Setting up, Screen size and throw distance, Nglish - 15 – Panasonic PT-LB75U User Manual
Page 15: Jcalculation methods for screen dimensions, Getting started
Getting Started
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NGLISH - 15
Setting up
You can adjust the projection size with 1.2x zoom lens. Calculate and define the throw distance as follows.
* All measurements above are approximate and may differ slightly from the actual measurements.
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Calculation methods for screen dimensions
You can calculate more detailed screen dimension from the screen diagonal.
Screen width (SW) and screen height (SH)
SW (m) = SD (") x 0.0203
SH (m) = SD (") x 0.0152
Minimum distance (LW) and maximum distance (LT)
PT-LB80NTU: LW (m) = 0.0296 x SD (") - 0.039
LT (m) = 0.0358 x SD (") - 0.047
PT-LB75NTU: LW (m) = 0.0292 x SD (") - 0.036
LT (m) = 0.0351 x SD (") - 0.044
* The results above are approximate and may differ slightly from the actual measurements.
Screen size and throw distance
Projection size
(4 : 3)
Throw distance (L)
PT-LB80NTU / LB80U
Throw distance (L)
PT-LB78U / LB75NTU / LB75U
Screen diagonal
(SD)
Minimum distance
(LW)
Maximum distance
(LT)
Minimum distance
(LW)
Maximum distance
(LT)
33" (0.84 m)
1.1 m
(3'7")
1.1 m
(3'7")
40" (1.02 m)
1.1 m
(3'7")
1.4 m
(4'7")
1.1 m
(3'7")
1.4 m
(4'7")
50" (1.27 m)
1.4 m
(4'7")
1.7 m
(5'6")
1.4 m
(4'7")
1.7 m
(5'6")
60" (1.52 m)
1.7 m
(5'6")
2.1 m
(6'10")
1.7 m
(5'6")
2.1 m
(6'10")
70" (1.78 m)
2.0 m
(6'6")
2.5 m
(8'2")
2.0 m
(6'6")
2.4 m
(7'10")
80" (2.03 m)
2.3 m
(7'6")
2.8 m
(9'2")
2.3 m
(7'6")
2.8 m
(9'2")
90" (2.29 m)
2.6 m
(8'6")
3.2 m
(10'5")
2.6 m
(8'6")
3.1 m
(10'2")
100" (2.54 m)
2.9 m
(9'6")
3.5 m
(11'5")
2.9 m
(9'6")
3.5 m
(11'5")
120" (3.05 m)
3.5 m
(11'5")
4.2 m
(13'9")
3.5 m
(11'5")
4.2 m
(13'9")
150" (3.81 m)
4.4 m
(14'5")
5.3 m
(17'4")
4.3 m
(14'1")
5.2 m
(17')
200" (5.08 m)
5.9 m
(19'4")
7.1 m
(23'3")
5.8 m
(19')
7.0 m (22'11")
250" (6.35 m)
7.4 m
(24'3")
8.9 m
(29'2")
7.3 m (23'11")
8.7 m
(28'6")
300" (7.62 m)
8.8 m (28'10")
10.7 m
(35'1")
8.7 m
(28'6")
10.5 m
(34'5")
NOTE:
• See “Screen size and throw distance for 16:9 aspect ratio” on page 47.
• Do not use the projector at a raised or a horizontally tilted position as it may cause
malfunction of the projector.
• You can tilt the projector body approximately ± 30° vertically. Overtilting may result in
shortening the component’s life.
• For the best quality of the projection image, install a screen where sun light or room light
does not shine directly onto the screen. Close window shades or curtains to block the lights.
88.6
SD
SW
SH
Screen
Projected image