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Nec VT45 Manual

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E–17
Screen (inch)
Distance Chart
NOTE: Distances may vary +/–5%.
Lens Offset 5.4mm
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and bottom of screen for desktop
α = Throw angle
Screen Size (Diagonal)
Throw Distance
C
B
44.6 mm / 1.76”
α
D
Projector feet
Screen Center
Lens Center/
Screen Bottom
inch mm inch mm inch mm inch mm inch mm - inch mm inch mm degree - degree
25 635 20 508 15 381 8 191 36 910 - 39 1000 0 0 11.8 - 10.8
30 762 24 610 18 457 9 229 43 1100 - 48 1210 0 0 11.7 - 10.7
40 1016 32 813 24 610 12 305 58 1470 - 64 1620 0 0 11.7 - 10.7
60 1524 48 1219 36 914 18 457 87 2220 - 96 2450 0 0 11.6 - 10.6
67 1702 54 1361 40 1021 20 511 98 2490 - 108 2740 0 0 11.6 - 10.6
72 1829 58 1463 43 1097 22 549 105 2670 - 116 2940 0 0 11.6 - 10.6
80 2032 64 1626 48 1219 24 610 117 2970 - 129 3270 0 0 11.6 - 10.6
84 2134 67 1707 50 1280 25 640 123 3120 - 135 3440 0 0 11.6 - 10.5
90 2286 72 1829 54 1372 27 686 132 3350 - 145 3690 0 0 11.6 - 10.5
100 2540 80 2032 60 1524 30 762 147 3730 - 161 4100 0 0 11.5 - 10.5
120 3048 96 2438 72 1829 36 914 176 4480 - 194 4930 0 0 11.5 - 10.5
150 3810 120 3048 90 2286 45 1143 220 5600 - 243 6170 0 0 11.5 - 10.5
180 4572 144 3658 108 2743 54 1372 265 6730 - 292 7410 0 0 11.5 - 10.5
200 5080 160 4064 120 3048 60 1524 294 7480 - 324 8240 0 0 11.5 - 10.5
210 5334 168 4267 126 3200 63 1600 309 7860 - 341 8650 0 0 11.5 - 10.5
240 6096 192 4877 144 3658 72 1829 354 8980 - 389 9890 0 0 11.5 - 10.5
261 6629 209 5304 157 3978 78 1989 385 9770 - 424 10760 0 0 11.5 - 10.5
270 6858 216 5486 162 4115 81 2057 398 10110 - 438 11130 0 0 11.5 - 10.5
300 7620 240 6096 180 4572 90 2286 443 11240 - 487 12370 0 0 11.5 - 10.5
Screen Size
Diagonal Width Height
B
C
wide tele
D
α
wide tele
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and bottom of screen for desktop
α = Throw angle
Height
Width
40"
25"
60"
80"
100"
120"
150"
200"
250"
300"
61
(24")
38
(15")
91
122
(36") (48")
152
(60")
183
(72")
229
(90")
305
(120")
381
(150")
457
(180")
In this example the projector is upside down with the lens shift maximum position.
Screen
Unit : cm (inch)
When the projector is positioned upside down in a place such as a tall cabinet or
shelf, follow the below.
• Place the projector on a flat and level surface.
• To avoid accidental button operation, stick the supplied three non-slip rubber
pads on three locations on the projector top cabinet as shown in the drawing.
They are a peel-and –sticker pad. Before use, peel the paper off the back of the
rubber pad.
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ON
STAND BY
PC
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RGB OUT
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Non-slip rubber pads
… 25 …


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