Visual Systems
LT157/158 Installation Data
Desktop and Ceiling Mount
ver 1.5
Page
3
Projection Distance and Screen Size for Desktop
The following diagram shows the relationship between projector position and the screen.
Distances are in inches. For millimeters multiply by 25.4.
Desktop Setup
D
B
α
Screen Ctr
Scrn Bottom
Lens Ctr
Throw Distance
C
1.6"
Projector Feet
Distance Chart
B
D
Diagonal
Width(H)
Height (V)
inches
inches
inches
inches
inches
25
20
15
6.0
NA - 45.9
1.5
NA - 7.4
40
32
24
9.5
62.1 - 75.0
2.5
8.7 - 7.3
60
48
36
14.3
94.4 - 113.8
3.7
8.6 - 7.2
67
53.6
40.2
16.0
105.7 - 127.4
4.1
8.6 - 7.2
72
57.6
43.2
17.2
113.8 - 137.1
4.4
8.6 - 7.1
84
67.2
50.4
20.1
133.2 - 160.4
5.1
8.6 - 7.1
90
72
54
21.5
142.9 - 172.0
5.5
8.5 - 7.1
100
80
60
23.9
159.1 - 191.4
6.1
8.5 - 7.1
120
96
72
28.6
191.4 - 230.3
7.4
8.5 - 7.1
150
120
90
35.8
240.0 - 288.5
9.2
8.5 - 7.1
180
144
108
43.0
288.5 - 346.7
11.0
8.5 - 7.1
210
168
126
50.1
337.0 - 404.9
12.9
8.5 - 7.1
240
192
144
57.3
385.5 - 463.1
14.7
8.5 - 7.1
270
216
162
64.5
434.0 - NA
16.5
8.4 - NA
300
240
180
71.6
482.5 - NA
18.4
8.4 - NA
inches
α
degrees
Screen Size (4:3)
wide - tele
C
wide - tele
Note:
For screen sizes not indicated on the projection tables, use the formulas on page 1.
