Epson 1080 UB projector position

Do you already have the projector? I just bought this projector too. I have it temporarily on two side tables stacked on top of each other (about 44" high). However, I will be ceiling mounting it also and my ceiling is also approximately 7' 7". I was told that the less vertical/horizontal shift you use the better. I would strive to eliminate all horizontal shift by moving the dial back and forth until you hear a little click. Then figure out a mounting position based on that. Also, I was told that the projector looks best from the closest position. I will probably move back a little bit just in case you want a bigger screen later on. Also, you could probably lift up the projector to the ceiling while it is displaying an image and see how it looks. Just my thoughts. I will be going through all this in the coming weeks.

Projector central has a calculator. Use that calculator (there is a pro version too) to figure out. There is a slider for the zoom also. Keep it at wide angle instead of tele photo. It works pretty well.

Yep.

You can get a 92" image from 9'-0" throw (lens to screen distance) but that is about as large as you can go using a 9' throw. I would set the throw distance more like 11' so that you have the ability to throw a larger image if wanted. 92" may sound large right now, but after a week or two it will not seem that large. I view 106" from 10 to 11 feet. I like to sit mid way back in a theater when viewing movies.

The 1080UB has 468 lumens in theater mode. on a 92" screen that gives you 18.72fl. You want 12 to 16fl. If you go to a 106" screen you will have 14.09fl. This is all based on a 1.0 gain screen. If you get a screen above 1.0 gain then multiple the fl by the gain. The numbers will decrease the father back you place the projector.