Imagine that you are a camera that is mounted on a "x/y" positioning device. Your field of view is an area about the size of big grapefruit. The positioning device can point you at any part of the screen. You know where the image should be and you have control of the convergence and geometry circuits. Which projector would be most compatable with this situation? Only the part of the screen that the camera is "looking' at moves for geometry/convergence adjustments. Not like when a "skew" adjustment is made where the whole screen moves. Is there such a thing?