BenQ TH670s - Manual (Page 18)

Positioning your projector 18
Projection dimensions
Refer to "Dimensions" on page 70 for the center of lens dimensions of this projector
before calculating the appropriate position.
For example, If you are using a 60-inch screen, the projection distance is 2194 mm and
with a vertical offset of 120 mm.
If your measured projection distance is 5.5 m (5500 mm), the closest match in the
"Distance from screen (mm)" column is 5485 mm. Looking across this row shows that a
150'' (about 3810 mm) 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)
30 762 664 374 994 1097 1200 60
40 1016 886 498 1325 1463 1600 80
60 1524 1328 747 1988 2194 2400 120
80 2032 1771 996 2651 2926 3200 159
100 2540 2214 1245 3313 3657 4000 199
120 3048 2657 1494 3976 4388 4800 239
150 3810 3321 1868 4970 5485 6000 299
200 5080 4428 2491 6627 7314 8000 399
250 6350 5535 3113 8283 9142 10000 498
300 7620 6642 3736 9940 10970 12000 598
16:9 Screen diagonal
Projection distance
Center of lens
Screen
Vertical offset
H
W