BenQ MP620p - Manual (Page 20)

Positioning your projector 14
There is 3% tolerance among these numbers due to optical component variations.
4:3 Screen Diagonal Distance from Screen in mm Vertical Offset in mm
Feet Inches mm Min length
(with max.
zoom)
Average Max length
(with min.
zoom)
4 48 1219 1745 1876 2007 18
1500 2148 2199 2250 23
5 60 1524 2182 2345 2509 23
6 72 1829 2618 2815 3011 27
2000 2863 3078 3293 30
7 84 2134 3055 3284 3513 32
8 96 2438 3491 3753 4015 36
2500 3579 3848 4116 38
9 108 2743 3927 4222 4516 41
3000 4295 4617 4939 45
10 120 3048 4364 4691 5018 46
3500 5011 5387 5763 53
12 144 3658 5236 5629 6022 55
4000 5727 6157 6586 60
15 180 4572 6545 7036 7527 69
5000 7158 7695 8232 75
18 216 5486 7855 8444 9033 82
6000 8590 9234 9878 90
25 300 7620 10909 11727 12545 114
Maximum zoom Minimum zoom
Projection distance
Center of lens
Screen
Offset