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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 71 for the center of lens dimensions of this projector before
calculating the appropriate position.
For example, if you are using a 120-inch screen, the recommended projection distance is
4457 mm and the vertical offset is 91 mm - 274 mm.
If your measured projection distance is 5.0 m (5000 mm), the closest match in the "Distance
from screen (mm)" column is 4457 mm or 5571 mm. Looking across this row shows that a
120'' (about 3.0 m) or 150'' (about 3.8 m) screen is required.
There is 3% tolerance among these numbers due to optical component variations.
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)
(min.) (max.)
40 1016 813 610 1143 1486 1829 30 91
50 1270 1016 762 1429 1857 2286 38 114
60 1524 1219 914 1714 2229 2743 46 137
80 2032 1626 1219 2286 2971 3657 61 183
100 2540 2032 1524 2857 3714 4571 76 229
120 3048 2438 1829 3429 4457 5486 91 274
150 3810 3048 2286 4286 5571 6857 114 343
200 5080 4064 3048 5714 7429 9143 152 457
220 5588 4470 3353 6286 8171 10057 168 503
250 6350 5080 3810 7143 9286 11429 191 572
300 7620 6096 4572 8571 11143 13714 229 686
Maximum zoom Minimum zoom
Projection distance
Center of lens
Screen
Vertical offset
15


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