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Adjusting the Projection Distance
AN-W6EZ
Throw distance ratio
1:1.3 to 1.7
NORMAL Mode (4:3)
The formula for screen size and projection distance
WIDE Mode (16:9)
The formula for screen size and projection distance
• There is an error of
• Values with a minus ( ) sign indicate the distance of the lens centre below the bottom of the screen.
25
Screen size (4:3) (X)
Diag.
Width
762 cm
(300 )
610 cm
(240 )
457 cm
508 cm
(200 )
406 cm
(160 )
305 cm
381 cm
(150 )
305 cm
(120 )
229 cm
254 cm
(100 )
203 cm
(80 )
152 cm
213 cm
(84 )
170 cm
(67 )
127 cm
183 cm
(72 )
147 cm
(58 )
109 cm
152 cm
(60 )
122 cm
(48 )
102 cm
(40 )
81 cm
(32 )
l
(Max.) = 0.0347x
0.0709
1
(Min.) = 0.0267x
0.0715
l
2
h
(Upper) = 0.3x
2.54
1
h
(Lower) = 0
2
Screen size (4:3) (X)
Diag.
Width
762 cm
(300 )
663 cm
(261 )
373 cm
508 cm
(200 )
442 cm
(174 )
249 cm
381 cm
(150 )
333 cm
(131 )
188 cm
338 cm
(133 )
295 cm
(116 )
165 cm
269 cm
(106 )
234 cm
(92 )
132 cm
254 cm
(100 )
221 cm
(87 )
124 cm
234 cm
(92 )
203 cm
(80 )
114 cm
213 cm
(84 )
185 cm
(73 )
104 cm
183 cm
(72 )
160 cm
(63 )
152 cm
(60 )
132 cm
(52 )
102 cm
(40 )
89 cm
(35 )
(Max.) = 0.0378x
0.0726
l
1
l
(Min.) = 0.0291x
0.0731
2
(Upper) = 0.2451x
2.54
h
1
h
(Lower) = 0.0817x
2.54
2
3% in the formula above.
Projection distance (L)
Height
Maximum (l
)
Minimum (l
)
1
2
(180 )
10.3 m
7.9 m
(120 )
6.9 m
5.3 m
(90 )
5.1 m
3.9 m
(60 )
3.4 m
2.6 m
(50 )
2.8 m
2.2 m
(43 )
2.4 m
1.9 m
91 cm
(36 )
2.0 m
1.5 m
61 cm
(24 )
1.3 m
1.0 m
x: Screen size (diag.) (X) (inches)
l: Projection distance (L) (m)
h: Lens centre to the lower edge of the screen (H) (cm)
Projection distance (L)
Height
Maximum (l
)
Minimum (l
)
1
2
(147 )
11.3 m
8.7 m
(98 )
7.5 m
5.8 m
(74 )
5.6 m
4.3 m
(65 )
5.0 m
3.8 m
(52 )
3.9 m
3.0 m
(49 )
3.7 m
2.8 m
(45 )
3.4 m
2.6 m
(41 )
3.1 m
2.4 m
89 cm
(35 )
2.7 m
2.0 m
74 cm
(29 )
2.2 m
1.7 m
51 cm
(20 )
1.4 m
1.1 m
x: Screen size (diag.) (X) (inches)
l: Projection distance (L) (m)
h: Lens centre to the lower edge of the screen (H) (cm)
Lens centre to the lower edge of the screen (H)
Upper lens shift position (h
)
Lower lens shift position (h
1
228.6 cm
0.0 cm
152.4 cm
0.0 cm
114.3 cm
0.0 cm
76.2 cm
0.0 cm
64.0 cm
0.0 cm
54.9 cm
0.0 cm
45.7 cm
0.0 cm
30.5 cm
0.0 cm
Lens centre to the lower edge of the screen (H)
Upper lens shift position (h
)
Lower lens shift position (h
1
186.8 cm
62.3 cm
124.5 cm
41.5 cm
93.4 cm
31.1 cm
82.8 cm
27.6 cm
66.0 cm
22.0 cm
62.3 cm
20.8 cm
57.3 cm
19.1 cm
52.3 cm
17.4 cm
44.8 cm
14.9 cm
37.4 cm
12.5 cm
24.9 cm
8.3 cm
)
2
)
2
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