Projection Distance And Screen Size For Ceiling Mount; Ceiling Mount Installation; Distance Chart - NEC VT650 Installation Data

VT650 Installation Data
Desktop and Ceiling Mount

Projection Distance and Screen Size for Ceiling Mount

The following shows the proper relative position of the projector and screen. Refer to the table for installation data.
Distances are in inches. For millimeters multiply by 25.4.

Ceiling Mount Installation

Screen Top
D
Lens Ctr
B
Screen Ctr

Distance Chart

Screen Size (4:3)
Diagonal Width(H)
inches inches
25
40
60
67 53.6
72 57.6
84 67.2
90
100
120
150 120
180 144
210 168
240 192
270 216
300 240
Note: For screen sizes not indicated on the projection tables, use the formulas on page 1.
Height (V)
inches
20 15
32 24
48 36
40.2
43.2
50.4
72 54
80 60
96 72
90
108
126
144
162
180
C
Throw Distance
C
B
wide - tele
inches
inches
6.0 NA - 42.4
9.6 57.1 - 68.9
14.4 86.5 - 104.1
16.1 96.8 - 116.5
17.3 104.2 - 125.3
20.2 121.8 - 146.5
21.7 130.6 - 157.1
24.1 145.3 - 174.7
28.9 174.7 - 210.0
36.1 218.8 - 263.0
43.3 263.0 - 315.9
50.5 307.1 - 368.8
57.7 351.2 - 421.8
65.0 395.3 - NA
72.2 439.4 - NA
5.9"
5.5"
α
Lens Offset from
Mount Pipe
1.4"
α
D
wide - tele
degrees
inches
1.5 NA - 8.1
2.4 9.6 - 8.0
3.6 9.5 - 7.9
4.0 9.5 - 7.9
4.3 9.4 - 7.9
5.0 9.4 - 7.9
5.3 9.4 - 7.8
5.9 9.4 - 7.8
7.1 9.4 - 7.8
8.9 9.4 - 7.8
10.7 9.4 - 7.8
12.5 9.3 - 7.8
14.3 9.3 - 7.8
16.0 9.3 - NA
17.8 9.3 - NA
Visual Systems
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