Quote Originally Posted by David A. Goldfarb View Post
The quality is good, but it's designed for use in a large auditorium, and it can be hard to find lenses short enough to project a normal sized image in a smaller room. I think the shortest I've seen is 6.5". It wouldn't be hard to adapt other lenses.
David:

Correct me if I am wrong, but isn't the problem one of finding lenses that are long enough to project a normal sized image in a smaller room?

Doesn't the projected image get smaller as the focal length increases?