Visual Systems
LT157/158 Installation Data
Desktop and Ceiling Mount
ver 1.5
Page
2
Projection Distance and Screen Size for Ceiling Mount
The following shows the proper relative position of the projector and screen. Refer to the table for installation data.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling Mount Installation
D
B
α
Screen Ctr
Screen Top
Lens Ctr
5.5"
Lens Offset from
Mount Pipe
Throw Distance
C
1.57"
4.75"
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.