BenQ PE8720 - Manual (Page 16)

16 Positioning your projector
Eng
lish
Installation for a 4:3 ratio screen
4:3 (standard) 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.
An examination of the table reveals that you can place the projector lens in the range from 2.44 to 10.32m
distance from the screen, which will give you a projected image from 50" (1.02 x 0.76m) to 200" (4.06 x 3.05m).
Shifting the projection lens vertically
The vertical lens shift control provides flexibility for installing your
projector. It allows the projector to be positioned above or below the
projected images’s vertical center.
The lens shift (offset) is expressed as a percentage of the projected image
height (25% in the example above). It is measured as an offset from the
projected image's vertical center. The PE8720 is equipped with + 120%
vertical lens shift. You can shift the projection lens upwards or downwards
within the allowable range depending on your desired image position. When the LENS button on the remote
control or LENS SHIFT buttons (c or d) on the projector is pressed, an adjustment bar displays on the screen.
To raise the projected image, press the Lens Shift c button on the projector or the c button
on the remote control.
To lower the projected image, press the Lens Shift d button on the projector or the d
button on the remote control
Screen
Image Height
Projection Distance
Offset
Ceiling
Center of the lens
Diagonal
Ceiling Installation
Projection Distance
Floor
Screen
Image Height
Offset
Center of the lens
Diagonal
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 40 / 102 30 / 76 72 / 184 98 / 249 3.0 / 7.6 - 33.0 / -83.8
60 / 152 48 / 122 36 / 91 87 / 221 117 / 298 3.6 / 9.1 -39.6 / -100.6
70 / 178 56 / 142 42 / 107 102 / 258 137 / 348 4.2 / 10.7 -46.2 / -117.3
80 / 203 64 / 163 48 / 122 116 / 294 157 / 398 4.8 / 12.2 -52.8 / -134.1
90 / 229 72 / 183 54 / 137 130 / 331 176 / 448 5.4 / 13.7 -59.4 / -150.9
100 / 254 80 / 203 60 / 152 145 / 368 196 / 497 6.0 / 15.2 -66.0 / -167.6
110 / 279 88 / 224 66 / 168 159 / 405 215 / 547 6.6 / 16.8 -72.6 / -184.4
120 / 305 96 / 244 72 / 183 174 / 442 235 / 597 7.2 / 18.3 -79.2 / -201.2
130 / 325 104 / 264 78 / 198 188 / 478 254 / 646 7.8 / 19.8 -85.8 / -217.9
140 / 356 112 / 284 84 / 213 203 / 515 274 / 696 8.4 / 21.3 -92.4 / -234.7
150 / 381 120 / 305 90 / 229 217 / 552 294 / 746 9.0 / 22.9 -99.0 / -251.5
160 / 406 128 / 325 96 / 244 232 / 589 313 / 796 9.6 / 24.4 -105.6 / -268.2
170 / 432 136 / 345 102 / 259 247 / 626 333 / 845 10.2 / 25.9 -112.2 / -285.0
180 / 457 144 / 366 108 / 274 261 / 662 352 / 895 10.8 / 27.4 -118.8 / -301.8
190 / 483 152 / 386 114 / 290 275 / 699 372 / 945 11.4 / 29.0 -125.4 / -318.5
200 / 508 160 / 406 120 / 305 290 / 736 392 / 995 12.0 / 30.5 -132.0 / -335.3
250 / 635 200 / 508 150 / 381 362 / 920 489 / 1243 15.0 / 38.1 -165.0 / -419.1
300 / 762 239 / 610 180 / 457 435 / 1104 587 / 1492 18.0 / 45.7 -198.0 / -502.9
0
100%
-100%
-120%
120%
c
d
Lens Shift
PE8720-en.book Page 16 Friday, May 13, 2005 5:19 PM