Standard Setting-Up Positions; Calculation Of The Projection Distance - Panasonic PT-LB51NT Specifications

S F
P E C I L
Micro-Portable Wireless LCD Projector

Standard setting-up positions

Upper edge of projected image
Projected image
Lower edge of projected image
Projected image
Projection size Projection distance (L)
(diagonal) Min (wide)
0.84 m / 33˝ – /
1.02 m / 40˝ 1.2 m /
1.27 m / 50˝ 1.6 m /
1.52 m / 60˝ 1.9 m /
1.78 m / 70˝ 2.2 m /
2.03 m / 80˝ 2.5 m /
2.29 m / 90˝ 2.8 m /
2.54 m / 100˝ 3.1 m / 10.0´
3.05 m / 120˝ 3.7 m / 12.0´
3.81 m / 150˝ 4.6 m / 15.1´
5.08 m / 200˝ 6.2 m / 20.1´
6.35 m / 250˝ 7.7 m / 25.1´
7.62 m / 300˝ 9.2 m / 30.2´

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
maximum
Aspect ratio 16 : 9
minimum
maximum
As of May 2007
E
L
93.5 (3-11/16˝)
L
70 (2-3/4˝)
L
Height from the edge of screen
Max (telephoto)
– 1.1 m / 3.9´
4.0´ 1.4 m / 4.7´
5.0´ 1.8 m / 5.9´
6.0´ 2.1 m / 7.2´
7.0´ 2.5 m / 8.4´
8.0´ 2.9 m / 9.6´
9.0´ 3.3 m / 10.8´
3.6 m / 12.0´
4.4 m / 14.5´
5.5 m / 18.1´
7.3 m / 24.2´
9.2 m / 30.3´
11.1 m / 36.4´
L (m) = (diagonal screen size in inches) x 0.0307 - 0.0310
L (m) = (diagonal screen size in inches) x 0.0371 - 0.0290
L (m) = (diagonal screen size in inches) x 0.0335 - 0.0315
L (m) = (diagonal screen size in inches) x 0.0405 - 0.0365
ø49
(1-15/16˝)
ø43
(1-11/16˝)
to center of lens (H)
0 – 0.07 m / 0 – 0.2´
0 – 0.09 m / 0 – 0.3´
0 – 0.11 m / 0 – 0.4´
0 – 0.13 m / 0 – 0.4´
0 – 0.15 m / 0 – 0.5´
0 – 0.17 m / 0 – 0.6´
0 – 0.19 m / 0 – 0.6´
0 – 0.21 m / 0 – 0.7´
0 – 0.25 m / 0 – 0.9´
0 – 0.32 m / 0 – 1.1´
0 – 0.42 m / 0 – 1.4´
0 – 0.53 m / 0 – 1.8´
0 – 0.64 m / 0 – 2.1´
PT-LB51NT
unit : mm (inch)
L: Distance to screen
E: Height from the edge of screen to
center of lens
NOTE:
Illustrations show the projector installed
using optional ceiling bracket.
This illustration is not drawn to scale.
* 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.
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