NEC Display Solutions of America, Inc.
VT800 Installation Guide
Ceiling Mounted and Desktop
Rev 1.3
www.necdisplay.com
VT800
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 Bottom
2.85"
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Top
5.63"
6.01"
Lens Offset From
Mount Pipe
D
D
3.74
Desktop
Distance Chart for popular 4:3 screens
Note:
For screen sizes not indicated on the projection
Diagonal Width(W) Height (H)
inches
inches
inches
inches
30
24
18
6
34
-
41
10.2 -
8.5
60
48
36
12
69
-
83
10.1 -
8.4
67
53.6
40.2
14
78
-
93
10.1 -
8.4
72
57.6
43.2
15
83
-
101
10.0 -
8.4
84
67.2
50.4
17
98
-
118
10.0 -
8.4
90
72
54
19
105
-
126
10.0 -
8.4
100
80
60
21
117
-
140
10.0 -
8.4
120
96
72
25
140
-
169
10.0 -
8.3
150
120
90
31
176
-
211
10.0 -
8.3
180
144
108
37
211
-
254
10.0 -
8.3
210
168
126
43
247
-
297
10.0 -
8.3
240
192
144
50
282
-
339
9.9
-
8.3
270
216
162
56
318
-
382
9.9
-
8.3
300
240
180
62
353
-
425
9.9
-
8.3
Screen Size (4:3)
-6
inches
-3
degrees
inches
B
C
w ide - tele
D
α
w ide - tele
-6
-7
-8
-8
-9
-11
-14
-17
-20
-23
-25
-28
tables, use the formulas on page 1.
