Originally Posted by Benjammin172
...what is the largest distance? I already purchased the projector and I picked up a Chief RPAU mount. So I'm just trying to figure out what kind of extension, if any, that I'll need for the top of the screen to end up about a foot from the ceiling.
Good choice on the equipment relo!
So, here's how I do it. Mount your screen. Mount it at a height you like, make sure you are comfortable with the height and that it's level and all the rest.
Now, grab a ladder, a friend, maybe a few books, and an extension cord. Flip the projector over, power it on, bring up a full screen image, and take the projector to the top of the ladder. VERY CAREFULLY! All of this is very low tech, but works very well. Adjust the lens shift so it is maxed out, dropping the image as low as possible when the projector is upside down.
Now, raise the projector up until the image is really close to square with the screen and fills the screen and has no visible angle or anything else. Have the mount on it and everything. Now, measure from the top of the mount to the ceiling. Add half an inch, and that's how long your extension column should be.
Run over to Home Depot, grab the tube in the length you need, head home and mount it.
Very custom, relatively quick, should be accurate for the mounting as long as you take your time and are careful. I sometimes use books to perch the projector on so it is a more stable base to measure from and make sure I have things right.