 6-10" drop tube (assuming the rest of the mount adds up to about 4" or so, and the lens CL is roughly 3" below the mounting plane on the top of the projector) would probably work out pretty well and put the projector pretty high up and out of the way. Again - please verify this in the manual.
The projector has a good bit of lens shift, so you just need to make sure you're somewhere in the ballpark. With a screen that low and a ceiling that high you almost can't miss the window it's giving you (which is roughly 19-20" in height).
I'm really not understanding how people are having such a hard time setting this projector up, especially with an existing projector with no lens shift properly setup. How in the world did you get your initial projector setup when it didn't have lens shift? You'd have to get stuff bang on with maybe tenths of an inch adjustment with drop tubes and things like that. My PA70G (no zoom) took me about 6-8 hours of welding up a mount to adjust things just right and even then I was left a little irritated at the end result still only having maybe a quarter of an inch leeway. My HC7900DW I tossed up on the mount with no drop tube and had displaying a perfect image in about 1 hour (this included putting a 2x8 backing plate in my attic to move the mount over slightly).