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Adjusting the Projection Distance
Standard Lens
Throw distance ratio
1:1.8 to 2.4
NORMAL Mode (4:3)
762 cm
508 cm
381 cm
254 cm
213 cm
183 cm
152 cm
102 cm
The formula for screen size and projection distance
l
1
l
2
h
h
WIDE Mode (16:9)
762 cm
508 cm
381 cm
338 cm
269 cm
254 cm
234 cm
213 cm
183 cm
152 cm
102 cm
The formula for screen size and projection distance
l
1
l
2
h
h
• There is an error of
• Values with a minus ( ) sign indicate the distance of the lens centre below the bottom of the screen.
Screen size (4:3) (X)
Diag.
Width
(300 )
610 cm
(240 )
457 cm
(200 )
406 cm
(160 )
305 cm
(150 )
305 cm
(120 )
229 cm
(100 )
203 cm
(80 )
152 cm
(84 )
170 cm
(67 )
127 cm
(72 )
147 cm
(58 )
109 cm
(60 )
122 cm
(48 )
91 cm
(40 )
81 cm
(32 )
61 cm
(Max.) = 0.0482x
0.0226
(Min.) = 0.037x
0.041
(Upper) = 0.3x
2.54
1
(Lower) = 0
2
Screen size (4:3) (X)
Diag.
Width
(300 )
663 cm
(261 )
373 cm
(200 )
442 cm
(174 )
249 cm
(150 )
333 cm
(131 )
188 cm
(133 )
295 cm
(116 )
165 cm
(106 )
234 cm
(92 )
132 cm
(100 )
221 cm
(87 )
124 cm
(92 )
203 cm
(80 )
114 cm
(84 )
185 cm
(73 )
104 cm
(72 )
160 cm
(63 )
89 cm
(60 )
132 cm
(52 )
74 cm
(40 )
89 cm
(35 )
51 cm
(Max.) = 0.0525x
0.0546
(Min.) = 0.0404x
0.0397
(Upper) = 0.2451x
2.54
1
(Lower) = 0.0817x
2.54
2
3% in the formula above.
Projection distance (L)
Height
Maximum (l
)
Minimum (l
)
1
2
(180 )
14.3 m
11.0 m
(120 )
9.8 m
7.4 m
(90 )
7.2 m
5.6 m
(60 )
4.9 m
3.7 m
(50 )
4.0 m
3.1 m
(43 )
3.4 m
2.6 m
(36 )
2.9 m
2.2 m
(24 )
1.9 m
1.4 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 )
15.6 m
12.0 m
(98 )
10.5 m
8.1 m
(74 )
7.9 m
6.1 m
(65 )
7.0 m
5.4 m
(52 )
5.6 m
4.3 m
(49 )
5.2 m
4.0 m
(45 )
4.8 m
3.7 m
(41 )
4.3 m
3.3 m
(35 )
3.7 m
2.8 m
(29 )
3.1 m
2.4 m
(20 )
2.0 m
1.5 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
24
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