Ceiling Mount - NEC MultiSync LT80 Installation Data

Visual Systems Division
Technical Bulletin
MultiSync LT80 Installation Data
Desk Top and Ceiling Mount
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.
Ceiling Mount System
Screen Top
Screen Center
Distance Chart
Screen Size
Diagonal
40"
60"
67"
72"
84"
90"
100"
120"
150"
180"
210"
240"
270"
300"
Note:
For screen sizes of 24 to 300 inches not indicated on the projection tables, use the formulas on page 1.
A
Width wide - tele
32" 65.2 - 84.4"
48" 97.7" - 126.5"
53.6" 109.8" - 141.5"
57.6" 118.2" - 152.2"
67.2" 138.2" - 178.0"
72" 148.4" - 190.9"
80" 164.7" - 212.8"
96" 198.5" - 255.2"
120" 248.7" - 319.6"
144" 299.0" - 384.0"
168" 349.2" - 448.5"
192" 399.2" - 512.8"
216" 449.4" - 577.3"
240" 500.2" - No Tele
C
A
Horizontal
Offset
B
wide - tele
4.8" 63" - 82.7"
6.9" 94.5" - 124.0"
7.9" 106.2" - 138.7"
8.5" 114.3" - 149.2"
9.9" 133.7" - 174.5"
10.6" 143.5" - 187.1"
11.5" 159.4" - 208.7"
14.1" 192.1" - 250.3"
17.7" 240.7" - 313.4"
21.2" 289.3" - 376.6"
24.8" 337.9" - 439.8"
28.3" 386.5" - 502.9"
31.9" 435.1" - 566.1"
35.1" 484.3" - No Tele
6.23"
Lens
1.25"
C
wide - tele
14.9° - 11.5°
14.8° - 11.4°
14.8° - 11.4°
14.8° - 11.4°
14.7° - 11.4°
14.7° - 11.4°
14.6° - 11.3°
14.6° - 11.3°
14.6° - 11.3°
14.6° - 11.3°
14.6° - 11.3°
14.5° - 11.3°
14.5° - 11.3°
14.5° - No Tele
Page2