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2 • Using the Projector
68
Fixed Short Throw Lens Calculations (ELPLR01)
To determine the diagonal size of an image when you know the
projection distance:
❐ Inches:
Diagonal size = (1.239 × projection distance) + 3.415
❐ Centimeters:
Diagonal size = (3.1470 × projection distance) + 8.6741
To determine the projection distance when you know the diagonal size
of the screen image:
❐ Inches:
Projection distance = (0.807 × diagonal size) - 2.756
❐ Centimeters:
Projection distance = (2.0497
×
diagonal size) - 7.0002
80009000.book Page 68 Monday, November 1, 1999 9:35 AM