NEC Solutions (America), Inc.
Visual Systems Division
VT480/580 Installation Guide
Ceiling Mounted and Desktop
Rev 1.2
www.necvisualsystems.com
VT480/580
Page 2 of 6
Diagrams and Distance Charts
The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of
installation.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling Mounted
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Top
5.26"
5.68"
Lens Offset From
Mount Pipe
3.27"
D
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Bottom
2.57"
D
Desktop
Screen Size (4:3)
Diag
W
H
inches inches inches inches
inches
30
24
18
6
-3
60
48
36
13
-5
72
57.6
43.2
15
-6
84
67.2
50.4
18
-7
90
72
54
19
-8
100
80
60
21
-9
120
96
72
26
-10
150
120
90
32
-13
180
144
108
38
-16
200
160
120
43
-17
250
200
150
53
-22
300
240
180
64
-26
356 - 431
9.9 - 8.3
236 - 286
10.0 - 8.3
296 - 359
9.9 - 8.3
176 - 214
10.0 - 8.3
212 - 257
10.0 - 8.3
117 - 142
10.0 - 8.3
141 - 171
10.0 - 8.3
98 - 119
10.0 - 8.4
105 - 128
10.0 - 8.4
69 - 84
10.1 - 8.4
83 - 102
10.0 - 8.4
inches
degrees
35 - 43
10.2 - 8.5
B
C
wide - tele
D
α
wide - tele
Distance Chart for popular 4:3 screens
Note:
For screen sizes not indicated on the projection
tables, use the formulas on page 1.