When working out the distance to place the screen from the projector is it a standard formula for all systems or do NEC/Barco/Seleco all use a different one?
Its most likely a NEC DP1200 (when I get a car, but thats another story )
The NEC is a CRT projector though not a LCD so distances are critical, the landlord from my local has got an old Seleco 150 that he wants me to give him an hand putting it up (free beer ) but I need to know how to work out the distances.