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Positioning your projector 15
Obtaining a preferred projected image size
The distance from the projector lens to the screen, the zoom setting, and the video format
each factors in the projected image size.
Projection dimensions
Refer to "Dimensions" on page 57 for the center of lens dimensions of this projector
before calculating the appropriate position.
The screen aspect ratio is 4:3 and the projected picture is 4:3:
For example, if you are using an 120-inch screen, the recommended projection distance is
4246 mm and the vertical offset is 137 mm.
If your measured projection distance is 5.0 m (5000 mm), the closest match in the
"Distance from screen (mm)" column is 5308 mm. Looking across this row shows that a
150'' (about 3.8 m) screen is required.
All measurements are approximate and may vary from the actual sizes.
BenQ recommends that if you intend to permanently install the projector, you should physically test the
projection size and distance using the actual projector in situ before you permanently install it, so as to make
allowance for this projector's optical characteristics. This will help you determine the exact mounting position
so that it best suits your installation location.
Screen size Distance from screen (mm)
Vertical
offset
(mm)
Diagonal
W
(mm)
H
(mm)
Min length
Average
Max length
Inch mm
(max.
zoom)
(min. zoom)
40 1016 813 610 1231 1415 1600 46
50 1270 1016 762 1538 1769 2000 57
60 1524 1219 914 1846 2123 2400 69
70 1778 1422 1067 2154 2477 2800 80
80 2032 1626 1219 2462 2831 3200 91
90 2286 1829 1372 2769 3185 3600 103
100 2540 2032 1524 3077 3538 4000 114
120 3048 2438 1829 3692 4246 4800 137
150 3810 3048 2286 4615 5308 6000 171
200 5080 4064 3048 6154 7077 8000 229
250 6350 5080 3810 7692 8846 10000 286
300 7620 6096 4572 9231 10615 12000 343
Maximum zoom Minimum zoom
Projection distance
Center of lens
Screen
Vertical offset