Diagrams And Distance Charts; Ceiling Mounted - NEC LT30 Installation Manual

LT30/35 Installation Guide
Ceiling Mounted and Desktop

Diagrams and Distance Charts

The following diagrams show the relationship between projector position and the screen. Refer to the chart below for data.
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.
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Lens Ctr
Screen Top
B
Screen Ctr
Screen Ctr
B
Screen Bottom
Lens Ctr
Screen Size (4:3)
Diag
inches
30
60
72
84
90
100
120
150
180
200
260
300
C
Throw Distance
C
Throw Distance
B
W H
inches inches inches
24 18 9
48 36 18
57.6 43.2 22
67.2 50.4 25
72 54 27
80 60 30
96 72 36
120 90 45
144 108 54
160 120 60
200 150 78
240 180 90
NEC Solutions (America), Inc.
Visual Systems Division
5"
4.75"
Lens Offset From
Mount Pipe
3.35"
2.38"
C D
wide - tele wide - tele
inches inches degrees
42 - 51 - 12.1 -10.0
86 - 104 - 11.8 - 9.9
104 - 125 - 11.7 - 9.8
121 - 146 - 11.7 - 9.8
130 - 156 - 11.7 - 9.8
145 - 174 - 11.7 - 9.8
174 - 209 - 11.7 - 9.8
218 - 261 - 11.7 - 9.8
262 - 314 - 11.7 - 9.8
291 - 349 - 11.6 - 9.7
379 - 454 - 11.6 - 9.7
438 - 524 - 11.6 - 9.7
LT30/35
Rev 1.0
α
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