Calculating Image Size And Projection Distance - Epson PowerLite 8000i User Manual

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 69 for more information.)
Standard Lens Calculations
To determine the maximum and minimum diagonal size of an image
when you know the projection distance:
To determine the projection distance when you know the diagonal size
of the screen image:
Inches:
Maximum diagonal size = (0.676
Minimum diagonal size = (0.483
Centimeters :
Maximum diagonal size = (1.71
Minimum diagonal size = (1.22
Inches:
Maximum projection distance = (2.070
Minimum projection distance = (1.480
Centimeters:
Maximum projection distance = (5.257
Minimum projection distance = (3.759
projection distance) + 2.293
projection distance) + 1.639
projection distance) + 5.824
projection distance) + 4.163
diagonal size) - 3.393
diagonal size) - 3.393
diagonal size) - 8.6182
diagonal size) - 8.6182
Positioning the Projector
65