BenQ Digital Projector MS612ST - Manual (Page 14)

Positioning your projector 14
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.
For example, if you are using a 120-inch screen, the recommended projection distance is
2422 mm and the vertical offset is 91 mm.
If your measured projection distance is 3.0 m (3000 mm), the closest match in the "Distance
from screen (mm)" column is 3028 mm. Looking across this row shows that a 150'' (about
3.8 m) screen is required.
Projection dimensions
Refer to "Dimensions" on page 62 for the center of lens dimensions of this projector before
calculating the appropriate position.
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)
40 1016 813 610 734 807 881 30
50 1270 1016 762 917 1009 1101 38
60 1524 1219 914 1101 1211 1321 46
80 2032 1626 1219 1468 1615 1761 61
100 2540 2032 1524 1835 2018 2202 76
120 3048 2438 1829 2202 2422 2642 91
150 3810 3048 2286 2752 3028 3303 114
200 5080 4064 3048 3670 4037 4404 152
220 5588 4470 3353 4037 4440 4844 168
250 6350 5080 3810 4587 5046 5505 191
300 7620 6096 4572 5505 6055 6606 229
Maximum zoom Minimum zoom
Projection distance
Center of lens
Screen
Vertical offset