Click to enlarge.So close. This Epson has plenty of lens shift too! For that same 100 inch screen, the Epson can be placed, (normal or inverted), anywhere from 22.7 inches above the top of the screen surface, all the way down to 22.7 inches below the bottom of the screen surface. That is measured from the center of the lens. There is also a good amount of horizontal lens shift. Using horizontal lens shift will partially limit the range of the vertical lens shift (and vice versa).
The combination of the wide range zoom lens, and excellent lens shift, makes ceiling mounting, or shelf mounting practical, in almost any room situattion.