Throw Distance And Screen Size - NEC LT280 User Manual

Throw Distance and Screen Size

The following shows the proper relative positions of the projector and screen. Refer to the table to determine the
position of installation.
Projector bottom
Distance Chart
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and screen bottom (top of screen for ceiling application)
= Throw angle
NOTE: Distances may vary +/-5%.
LT380
Screen Size
Diagonal Width Height
inch inch inch
21 17 13
25 20 15
30 24 18
40 32 24
60 48 36
72 58 43
80 64 48
84 67 50
90 72 54
100 80 60
120 96 72
150 120 90
180 144 108
200 160 120
210 168 126
240 192 144
270 216 162
300 240 180
LT280
Screen Size
Diagonal Width Height
inch
inch inch
21 17 13
25 20 15
30 24 18
32
40 24
48
60 36
72 58 43
80 64 48
84 67 50
90 72 54
100 80 60
120 96 72
150 120 90
180 144 108
200 160 120
210 168 126
240 192 144
270 216 162
300 240 180
B C D
Wide – Tele
inch
inch inch
-2
5 – – 28
-2
5 27 – 33 11.2 – 9.2
-3
6 33 – 41 11.1 – 9.0
-3
9 45 – 55 10.8 – 8.9
-5
13 69 – 84 10.6 – 8.7
-6
16 83 – 102 10.5 – 8.7
-7
17 93 – 113 10.5 – 8.7
-7
18 98 – 119 10.5 – 8.7
-8
19 105 – 128 10.5 – 8.6
-8
22 117 – 142 10.4 – 8.6
-10
26 141 – 171 10.4 – 8.6
-13
32 176 – 214 10.4 – 8.6
-15
39 212 – 257 10.4 – 8.6
-17
43 236 – 286 10.3 – 8.6
-18
45 248 – 301 10.3 – 8.6
-20
52 284 – 344 10.3 – 8.6
-23
58 320 – 387 10.3 – 8.5
-25
65 356 – 431 10.3 – 8.5
B C D
Wide – Tele
inch
inch inch
-1
5 – – 28
6 28 – 34 -2
12.1 – 10.0
-2
7 34 – 41
11.9 –
-2
10 46 – 56
11.8 –
14 69 – 84 -4
11.7 –
-4
17 83 – 102 11.6 –
-5
19 93 – 113 11.6 –
20 98 – 119 -5
11.6 –
-6
21 105 – 127
11.6 –
-6
24 117 – 141 11.6 –
-7
29 141 – 170 11.5 –
-9
36 176 – 213 11.5 –
-11
43 211 – 256 11.5 –
48 235 – 285 -12
11.5 –
-13
50 247 – 299 11.5 –
-15
57 283 – 342 11.5 –
-17
64 318 – 385 11.5 –
-18
72 354 – 428 11.5 –
Screen center
2.54"/64.5mm
Lens center
C
Screen Size
Wide – Tele Diagonal
degree inch mm
– – 9.2 21 533
25 635
30 762
40 1016
60 1524
72 1829
80 2032
84 2134
90 2286
100 2540
120 3048
150 3810
180 4572
200 5080
210 5334
240 6096
270 6858
300 7620
Screen Size
Wide – Tele Diagonal
degree inch mm
– – 10.0 21 533
25 635
9.8 30 762
9.8 40 1016
9.6 60 1524
9.6 72 1829
9.6 80 2032
9.6 84 2134
9.6 90 2286
9.6 100 2540
9.6 120 3048
9.5 150 3810
9.5 180 4572
9.5 200 5080
9.5 210 5334
9.5 240 6096
9.5 270 6858
9.5 300 7620
11
2. Installation and Connections
B
D
Screen bottom
B
Width Height Wide – Tele
mm mm mm
427 320 115 – –
508 381 137 690 –
610 457 164 840 – 1040
813 610 219 1150 – 1400
1219 914 329 1750 – 2140
1463 1097 394 2120 – 2580
1626 1219 438 2360 – 2870
1707 1280 460 2480 – 3020
1829 1372 493 2660 – 3240
2032 1524 548 2970 – 3600
2438 1829 657 3570 – 4340
3048 2286 821 4480 – 5440
3658 2743 986 5390 – 6540
4064 3048 1095 6000 – 7270
4267 3200 1150 6300 – 7640
4877 3658 1314 7210 – 8740
5486 4115 1479 8120 – 9840
6096 4572 1643 9030 – 10940
B
Width Height Wide – Tele
mm mm mm
427 320 127 – –
508 381 152 710 –
610 457 182 860 – 1050
813 610 243 1160 – 1410
1219 914 364 1760 – 2140
1463 1097 437 2120 – 2580
1626 1219 485 2360 – 2870
1707 1280 509 2480 – 3010
1829 1372 546 2660 – 3230
2032 1524 606 2960 – 3590
2438 1829 728 3570 – 4320
3048 2286 909 4470 – 5410
3658 2743 1091 5370 – 6510
4064 3048 1213 5970 – 7230
4267 3200 1273 6270 – 7600
4877 3658 1455 7180 – 8690
5486 4115 1637 8080 – 9780
6096 4572 1819 8980 – 10870
C D
Wide – Tele
mm
mm
degree
-45
710 – – 9.2
-54
850 11.2 – 9.2
-64
11.1 – 9.0
-86
10.8 – 8.9
-129
10.6 – 8.7
-154
10.5 – 8.7
-171
10.5 – 8.7
-180
10.5 – 8.7
-193
10.5 – 8.6
-214
10.4 – 8.6
-257
10.4 – 8.6
-322
10.4 – 8.6
-386
10.4 – 8.6
-429
10.3 – 8.6
-450
10.3 – 8.6
-514
10.3 – 8.6
-579
10.3 – 8.5
-643
10.3 – 8.5
C D
Wide – Tele
mm
mm degree
-33
720 – – 10.0
-39
860 12.1 – 10.0
-47
11.9 – 9.8
-62
11.8 – 9.8
-93
11.7 – 9.6
-112
11.6 – 9.6
-125
11.6 – 9.6
-131
11.6 – 9.6
-140
11.6 – 9.6
-156
11.6 – 9.6
-187
11.5 – 9.6
-234
11.5 – 9.5
-280
11.5 – 9.5
-311
11.5 – 9.5
-327
11.5 – 9.5
-374
11.5 – 9.5
-420
11.5 – 9.5
-467
11.5 – 9.5