S
P
E
C
F
I
L
E
PT-
LB51
Micro-Portable Wireless LCD Projector
As of May 2007
< 5 >
Standard setting-up positions
L
ø49
(1-15/16˝)
ø43
(1-11/16˝)
93.5 (3-11/16˝)
70 (2-3/4˝)
Projected image
Upper edge of projected image
Lower edge of projected image
Projected image
L
L
328–
408
(12-29/32˝–16-1/16˝)
Adju
s
table in 20-mm
(15/32-inch)
s
tep.
67.5 (2-21/32˝)
65
(2-9/16˝)
E
E
unit : mm (inch)
NOTE:
Illustrations show the projector installed
using optional ceiling bracket.
This illustration is not drawn to scale.
L: Distance to screen
E: Height from the edge of screen to
center of lens
* This distance is especially recommend-
ed for ceiling-mounted use and other
permanent installations.
NOTE:
Values shown are approximate.
The value for L (distance to screen)
varies slightly depending on the zoom
lens characteristics.
When the shortest projection distance is
used, a small amount of distortion may
occur in the image due to the zoom lens
characteristics.
0.84 m
1.02 m
1.27 m
1.52 m
1.78 m
2.03 m
2.29 m
2.54 m
3.05 m
3.81 m
5.08 m
6.35 m
7.62 m
–
1.2 m
1.6 m
1.9 m
2.2 m
2.5 m
2.8 m
3.1 m
3.7 m
4.6 m
6.2 m
7.7 m
9.2 m
1.1 m
1.4 m
1.8 m
2.1 m
2.5 m
2.9 m
3.3 m
3.6 m
4.4 m
5.5 m
7.3 m
9.2 m
11.1 m
0.07 m
0.09 m
0.11 m
0.13 m
0.15 m
0.17 m
0.19 m
0.21 m
0.25 m
0.32 m
0.42 m
0.53 m
0.64 m
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
33˝
40˝
50˝
60˝
70˝
80˝
90˝
100˝
120˝
150˝
200˝
250˝
300˝
–
4.0´
5.0´
6.0´
7.0´
8.0´
9.0´
10.0´
12.0´
15.1´
20.1´
25.1´
30.2´
3.9´
4.7´
5.9´
7.2´
8.4´
9.6´
10.8´
12.0´
14.5´
18.1´
24.2´
30.3´
36.4´
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0 –
0.2´
0.3´
0.4´
0.4´
0.5´
0.6´
0.6´
0.7´
0.9´
1.1´
1.4´
1.8´
2.1´
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Projection size
(diagonal)
Height from the edge of screen
to center of lens (H)
Projection distance (L)
Min (wide)
Max (telephoto)
Calculation of the projection distance
For a screen size different from the above, use the equation below to calculate the projection distance.
Aspect ratio 4 : 3
minimum
L (m) = (diagonal screen size in inches) x 0.0307 - 0.0310
maximum
L (m) = (diagonal screen size in inches) x 0.0371 - 0.0290
Aspect ratio 16 : 9
minimum
L (m) = (diagonal screen size in inches) x 0.0335 - 0.0315
maximum
L (m) = (diagonal screen size in inches) x 0.0405 - 0.0365
