13
Positioning your projector
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
MX825STH
• The screen aspect ratio is 4:3 and the projected picture is in a 4:3 aspect ratio
For example, if you are using a 120-inch screen, the recommended projection distance is 1487 mm.
• If your measured projection distance is 1000 mm, the closest match in the
column is 992 mm. Looking across this row shows that a 80'' (about 2.0 m) screen is required.
Screen size
Distance from screen
(mm)
Lowest/
Highest Lens
position (mm)
Diagonal
H (mm)
W (mm)
Inch
mm
60
1524
914
1219
744 137
70
1778
1067
1422
868 160
80
2032
1219
1626
992 183
90
2286
1372
1829
1116 206
100
2540
1524
2032
1240 229
110
2794
1676
2235
1363 251
120
3048
1829
2438
1487 274
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
4:3 Screen diagonal