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Calculating Throw Distance
It is important throw distance be precisely calculated for your installation using the
appropriate formula from the chart below. To calculate throw distance you must know
the screen size and the lens type installed in the projector. In general, the larger you
want the image to be the greater the distance you must allow between the lens and the
screen.
NOTES: 1) Throw distance is
measured from the screen to
the center of the projector's
front feet. 2) This
measurement is not
necessarily parallel to the
floor as the projector and
screen may be inclined. 3)
Due to lens manufacturing,
throw distance calculations
±
have a tolerance of
5%.
Table A-1 Throw Distance Formulas
Lens Throw
Throw Distance Formula
Ratio
0.73
0.7618*W+6.7624
1.45-1.8
Min. 1.4789*W-3.6096
Max. 1.8655*W-8.1977
1.8-2.5
Min. 2.0424*W-74.131
Max. 2.6076*W-16.638
2.5-4.5
Min. 2.6347*W-11.428
Max. 4.783*W-29.602
4.5-7.3
Min. 4.5126*W-6.5502
Max. 7.423*W-25.184
Where:
TD = projector distance from the screen to the center of the projector's front feet.
W = screen (image) width (cm)
Throw Distance
Screen Widths (cm)
Min.
(cm)
150
160
127
160
117
244
137
267
165
Appendix D
Max.
437
1102
889
1110
800
1118
1110
1110
1095
User's Manual
D-1
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