Obtaining A Preferred Projected Image Size - BenQ X500I User Manual

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
16:9 Screen diagonal
H
W
Vertical offset (A)*
• *The vertical offset value is the vertical distance from the bottom edge of the image (when the projector
is placed on a table, diagram on the left), or top edge of the image (when the projector is ceiling
mounted, diagram on the right) to the centerline of lens.
• Due to the lens optical characteristics, every projector has its vertical offset ratio. The vertical offset
value normally gets larger while the projection distance increases.
Screen size
Diagonal
Inch mm
60 1524
70 1778
80 2032
90 2286
100 2540
110 2794
120 3048
For example, if you are using a 120-inch screen, the recommended projection distance is 2019
mm.
If your measured projection distance is 200 cm, the closest match in the
(mm)" column is 2019 mm. Looking across this row shows that a 120'' (about 3.0 m) screen is
required. The projected image will be slightly higher/lower than the lens centerline with 37 mm
vertical offset.
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.
Screen
Centerline of lens
Projection distance
H (mm) W (mm)
(max. zoom)
747 1328
872 1550
996 1771
1121 1992
1245 2214
1370 2435
1494 2657
Vertical offset (A)*
16:9 Screen diagonal
H
W
Distance from screen (mm)
Min length
Average
917 1009
1069 1178
1222 1346
1375 1514
1528 1682
1680 1851
1833 2019
Projection distance
Centerline of lens
Screen
*Vertical offset (A)
Max length (Lowest/Highest
lens position) (mm)
(min. zoom)
1102
1286
1470
1654
1837
2021
2205
"Distance from screen
Positioning your projector
19
22
25
28
31
34
37
15