BenQ TH690ST, User Manual

Page: 12 / 53

12 Positioning your projector
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
• The screen aspect ratio is 16:9 and the projected picture is in a 16:9 aspect ratio
For example, if you are using a 120-inch screen, the recommended projection distance is 2019 mm.
If your measured projection distance is 150 cm, the closest match in the
"Distance from screen (mm)"
column is 1514 mm. Looking across this row shows that a 90'' (about 2.3 m) screen is required.
Screen size Distance from screen (mm)
Vertical offset
(Lowest/Highest
lens position) (mm)
Diagonal
H (mm) W (mm)
Min length
Average
Max length
Inch mm (max. zoom) (min. zoom)
30 762 374 664 458 505 551 10
40 1016 498 886 611 673 735 13
50 1270 623 1107 764 841 919 16
60 1524 747 1328 917 1009 1102 20
70 1778 872 1550 1069 1178 1286 23
80 2032 996 1771 1222 1346 1470 26
90 2286 1121 1992 1375 1514 1654 30
100 2540 1245 2214 1528 1682 1837 33
110 2794 1370 2435 1680 1851 2021 36
120 3048 1494 2657 1833 2019 2205 40
130 3302 1619 2878 1986 2187 2389 43
140 3556 1743 3099 2139 2355 2572 46
150 3810 1868 3321 2291 2524 2756 49
160 4064 1992 3542 2444 2692 2940 53
170 4318 2117 3763 2597 2860 3124 56
180 4572 2241 3985 2750 3028 3307 59
190 4826 2366 4206 2902 3197 3491 63
200 5080 2491 4428 3055 3365 3675 66
To optimize your projection quality, we suggest doing the projection by referring to the values listed in the non-gray
rows.
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.
H
W
Projection distance
Center of lens
Screen
16:9 Screen diagonal
Vertical offset