NEC Display Solutions of America, Inc.
M271X/M311X Installation Guide
Ceiling Mounted and Desktop Rev 1.0
www.necdisplay.com M271X, M311X Page 2 of 6
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.
Lens Offset From
Mount Pipe
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Bottom
2.22"
C
Throw Distance
Screen Top
4.56"
5.17"
D
B
Lens Ctr
Screen Ctr
D
2.79
Diagonal Width(W) Height (H)
inches inches inches inches
30 24 18 6 31 - 53 11.3 - 6.7
60 48 36 12 64 - 107 11.0 - 6.6
67 54 40.2 14 71 - 120 10.9 - 6.6
72 58 43.2 15 77 - 129 10.9 - 6.6
84 67 50.4 17 90 - 151 10.9 - 6.6
90 72 54 19 97 - 162 10.9 - 6.6
100 80 60 21 108 - 180 10.9 - 6.5
120 96 72 25 129 - 216 10.8 - 6.5
150 120 90 31 162 - 270 10.8 - 6.5
180 144 108 37 195 - 325 10.8 - 6.5
210 168 126 43 228 - 379 10.8 - 6.5
240 192 144 49 261 - 434 10.8 - 6.5
270 216 162 56 293 - 488 10.8 - 6.5
300 240 180 62 326 - 543 10.7 - 6.5
Screen Size (16:10)
-3
inches
B
C
w ide - tele
inches
-28
degrees
D
α
w ide - tele
-6
-6
-7
-8
-8
-9
-11
-14
-17
-20
-22
-25
