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Positioning the Projector
65
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 68 for more information.)
To determine the minimum and maximum diagonal size of an image
when you know the projection distance:
❐ Inches:
Maximum diagonal size = (0.6124 × projection distance) + 1.5264
Minimum diagonal size = (0.4556 × projection distance) + 1.1410
❐ Centimeters:
Maximum diagonal size = (0.6124 × projection distance) + 3.8771
Minimum diagonal size = (0.4556 × projection distance) + 2.8981
To determine the projection distance when you know the diagonal size
of the screen image:
❐ Inches:
Maximum projection distance = (2.1949 × diagonal size) - 2.5044
Minimum projection distance = (1.6328 × diagonal size) - 2.4923
❐ Centimeters:
Maximum projection distance = (2.1949 × diagonal size) - 6.3612
Minimum projection distance = (1.6328 × diagonal size) - 6.3304