NEC Display Solutions of America, Inc.
NP3151W Installation Guide Desktop and Ceiling Mount v 1.0
www.necdisplay.com NP3151W Page 3 of 11
Formulas
The Projection Formulas use the image width for calculation. Image height is the same for all aspect ratios, only horizontal image
size varies when using a 16:10 aspect ratio screen. For proper projector placement, determine the image width for a desired screen
size. Use the Screen Formulas below to calculate all screen dimensions. Plug in the image width “W” for a 16:10 aspect ratio image
in the Projection Formulas.
Refer to the diagrams (page 5) and charts below for popular screen sizes 16:9 screens:
Projection Formulas: Definitions:
NP01FL: C = 0.7426W – 1.33 W = Image Width
NP02ZL: C(Wide) = 1.0885W – 1.798 ------ C(Tele) = 1.4225W – 1.795 H = Image Height (size)
Standard: C(Wide) = 1.3743W – 2.022 ------ C(Tele) = 1.8319W – 2.015 C = Throw distance
NP03ZL: C(Wide) = 1.7992W – 2.830 ------ C(Tele) = 2.8325W – 2.840
NP04ZL: C(Wide) = 2.7275W – 4.830 ------ C(Tele) = 4.3620W – 4.850 16:9 Screen Formulas:
NP05ZL: C(Wide) = 4.3259W – 7.625 ------ C(Tele) = 6.5228W – 7.645 W = H x 16/9
H = W x 9/16
Screen Diagonal = W x 18.358/16
Note: Tilting the front of the projector or down by more than 45° from level could reduce lamp life by up to 20%.
Distance Chart for popular 16:10 images on a 16:9 screen
Note: For screen sizes not indicated on the projection tables, use the formulas on page above.
Rear Lens
NP01FL
Diagonal Width(H)Height (V) Diagonal Width(W) Height (H) 0.8:1
inches inches inches inches inches inches inches
92 80 45 85 72 45 58 108 - 145 85 - 112 141 - 224 213 - 344 337 - 516
100 87 49 92 78 49 63 118 - 158 93 - 122 153 - 244 233 - 375 368 - 563
106 92 52 98 83 52 67 126 - 168 99 - 129 163 - 259 247 - 398 391 - 598
110 96 54 102 86 54 70 130 - 174 103 - 134 169 - 269 257 - 414 406 - 621
119 104 59 111 94 59 76 142 - 190 112 - 147 184 - 293 280 - 451 443 - 677
123 107 60 113 96 60 78 145 - 194 115 - 150 188 - 299 286 - 460 452 - 691
133 116 65 123 104 65 85 157- 210 124 - 162 204 - 324 310 - 499 490 - 749
135 118 66 125 106 66 86 160- 213 126 - 165 207 - 329 315 - 507 498 - 761
159 139 78 147 125 78 NA 189 - 252 149 - 195 246 - 390 373 - 600 590 - 901
161 140 79 149 126 79 NA 192 - 256 151 - 198 249 - 395 378 - 608 598 - 912
229 200 113 213 181 113 NA 275 - 367 217 - 283 357 - 566 543 - 871 858 - 1308
275 240 135 255 216 135 NA 329 - 438 260 - 339 427 - 677 650 - 1042 1027 - 1564
367 320 180 340 288 180 NA 439 - 585 347 - 452 571 - 903 868 - 1391 1372 - 2088
459 400 225 425 360 225 NA 550 - 732 435 - 566 714 - 1130 1086 - 1740 1716 - 2612
490 427 240 453 384 240 NA 587 - 781 464 - 604 762 - 1205 1159 - 1856 1831 - 2787
Zoom Lenses
Image Size (16:10)
on a (16:9) screen
Screen Size (16:9)
2.98 - 4.77:1
Standard NP02ZL NP03ZL NP04ZL
1.94 - 3.07:11.5 - 2.0:1 1.18 - 1.54:1
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NP05ZL
4.62 - 7.02:1
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