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 2 of 14
Formulas: 4:3 Aspect Ratio (PA621X—XGA)
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:
4:3 Screen Formulas:
NP11FL:
C
= 0.827W – 1.374
W = Image Width
W = H x 4/3
NP12ZL:
C
(Wide) = 1.214W – 1.794 ------
C
(Tele) = 1.578W – 1.794
H = Image Height (size)
H = W x 3/4
NP13ZL:
C
(Wide) = 1.525W – 1.974 ------
C
(Tele) = 3.043W – 1.972
C = Throw distance
Diagonal = W x 5/4
NP14ZL:
C
(Wide) = 3.034W – 4.844 ------
C
(Tele) = 4.855W – 4.844
NP15ZL:
C
(Wide) = 4.797W – 7.630 ------
C
(Tele) = 7.291W – 7.660
NP30ZL:
C
(Wide) = 0.827W – 1.587 ------
C
(Tele) = 1.078W – 1.587
Note:
Tilting the front of the projector up or down by more than 45° from level could reduce lamp life by up to 20%.
Distance Chart for popular 4:3 screens
Rear Lens
NP11FL
Diagonal Width(W) Height (H)
0.8:1
inches
inches
inches
inches
40
32
24
25.09
24.9 - 32.9
37.1 - 48.7
46.8
95.4
92.2
150.5
145.9
225.7
60
48
36
25.09
38.1 - 50.2
56.5 - 74.0
71.2 - 144.1
140.8
228.2
222.6
342.3
67
54
40
25.09
42.7 - 56.2
63.3 - 82.8
79.8 - 161.1
157.8
255.4
249.5
383.1
72
58
43
25.09
46.0 - 60.5
68.1 - 89.1
85.9 - 173.3
169.9
274.8
268.7
412.3
84
67
50
25.09
54.0 - 70.9
79.8 - 104.2
100.5 - 202.5
199.0 - 321.4
314.7 - 482.3
90
72
54
25.09
58.0 - 76.0
85.6 - 111.8
107.8 - 217.1
213.6 - 344.7
337.8 - 517.3
100
80
60
25.09
64.6 - 84.7
95.3 - 124.4
120.0 - 241.5
237.9 - 383.6
376.1 - 575.6
120
96
72
25.09
77.8 - 101.9 114.8 - 149.7
144.4 - 290.2
286.4 - 461.2
452.9 - 692.3
150
120
90
NA
97.7 - 127.8 143.9 - 187.6
181.0 - 363.2
359.2 - 577.8
568.0 - 867.3
180
144
108
NA
117.5 - 153.6 173.0 - 225.4
217.6 - 436.2
432.1 - 694.3
683.1 - 1042.2
210
168
126
NA
137.3 - 179.5 202.2 - 263.3
254.2 - 509.3
504.9 - 810.8
798.3 - 1217.2
240
192
144
NA
157.2 - 205.4 231.3 - 301.2
290.8 - 582.3
577.7 - 927.3
913.4 - 1392.2
270
216
162
NA
177.0 - 231.3 260.4 - 339.1
327.4 - 655.3
650.5 - 1043.8 1028.5 - 1567.2
300
240
180
NA
196.9 - 257.1 289.6 - 376.9
364.0 - 728.3
723.3 - 1160.4 1143.7 - 1742.2
400
320
240
NA
263.1 - 343.4 386.7 - 503.2
486.0 - 971.8
966.0 - 1548.8 1527.4 - 2325.5
500
400
300
NA
329.2 - 429.6 483.8 - 629.4
608.0
1215.2 1208.8 - 1937.2 1911.2 - 2908.7
Screen Size (4:3)
2.97 -4.79:1
NP30ZL
NP12ZL
NP13ZL
NP14ZL
1.50 - 3.02:1
NP15ZL
4.70 - 7.20:1
inches
Zoom Lenses
inches
inches
0.79 - 1.04:1
1.19 - 1.56:1
inches
inches
