Calculating Image Size And Projection Distance - Epson PowerLite 7300 User Manual

When projecting from the ceiling, align the lens as closely as possible
with the top of your screen:

Calculating Image Size and Projection Distance

The distance between the projector and the screen determines the
actual image size. To determine the exact distance required for a
particular image size (or to determine the size of an image at a
particular distance), use the formulas given below. (Remember that the
size of the image can be changed by rotating the zoom ring; see
page 63 for more information.)
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2 • Using the Projector