NEC LT380 - Manual (Page 21)

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