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Adjusting the Projection Distance
AN-P48EZ
Throw distance ratio
1:4.6 to 6.1
NORMAL Mode (4:3)
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
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.
(Max.) = 0.1214x
0.1272
(Min.) = 0.0927x
0.1233
(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
(Max.) = 0.1323x
0.1272
(Min.) = 0.101x
0.1233
(Upper) = 0.2451x
2.54
1
(Lower) = 0.0817x
2.54
2
3% in the formula above.
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 )
39.8 m
30.4 m
(98 )
26.6 m
20.3 m
(74 )
20.0 m
15.3 m
(65 )
17.7 m
13.6 m
(52 )
14.1 m
10.8 m
(49 )
13.4 m
10.2 m
(45 )
12.3 m
9.4 m
(41 )
11.2 m
8.6 m
(35 )
9.7 m
7.4 m
(29 )
8.1 m
6.2 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
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
)
2
28
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