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Visual Systems Division
Technical Bulletin
MultiSync MT820/MT1020 Installation Data
Desk Top and Ceiling Mount
Projection Distance and Screen Size for Desktop
The following diagram shows the relationship between projector position and the screen.
Desktop System
Screen Center
Desk Top Level
Screen Bottom
Zoom Lens (Telephoto)
degree
6.78
(=sin
0.1181
0.9930
(=cos )
Screen Width
inch
48
Diagonal (4:3)
inch
60
A
inch
123.1
mm
3126.9
C
inch
122.2
mm
3105
D
inch
0.0
mm
0.5
E
inch
18.0
mm
456.4
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 (Telephoto).
A
6.75
6.73
6.72
0.1176
0.1172
0.1170
0.1168
0.9931
0.9931
0.9931
0.9932
56
64
72
70
80
90
144.2
165.3
186.3
3663.4
4199.0
4732.5
5269.1
143.2
164.2
185.0
3638
4170
4700
0.6
1.2
1.7
15.1
29.7
44.3
20.4
22.8
25.2
518.0
579.5
641.0
C
6.71
6.69
6.67
0.1165
0.1162
0.1160
0.9932
0.9932
0.9933
80
96
120
100
120
150
207.4
249.6
312.8
6339.2
7945.8
9552.4
206.0
247.9
310.7
5233
6296
7892
2.3
3.5
5.2
59.0
88.2
132.0
27.7
32.5
39.8
702.6
825.7
1010.3
1194.9
6.66
6.65
6.64
0.1159
0.1157
0.1156
0.9933
0.9933
0.9933
144
160
192
180
200
240
376.1
418.2
502.5
10622.5 12764.7 14371.4 15979.0
373.5
415.4
499.2
9488
10551
12679
14275
6.9
8.1
10.4
175.9
205.1
263.6
47.0
51.9
61.6
1318.0
1564.1
1748.7
6.64
6.63
0.1155
0.9933
216
240
270
300
565.8
629.1
562.0
624.9
15872
12.1
13.8
307.4
351.3
68.8
76.1
1933.4
Page5
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