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2 • Using the Projector
62
Long Throw Zoom Lens Calculations
If you are using the optional long throw zoom lens, use the following
formulas instead:
To determine the minimum and maximum diagonal size of an image
when you know the projection distance:
● Inches:
Maximum diagonal size = (0.4742 × projection distance) + 3.2489
Minimum diagonal size = (0.2849 × projection distance) + 1.8968
● Centimeters:
Maximum diagonal size = (1.2045 × projection distance) + 8.2522
Minimum diagonal size = (0.7236 × projection distance) + 4.8179
To determine the projection distance when you know the diagonal size
of the screen image:
● Inches:
Maximum projection distance = (3.5094 × diagonal size) - 6.6568
Minimum projection distance = (2.1090 × diagonal size) - 6.8519
● Centimeters:
M
aximum projection distance = (8.9139 × diagonal size) - 16.9083
M
inimum projection distance = (5.3569 × diagonal size) - 17.4038
5300.book Page 62 Tuesday, April 13, 1999 4:19 PM