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Projection Distance and Size
Use the figures, tables, and formulas below to determine the projection size and pro-
jection distance. (Projection sizes are approximate values for full-size picture with no
keystone adjustment.)
Projection
size
(inches)
Wide Tele Offset
distance (a) distance (a) height (H)
(m) (feet) (m) (feet) (cm) (feet)
30 1.19 3.90 1.31 4.30 6.86 0.22
40 1.58 5.20 1.75 5.73 9.14 0.30
60 2.38 7.80 2.62 8.60 13.72 0.45
70 2.77 9.10 3.06 10.03 16.00 0.52
80 3.17 10.40 3.50 11.46 18.29 0.60
90 3.57 11.70 3.93 12.90 20.57 0.67
100 3.96 13.00 4.37 14.33 22.86 0.75
120 4.75 15.60 5.24 17.20 27.43 0.90
150 5.94 19.50 6.55 21.49 34.29 1.12
180 7.13 23.39 7.86 25.79 41.15 1.35
250 9.91 32.49 10.92 35.82 57.15 1.87
300 11.89 38.99 13.11 42.99 68.58 2.25
As seen from above
As seen from the side
a
90
H
90
Screen
Lens center
a is the distance (m, feet) between the lens and the screen, and corresponds to a range
of 1.19 m to 11.89 m (3.90 ft. to 38.99 ft.). H is the height (cm, feet) from the image bot-
tom to the center of the lens.
Placement (Continued)