Obtaining A Preferred Projected Image Size; Projection Dimensions - BenQ TH671ST User Manual

Obtaining a preferred projected image size

The distance from the projector lens to the screen, the zoom setting (if available), 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
Screen size
Diagonal
Inch mm
60 1524
70 1778
80 2032
90 2286
100 2540
110 2794
120 3048
140 3556
160 4064
180 4572
For example, if you are using a 120-inch screen, the recommended projection distance is 2019 mm.
• If your measured projection distance is 2300 mm, the closest match in the
column is 2355 mm. Looking across this row shows that a 140'' (about 3.6 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.
16:9 Screen diagonal
H
W
Vertical offset
H (mm) W (mm)
747 1328
872 1550
996 1771
1121 1992
1245 2214
1370 2435
1494 2657
1743 3099
1992 3542
2241 3985
Screen
Center of lens
Projection distance
Projection distance (mm)
Min. distance
Average
(max. zoom)
917 1009
1069 1178
1222 1346
1375 1514
1528 1682
1680 1851
1833 2019
2139 2355
2444 2692
2750 3028
Offset lens position
Max. distance
(mm)
(min. zoom)
1102
1286
1470
1654
1837
2021
2205
2572
2940
3307
"Projection distance (mm)"
Positioning your projector
19
22
25
28
31
34
37
44
50
56
13