NEC Solutions (America), Inc.
Visual Systems Division
LT380 Installation Guide
Ceiling Mounted and Desktop
Rev 1.1
www.necvisualsystems.com
LT380
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
Desktop
Distance Chart for popular 4:3 screens
Note:
For screen sizes not indicated on the projection
tables, use the formulas on page 1.
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
16
-6
84
67.2
50.4
18
-7
90
72
54
19
-8
100
80
60
22
-9
120
96
72
26
-10
150
120
90
32
-13
180
144
108
39
-15
200
160
120
43
-17
250
200
150
54
-21
300
240
180
65
-25
B
C
wide - tele
D
α
wide - tele
inches
degrees
33 - 41
9.0 - 11.1
69 - 84
8.7 - 10.6
83 - 102
8.7 - 10.5
98 - 119
8.7 - 10.5
105 - 128
8.6 - 10.5
117 - 142
8.6 - 10.4
141 - 171
8.6 - 10.4
176 - 214
8.6 - 10.4
212 - 257
8.6 - 10.4
356 - 431
8.5 - 10.3
236 - 286
8.6 - 10.3
296 - 359
8.5 - 10.3
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Bottom
2.54"
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Top
6.30"
5.65"
Lens Offset From
Mount Pipe
2.62"
D
D
