NEC LT280 LT280/LT38 UM - Page 21

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. Screen center Projector bottom α 2.54"/64.5mm Lens center C B D Screen 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) α = Throw angle NOTE: Distances may vary +/-5%. LT380 Screen Size B Diagonal Width Height inch inch inch inch 21 17 13 5 25 20 15 5 30 24 18 6 40 32 24 9 60 48 36 13 72 58 43 16 80 64 48 17 84 67 50 18 90 72 54 19 100 80 60 22 120 96 72 26 150 120 90 32 180 144 108 39 200 160 120 43 210 168 126 45 240 192 144 52 270 216 162 58 300 240 180 65 C Wide - Tele 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 D inch -2 -2 -3 -3 -5 -6 -7 -7 -8 -8 -10 -13 -15 -17 -18 -20 -23 -25 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 Screen Size Diagonal Width inch mm mm 21 533 427 25 635 508 30 762 610 40 1016 813 60 1524 1219 72 1829 1463 80 2032 1626 84 2134 1707 90 2286 1829 100 2540 2032 120 3048 2438 150 3810 3048 180 4572 3658 200 5080 4064 210 5334 4267 240 6096 4877 270 6858 5486 300 7620 6096 Height mm 320 381 457 610 914 1097 1219 1280 1372 1524 1829 2286 2743 3048 3200 3658 4115 4572 B mm 115 137 164 219 329 394 438 460 493 548 657 821 986 1095 1150 1314 1479 1643 C Wide - Tele 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 D mm -45 -54 -64 -86 -129 -154 -171 -180 -193 -214 -257 -322 -386 -429 -450 -514 -579 -643 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 LT280 Screen Size B Diagonal Width Height inch inch inch inch 21 17 13 5 25 20 15 6 30 24 18 7 40 32 24 10 60 48 36 14 72 58 43 17 80 64 48 19 84 67 50 20 90 72 54 21 100 80 60 24 120 96 72 29 150 120 90 36 180 144 108 43 200 160 120 48 210 168 126 50 240 192 144 57 270 216 162 64 300 240 180 72 C Wide - Tele 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 D inch -1 -2 -2 -2 -4 -4 -5 -5 -6 -6 -7 -9 -11 -12 -13 -15 -17 -18 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 Screen Size Diagonal Width inch mm mm 21 533 427 25 635 508 30 762 610 40 1016 813 60 1524 1219 72 1829 1463 80 2032 1626 84 2134 1707 90 2286 1829 100 2540 2032 120 3048 2438 150 3810 3048 180 4572 3658 200 5080 4064 210 5334 4267 240 6096 4877 270 6858 5486 300 7620 6096 11 Height mm 320 381 457 610 914 1097 1219 1280 1372 1524 1829 2286 2743 3048 3200 3658 4115 4572 B mm 127 152 182 243 364 437 485 509 546 606 728 909 1091 1213 1273 1455 1637 1819 C Wide - Tele 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 D mm -33 -39 -47 -62 -93 -112 -125 -131 -140 -156 -187 -234 -280 -311 -327 -374 -420 -467 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