NEC MT1065 - Ceiling Mounted

4:3 Screens
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
Throw Distance
Screen Top
B
α
Lens Offset from
Mount Pipe
Screen Ctr
C
* lens set back inside shroud 0.4" from front of cabinet
/ Lens Ctr*
4.4"
2.9"
4.4"
Desktop
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C
Throw Distance
B
Screen Ctr
3.1"
α
* lens set back inside shroud 0.4" from front of cabinet
Screen Bottom
/ Lens Ctr*
Note: To avoid premature lamp failure, do not tilt the front of the projector up or down by more than 75° from level. Tilting the front of the
projector up or down from 15° to 75° might reduce lamp life by up to 25%.
Distance chart for popular 4:3 screens
B
Diag W H wide
-
tele wide
-
tele
inches inches inches inches
40 32 24 12.0 82.0
-
131.8 8.3
-
5.2
60 48 36 18.0 125.6
-
200.4 8.2
-
5.1
72 57.6 43.2 21.6 151.8
-
241.5 8.1
-
5.1
84 67.2 50.4 25.2 177.9
-
282.7 8.1
-
5.1
90 72 54 27.0 191.0
-
303.3 8.0
-
5.1
100 80 60 30.0 212.8
-
337.6 8.0
-
5.1
120 96 72 36.0 256.5
-
406.1 8.0
-
5.1
150 120 90 45.0 321.9
-
509.0 8.0
-
5.1
180 144 108 54.0 387.3
-
611.9 7.9
-
5.0
200 160 120 60.0 430.9
-
680.5 7.9
-
5.0
250 200 150 75.0 540.0
-
851.9 7.9
-
5.0
300 240 180 90.0 649.1
-
1023.4 7.9
-
5.0
350 280 210 105.0 758.1
-
NA 7.9
-
NA
400 320 240 120.0 867.2
-
NA 7.9
-
NA
450 360 270 135.0 976.2
-
NA 7.9
-
NA
500 400 300 150.0 1085.3
-
NA 7.9
-
NA
Screen Size (4:3) C
inches
α
degrees
Note: For screen sizes not indicated on the chart,
use the formulas on page 1.
Note: “NA” means it is outside the lens range for
that part of the zoom. Refer to “Screen Sizes” in
Lens Specifications on Page 1.