The screen size is limited to 100 inches, but as Matthew Brown
pointed out when demonstrating the unit, you could not reach the top of a larger screen to operate the touch interface. This
unit would be good for smaller classrooms. For very large lecture
theatres, the image could be relayed to a large conventional projector (as I set up for the Multinet'95 Conference).
Like other short throw units, this has the limitation you have to bolt the projector to the wall just above where you want the image. But it has the advantage, as with other short throw projectors, that it will work with a shiny whiteboard surface. An additional requirement with the touch unit is that the infra-red detector has to be installed by a technician.
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