BenQ TH683 - Manual (Page 17)

Positioning your projector 17
Obtaining a preferred projected image size
The projected image size is determined by the distance from the projector lens to the
screen, the zoom setting, and the video format.
Projection dimensions
Refer to "Dimensions" on page 68 for the center of lens dimensions of this projector
before calculating the appropriate position.
There is 5% tolerance among these numbers due to optical component variations. BenQ
recommends that if you intend to permanently install the projector, you should physically test
the projection size and distance using the actual projector 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 dimensions Projection distance [mm]
Offset
(full height
definition)
[mm]
Diagonal [inch
(mm)]
Height
[mm]
Width
[mm]
Min
distance
(with max
zoom)
Average
Max
distance
(with mim
zoom)
50 (1270) 623 1107 1273 1461 1649 93
60 (1524) 747 1328 1528 1753 1979 112
70 (1778) 872 1550 1782 2046 2309 131
80 (2032) 996 1771 2037 2338 2639 149
90 (2286) 1121 1992 2291 2630 2969 168
100 (2540) 1245 2214 2546 2922 3299 187
110 (2794) 1370 2435 2800 3214 3628 205
120 (3048) 1494 2657 3055 3507 3957 224
130 (3302) 1619 2878 3310 3799 4288 243
140 (3556) 1743 3099 3564 4091 4618 262
150 (3810) 1868 3321 3819 4383 4948 280
160 (4064) 1992 3542 4073 4676 5278 299
170 (4318) 2117 3763 4328 4968 5608 318
180 (4572) 2241 3985 4583 5260 5937 336
190 (4826) 2366 4206 4837 5552 6267 355
200 5080 2491 4428 5092 5844 6597 374
250 (6350) 3113 5535 6365 7306 8245 467
300 (7620) 3736 6641 7638 8767 9896 560
Floor Installation
: Screen : Center of lens
Ceiling Installation
: Screen : Center of lens