Panasonic PT-DX820LW Manual - Page 10

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DLP™ Projectors

Projection distance for 4:3 aspect ratio screen (If using the ET-DLE030)

Throw ratio
Diagonal
Diagonal
Height
Width
image
image
(SH)
(SW)
size
size
(Inches)
(m)
100
2.54
1.52
2.03
120
3.05
1.83
2.44
150
3.81
2.29
3.05
200
5.08
3.05
4.06
250
6.35
3.81
5.08
300
7.62
4.57
6.10
350
8.89
5.33
7.11
Throw ratio
Diagonal
Diagonal
Height
Width
image
image
(SH)
(SW)
size
size
(Inches)
(m)
2.54
5.0
6.7
100
120
3.05
6.0
8.0
150
3.81
7.5
10.0
200
5.08
10.0
13.3
250
6.35
12.5
16.7
300
7.62
15.0
20.0
350
8.89
17.5
23.3
* The value for L1 may contain an error of within ±5%.
* When using vertical keystone correction, the images will be corrected so that they will tend to be smaller than the specified screen size.
* This measurement is not the distance between the rear of the projector and the wall, but is instead the distance between the rear of the projector and the screen surface.
Leave at least 500 mm of space between the rear of the projector and the wall and any other objects in order to provide adequate ventilation space. If setting up the
projector in a closed room, be sure to provide separate air conditioning and ventilation equipment. If there is insufficient ventilation in the room, radiated heat may build up
and cause the protection circuit of the projector to operate.
A1
A2
L4
Projection Distance Calculation Table
Screen aspect ratio 4:3
Projection distance calculation formula
Calculation formula for distance from top of set to bottom edge of screen
As of February 2017
SFD15M025-2
PT-DX820W/DX820LW/DX820B/DX820LB
0.39:1
(0.41:1)
Projection distance
From tip of
(From mirror reflective
lens to screen
surface to screen)
(L2)
(L1)
0.80
0.82
0.96
0.98
1.20
1.22
1.60
1.62
1.99
2.02
2.39
2.41
2.79
2.81
0.39:1
(0.41:1)
Projection distance
From tip of
(From mirror reflective
lens to screen
surface to screen)
(L2)
(L1)
2.6
2.7
3.1
3.2
3.9
4.0
5.2
5.3
6.5
6.6
7.8
7.9
9.2
9.2
L2
L1
L3
L1 (m) = 0.3133 x Diagonal image size + 0.0047
A1 (m) = 0.1881 x Diagonal image size - 0.0665
Ultra-short focal length lens
ET-DLE030
Close-up system dimensions
From front of
From rear of
set to screen
set to screen
(L3)
(L4)
0.65
0.16
0.81
0.32
1.05
0.55
1.45
0.95
1.85
1.35
2.25
1.75
2.64
2.15
Ultra-short focal length lens
ET-DLE030
Close-up system dimensions
From front of
From rear of
set to screen
set to screen
(L3)
(L4)
2.1
0.5
2.7
1.0
3.5
1.8
4.8
3.1
6.1
4.4
7.4
5.7
8.7
7.0
L1: Projection distance
(from screen to mirror reflective surface)
L2: From screen to tip of lens
L3: From screen to front of set
L4: From screen to rear of set
A1: From bottom edge of screen to top of set
A2: From bottom edge of screen to bottom of set
Unit : meters
From top of set to
From bottom of set
bottom edge of
to bottom edge of
screen (A1)
screen (A2)
0.59
0.41
0.51
0.68
0.65
0.83
0.89
1.06
1.30
1.13
1.37
1.54
1.61
1.78
Unit : feet
From top of set to
From bottom of set
bottom edge of
to bottom edge of
screen (A1)
screen (A2)
1.9
1.3
1.7
2.2
2.1
2.7
2.9
3.5
4.3
3.7
4.5
5.1
5.3
5.8
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