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. BenQ has provided separate tables of dimensions for both 16:9 and 4:3 screen ratios to assist you in determining the ideal location for your projector.
1.Determine the aspect ratio of your screen, (16:9 or 4:3) ?
2.Select the Screen Size you desire from the 16:9 ratio screen dimension table or 4:3 ratio screen dimension table below, according to what screen type you have. Install the projector at a distance from the screen corresponding to between the Min. and Max. Projection Distance values in the table.
3.Decide the exact height of your projector.
For example, if you are using a 16:9 screen with 80 inches diagonal, you are suggested to place your projector within a range between 2.76m to 3.39m from the screen. The exact height of your projector will be 33 to 34cm above or below your screen from the center of the lens.
Ceiling installation for a 16:9 ratio screen
Screen Size
Offset |
Height |
Ceiling
Projection Distance
Center of the lens
Screen
Floor installation for a 16:9 ratio screen
Screen Size
Height |
Offset |
Screen
Center of the lens
Projection Distance
Floor
16:9 (widescreen) ratio screen dimension table
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| Screen Size |
| Projection Distance | Height Offset | ||||
Type (inch) |
| Height (cm) |
| Width (cm) | Min. (cm) | Max. (cm) | Tele (cm) | Wide (cm) |
50 |
| 62 |
| 111 | 173 | 212 | 21 | 20 |
60 |
| 75 |
| 133 | 207 | 254 | 25 | 25 |
70 |
| 87 |
| 155 | 242 | 297 | 29 | 29 |
80 |
| 100 |
| 177 | 276 | 339 | 34 | 33 |
90 |
| 112 |
| 199 | 311 | 381 | 38 | 37 |
100 |
| 125 |
| 221 | 345 | 424 | 42 | 41 |
110 |
| 137 |
| 244 | 380 | 466 | 46 | 45 |
120 |
| 149 |
| 266 | 414 | 508 | 50 | 49 |
130 |
| 162 |
| 288 | 449 | 551 | 55 | 53 |
140 |
| 174 |
| 310 | 483 | 593 | 59 | 57 |
150 |
| 187 |
| 332 | 518 | 636 | 63 | 61 |
160 |
| 199 |
| 354 | 553 | 678 | 67 | 65 |
170 |
| 212 |
| 376 | 587 | 720 | 71 | 70 |
180 |
| 224 |
| 398 | 621 | 763 | 76 | 74 |
190 |
| 237 |
| 421 | 656 | 805 | 80 | 78 |
200 |
| 249 |
| 443 | 691 | 847 | 84 | 82 |
An examination of the table reveals that you can place the projector lens in the range from 1.73 to 8.47m distance from the screen, which will give you a projected image from 1.11 x 0.62m to 4.43 x 2.49m full screen.
12 Positioning your projector
