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Appendix
Projected Image Size for Optional Lenses
NOTE: The lens shift is not
adjustable on the optional short
throw lens. It is fixed at zero
degrees.
The formulas for distance to the screen are:
Long throw lens distance (ft) = diagonal image size (ft) ÷ .25
Short throw lens distance (ft) = diagonal image size (ft) ÷ 1.042
Table 4:
Diagonal Image Size and Width vs Distance to Screen-
Long Throw and Short Throw Lenses
Diagonal
Image Size
(inches)
Distance to screen
Image Width
(inches)
Long Throw
(feet)
Short Throw
(feet)
300 240 100 N/A
240 192 80 N/A
180 144 60 N/A
144 115 48 11.5
120 96 40 9.6
96 77 32 7.7
72 58 24 5.8
60 48 20 4.8
48 38 N/A 3.8