NEC Display Solutions of America, Inc.
PA521U/PA571W/PA621X Installation Guide
Desktop and Ceiling Mount Rev 1.0
www.necdisplay.com PA521U/ PA571W/PA621X Page 3 of 14
Formulas: 16:10 Aspect Ratio (PA571W—WXGA)
The Projection Formulas use the image width for calculation. Image width is the same for all aspect ratios, only vertical image size
varies. 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 for “W” in the Projection Formulas.
Refer to the diagrams and charts for popular screen sizes on page 2 and 3:
Projection Formulas: Definitions: 16:10 Screen Formulas:
NP11FL: C = 0.812W – 1.346 W = Image Width W = H x 16/10
NP12ZL: C(Wide) = 1.193W – 1.795 ------ C(Tele) = 1.551W – 1.795 H = Image Height (size) H = W x 10/16
NP13ZL: C(Wide) = 1.495W – 1.972 ------ C(Tele) = 2.985W – 1.972 C = Throw distance Screen Diagonal = W x 18.868/16
NP14ZL: C(Wide) = 2.976W – 4.843 ------ C(Tele) = 4.763W – 4.843
NP15ZL: C(Wide) = 4.708W – 7.630 ------ C(Tele) = 7.154W – 7.630
NP30ZL: C(Wide) = 0.808W – 1.587 ------ C(Tele) = 1.054W – 1.587
Distance Chart for popular 16:10 Screens (WXGA)
inches inches inches inches
40 34 21 26.3 25.9 - 34.3 38.8 - 50.9 48.9 99.5 96.3 157.1 152.4 235.6
60 51 32 40.1 39.7 - 52.2 59.0 - 77.3 74.3 - 150.3 146.9 238.1 232.5 357.2
67 57 36 44.9 44.5 - 58.5 66.2 - 86.6 83.2 - 168.2 164.8 266.6 260.7 400.1
72 61 38 48.2 47.8 - 62.8 71.0 - 92.8 89.2 - 180.1 176.7 285.7 279.6 428.8
84 71 45 56.3 55.8 - 73.3 82.9 - 108.3 104.2 - 210.0 206.5 - 333.3 326.6 - 500.3
90 76 48 60.4 59.9 - 78.6 88.9 - 116.1 111.6 - 224.9 221.3 - 357.1 350.2 - 536.1
100 85 53 67.7 67.1 - 88.1 99.6 - 130.0 125.1 - 251.8 248.1 - 400.0 392.6 - 600.5
120 102 64 81.5 80.9 - 106.0 119.9 - 156.4 150.5 - 302.5 298.7 - 481.0 472.6 - 722.1
150 127 79 NA 101.1 - 132.3 149.7 - 195.2 187.9 - 377.1 373.1 - 600.1 590.3 - 900.9
180 153 95 NA 122.1 - 159.7 180.7 - 235.5 226.8 - 454.7 450.5 - 723.9 712.7 - 1086.9
210 178 111 NA 142.3 - 186.1 210.6 - 274.3 264.1 - 529.4 524.9 - 843.0 830.4 - 1265.8
240 204 127 NA 163.3 - 213.5 241.6 - 314.6 303.0 - 607.0 602.3 - 966.8 952.8 - 1451.8
270 229 143 NA 183.5 - 239.8 271.4 - 353.4 340.4 - 681.6 676.7 - 1085.9 1070.5 - 1630.6
300 254 159 NA 203.7 - 266.2 301.2 - 392.2 377.8 - 756.2 751.1 - 1205.0 1188.2 - 1809.5
400 339 212 NA 272.4 - 355.8 402.6 - 524.0 504.8 - 1009.9 1004.0 - 1609.8 1588.4 - 2417.6
500 424 265 NA 341.1 - 445.4 504.0 - 655.8 631.9 1263.7 1257.0 - 2014.7 1988.6 - 3025.7
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