Obtaining A Preferred Projected Image Size - BenQ x3100i 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
30 762
40 1016
50 1270
60 1524
80 2032
95 2413
100 2540
110 2794
120 3048
130 3302
140 3556
150 3810
160 4064
170 4318
180 4572
190 4826
200 5080
250 6350
300 7620
For example, if you are using a 120-inch screen, the recommended projection distance is 3520
mm.
If your measured projection distance is 300 cm, the closest match in the
(mm)" column is 2933 mm. Looking across this row shows that a 100'' (about 2.5 m) screen is
Screen
Centerline of lens
Projection distance
H (mm) W (mm)
(max. zoom)
374 664
498 886
623 1107
747 1328
996 1771
1183 2103
1245 2214
1370 2435
1494 2657
1619 2878
1743 3099
1868 3321
1992 3542
2117 3763
2241 3985
2366 4206
2491 4428
3113 5535
3736 6641
Vertical offset (A)*
16:9 Screen diagonal
H
W
Distance from screen (mm)
Min length
Average
764 880
1018 1173
1273 1467
1528 1760
2037 2347
2419 2787
2546 2933
2800 3227
3055 3520
3310 3813
3564 4107
3819 4400
4073 4693
4328 4987
4583 5280
4837 5573
5092 5867
6365 7333
7638 8800
Projection distance
Centerline of lens
Screen
*Vertical offset (A)
Max length (Lowest/Highest
lens position) (mm)
(min. zoom)
996
1328
1660
1992
2657
3155
3321
3653
3985
4317
4649
4981
5313
5645
5977
6309
6641
8302
9962
"Distance from screen
Positioning your projector
37
50
62
75
100
118
125
137
149
162
174
187
199
212
224
237
249
311
374
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