The manual lens is a bit less limited than most DLP projectors. Still, it is only a 1.3:1 zoom ratio, which is close to the 1.2:1 ratio that is typical of DLP home theater projectors.
This doesn't give you much placement flexibility. For a 100 inch, 16:9 aspect ratio screen, you can place the projector (measured from front of lens) as close as 11 feet, 1 inch, and as far back as 14 feet, 5 inches. That's a workable range for ceiling mounting, and nicely goes back far enough that the projector can be mounted behind the audience in many rooms, depending on how far back you like to sit.