Asus B1M E-Manual page 30

Screen size and projection distance table
Adjust the LED projector's distance from the screen using the table
below.
screen size
Screen size - 16:10
(inches)
30
40
60
80
100
120
140
160
30
projection distance
(millimeters)
762
1016
1524
2032
2540
3048
3556
4064
LED projector
Projection distance
(meters)
0.58
0.78
1.16
1.55
1.94
2.33
2.71
3.10
LED projector E-Manual