NEC VT49 Installation Manual page 2

VT49 Installation Guide
Ceiling Mounted and Desktop
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.
www.necdisplay.com
D
Screen Top
Lens Ctr
B
Screen Ctr
Screen Ctr
B
Lens Ctr
D
Screen Bottom
Screen Size (4:3)
Diag W
inches inches inches inches
30 24
60 48
72 57.6
84 67.2
90 72
100 80
120 96
150 120
180 144
200 160
250 200
300 240
NEC Display Solutions of America, Inc.
C
Throw Distance
C
Throw Distance
2.57"
B C
H
inches
18 6 43
36 13 86
43.2 15 104
50.4 18 121
54 19 130
60 21 144
72 26 173
90 32 217
108 38 260
120 43 289
150 53 362
180 64 434
VT49
Rev 1.2
5.26"
5.68"
Lens Offset From
Mount Pipe
3.27"
D α
inches degrees
-3 8.6
-5 8.5
-6 8.4
-7 8.4
-8 8.4
-9 8.4
-10 8.4
-13 8.4
-16 8.4
-17 8.4
-22 8.4
-26 8.4
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