Epson 8000i - Manual (Page 75)

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 69 for more information.)
Standard Lens Calculations
To determine the maximum and minimum diagonal size of an image
when you know the projection distance:
❐ Inches:
Maximum diagonal size = (0.676
× projection distance) + 2.293
Minimum diagonal size = (0.483
×
projection distance) + 1.639
❐ Centimeters :
Maximum diagonal size = (1.71
×
projection distance) + 5.824
Minimum diagonal size = (1.22 × projection distance) + 4.163
To determine the projection distance when you know the diagonal size
of the screen image:
❐ Inches:
Maximum projection distance = (2.070
×
diagonal size) - 3.393
Minimum projection distance = (1.480
×
diagonal size) - 3.393
❐ Centimeters:
Maximum projection distance = (5.257
×
diagonal size) - 8.6182
Minimum projection distance = (3.759
×
diagonal size) - 8.6182
80009000.book Page 65 Monday, November 1, 1999 9:35 AM