BenQ PE8720 - Manual (Page 15)

15 Positioning your projector
Eng
lish
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 which screen aspect 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.
This model projector has a 120% vertical height offset between the projector lens center and the angle of the
edge of the projected image as indicated with the word "Offset" in the tables below. The PE8720 also has a built-
in motorised vertical Lens shift control for fine adjustment.
Installation for a 16:9 ratio screen
16:9 (widescreen) ratio screen dimension table
The above numbers are approximate and may be slightly different from the actual measurements. Only
the recommended screen sizes are listed. If the your screen size is not in the table above, please contact
your BenQ dealer for assistance.
A n examination of the table reveals that you can place the projector lens in the range from 2 to 10.8m distance
from the screen, which will give you a projected image from 50" (1.11 x 0.62m) to 200" (4.43 x 2.49m) full
screen.
Screen
H
eight
Projection Distance
Diagonal
Offset
Ceiling
Center of the lens
Ceiling Installation
Screen
Heigh
t
Offset
Floor
Center of the lens
Diagonal
Projection Distance
Floor Installation
Screen Dimensions (inch / cm) Projection Distance (inch / cm) Offset (inch / cm)
Diagonal Width Height
Min distance
(with max zoom)
Max distance
(with min zoom)
Upper Lower
50 / 127 44 / 111 25 / 62 78 / 199 106 / 270 2.5 / 6.2 -27.0 / -68.5
60 / 152 52 / 133 29 / 75 94 / 239 128 / 324 2.9 / 7.5 -32.4 / -82.2
70 / 178 61 / 155 34 / 87 110 / 279 149 / 379 3.4 / 8.7 -37.8 / -95.9
80 / 203 70 / 177 39 / 100 126 / 319 171 / 433 3.9 / 10.0 -43.1 / -109.6
90 / 229 78 / 199 44 / 112 141 / 359 192 / 487 4.4 / 11.2 -48.5 / -123.3
100 / 254 87 / 221 49 / 125 156 / 400 213 / 541 4.9 / 12.5 -53.9 / -137.0
110 / 279 96 / 244 54 / 137 172 / 438 234 / 595 5.4 / 13.7 -59.3 / -150.7
120 / 305 105 / 266 59 / 149 188 / 478 256 / 649 5.9 / 14.9 -64.7 / -164.4
130 / 325 113 / 288 64 / 162 204 / 518 277 / 703 6.4 / 16.2 -70.1 / -178.1
140 / 356 122 / 310 69 / 174 220 / 558 298 / 757 6.9 / 17.4 -75.5 / -191.8
150 / 381 131 / 332 74 / 187 235 / 598 319 / 811 7.4 / 18.7 -80.9 / -205.5
160 / 406 139 / 354 78 / 199 251 / 638 341 / 865 7.8 / 19.9 -86.3 / -219.2
170 / 432 148 / 376 83 / 212 267 / 677 362 / 919 8.3 / 21.2 -91.7 / -232.9
180 / 457 157 / 398 88 / 224 282 / 717 383 / 973 8.8 / 22.4 -97.1 / -246.6
190 / 483 166 / 421 93 / 237 298 / 757 405 / 1028 9.3 / 23.7 -102.5 / -260.3
200 / 508 174 / 443 98 / 249 314 / 797 426 / 1082 9.8 / 24.9 -107.9 / -274.0
250 / 635 218 / 553 123 / 311 392 / 996 532 / 1352 12.3 / 31.1 -134.8 / -342.4
300 / 762 261 / 664 147 / 374 471 / 1195 639 / 1622 14.7 / 37.4 -161.8 / -410.9
PE8720-en.book Page 15 Friday, May 13, 2005 5:19 PM