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Preparations
Projection Distance and Size
Use the figures, tables, and formulas below to determine the projection size and projection
distance. (Projection sizes are approximate values for full-size picture with no keystone
adjustment.)
a is the distance between the lens and the screen, and corresponds to a range of 1.6m to
13.7m (63.0 inches to 539.4 inches). H is the height from the image bottom to the center of
the lens.
1 inch=2.54 cm
Screen
As seen from above
90°
As seen from the side
a
90°
H
Lens center
projection
size
(inches)
projection distance a (m)
height (H)
(cm)
min length
(zooming max)
max length
(zooming min)
min length
(zooming max)
max length
(zooming min)
40 1.6 1.8 8.7 8.8
60 2.3 2.8 12.5 13.1
80 3.1 3.7 16.8 17.3
100 4 4.7 21.7 21.9
150 6 7.3 32.5 32.9
200 8 9.4 41.9 43.9
250 10 11.7 52.4 54.8
300 12 14.1 65 65.8
projection
size
(inches)
projection distance a (inch)
height (H)
(inch)
min length
(zooming max)
max length
(zooming min)
min length
(zooming max)
max length
(zooming min)
40 63 71 3 3
60 91 110 5 5
80 120 150 7 7
100 160 190 9 9
150 240 290 13 13
200 320 370 16 17
250 390 460 21 22
300 470 560 26 26