Visual Systems Division
Technical Bulletin
MultiSync
MT820/MT1020 Installation Data
Desk Top and Ceiling Mount
Page2
Projection Distance and Screen Size for Ceiling Mount
The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of
installation.
Ceiling Mount System
Zoom Lens (Wide)
Note:
For screen sizes of 60 to 300 inches not indicated on the projection tables, use the formulas on page 1.
All calculations are with the lens (Wide setting).
α
degree
8.86
8.81
8.77
8.75
8.73
8.70
8.67
8.65
8.64
8.63
8.62
8.61
β
(=sin
α)
0.1539
0.1531
0.1525
0.1521
0.1518
0.1513
0.1508
0.1504
0.1503
0.1500
0.1499
0.1497
γ
(=cos
α
)
0.9881
0.9882
0.9883
0.9884
0.9884
0.9885
0.9886
0.9886
0.9886
0.9887
0.9887
0.9887
Screen Width
inch
48
56
64
72
80
96
120
144
160
192
216
240
Diagonal (4:3)
inch
60
70
80
90
100
120
150
180
200
240
270
300
A
inch
94.4
110.8
127.1
143.4
159.6
192.1
241.1
289.9
322.5
387.7
436.5
485.4
mm
2398.6
2813.2
3227.8
3642.4
4053.0
4880.2
6123.0
7362.8
8191.0
9846.4
11086.2 12329.0
B
inch
20.1
22.6
25.0
27.4
29.8
34.7
41.9
49.2
54.1
63.7
71.0
78.3
mm
511.4
573.0
634.5
696.0
757.6
880.7
1065.3
1249.9
1373.0
1619.1
1803.7
1988.4
C
inch
93.3
109.4
125.6
141.7
157.7
189.9
238.3
286.6
318.8
383.3
431.5
479.9
mm
2370
2780
3190
3600
4006
4824
6053
7279
8098
9735
10961
12190
D
inch
0.0
0.6
1.2
1.7
2.3
3.5
5.2
6.9
8.1
10.4
12.1
13.8
mm
0.5
15.1
29.7
44.3
59.0
88.2
132.0
175.9
205.1
263.6
307.4
351.3
α
B
6.93"
C
D
A
Screen Center
4.38"
Horizontal
Lens
Offset
MultiSync MT1020
