Hi Tesla,
(my first post)
I work for a company that installs a lot of hall projectors. What are the dimensions of the hall?
A few considerations you should make first:-
At what position do you want to input plate to go?
What size image are you looking for?
Will this be projecting directly on to a wall, or are you wanting an electric screen?
The ideal solution in this sort of environment is usually an overhead projector in it's own protective cage. This would be mounted directly to the ceiling or, if there are any, a girder that spans the hall. Image wise, we would normally suggest an electric screen or a goo wall (a matt painted section of the wall that is the size of the image).
