Projection Distance And Screen Size For Ceiling Mount; Ceiling Mount Installation; Distance Chart - NEC LCDMT850 Installation Data
With optional mt13zl zoom lens (1.3 – 1.6:1)
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Also See for LCDMT850:
- User manual (60 pages) ,
- Installation data (7 pages) ,
- Installation data (8 pages)
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Visual Systems Division
Technical Bulletin
MT850 Installation Data
with Optional MT13ZL Zoom Lens (1.3 – 1.6:1)
Projection Distance and Screen Size for Ceiling Mount
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 Mount Installation
Screen Top
D
Lens Ctr
B
Screen Ctr
Scrn Bottom
Distance Chart
Screen Size
Diagonal
40"
60"
67"
72"
84"
90"
100"
120"
150"
180"
Note:
For screen sizes of 40 to 200 inches not indicated on the projection tables, use the formulas on page 1.
C
Throw Distance
Width
Height
32"
24"
48"
36"
53.6"
40.2"
57.6"
43.2"
67.2"
50.4"
72"
54"
80"
60"
96"
72"
120"
90"
144"
108"
5.8"
B
C
wide - tele
10.3"
39.6" - 49.2"
15.4"
60.6" - 75.0"
17.2"
67.9" - 84.0"
18.5"
73.1" - 90.5"
21.6"
85.7" - 106.0"
23.2"
92.0" - 113.7"
25.7"
102.5" - 126.6"
30.9"
123.4" - 152.4"
38.6"
154.9" - 191.0"
46.3"
186.3" - 229.7"
Rev. 1.6
9.3"
Lens Offset from
Mounting Pipe
1.7"
D
wide - tele
1.7"
14.6° - 11.8°
2.6"
14.3° - 11.6°
2.9"
14.3° - 11.6°
3.1"
14.2° - 11.6°
3.6"
14.2° - 11.5°
3.8"
14.1° - 11.5°
4.3"
14.1° - 11.5°
5.1"
14.1° - 11.5°
6.4"
14.0° - 11.4°
7.7"
14.0° - 11.4°
Page 2
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