Projection distance for 4:3 aspect ratio screen (If using the ET-DLE030)
Unit : meters
0.39:1
(0.41:1)
Unit : feet
Throw ratio
Diagonal
image
size
(Inches)
Diagonal
image
size
(m)
Height
(SH)
Width
(SW)
Ultra-short focal length lens ET-DLE030
Close-up system dimensions
From bottom of set
to bottom edge of
screen (A2)
From top of set to
bottom edge of
screen (A1)
From rear of
set to screen
(L4)
From front of
set to screen
(L3)
From tip of
lens to screen
(L2)
Projection distance
(From mirror reflective
surface to screen)
(L1)
0.39:1
(0.41:1)
Throw ratio
Diagonal
image
size
(Inches)
Diagonal
image
size
(m)
Height
(SH)
Width
(SW)
Ultra-short focal length lens ET-DLE030
Close-up system dimensions
From bottom of set
to bottom edge of
screen (A2)
From top of set to
bottom edge of
screen (A1)
From rear of
set to screen
(L4)
From front of
set to screen
(L3)
From tip of
lens to screen
(L2)
Projection distance
(From mirror reflective
surface to screen)
(L1)
Projection Distance Calculation Table
Screen aspect ratio 4:3
L1 (m) = 0.3133 x
Diagonal image size
+ 0.0047
Projection distance calculation formula
A1 (m) = 0.1881 x
Diagonal image size
- 0.0665
Calculation formula for distance from top of set to bottom edge of screen
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
Screen
A1
A2
L4
L1
L3
L2
* 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.
100
120
150
200
250
300
350
2.54
3.05
3.81
5.08
6.35
7.62
8.89
1.52
1.83
2.29
3.05
3.81
4.57
5.33
2.03
2.44
3.05
4.06
5.08
6.10
7.11
0.80
0.96
1.20
1.60
1.99
2.39
2.79
0.82
0.98
1.22
1.62
2.02
2.41
2.81
0.65
0.81
1.05
1.45
1.85
2.25
2.64
0.16
0.32
0.55
0.95
1.35
1.75
2.15
0.59
0.68
0.83
1.06
1.30
1.54
1.78
0.41
0.51
0.65
0.89
1.13
1.37
1.61
100
120
150
200
250
300
350
2.54
3.05
3.81
5.08
6.35
7.62
8.89
5.0
6.0
7.5
10.0
12.5
15.0
17.5
6.7
8.0
10.0
13.3
16.7
20.0
23.3
2.6
3.1
3.9
5.2
6.5
7.8
9.2
2.7
3.2
4.0
5.3
6.6
7.9
9.2
2.1
2.7
3.5
4.8
6.1
7.4
8.7
0.5
1.0
1.8
3.1
4.4
5.7
7.0
1.9
2.2
2.7
3.5
4.3
5.1
5.8
1.3
1.7
2.1
2.9
3.7
4.5
5.3
PT-
DX820W
/
DX820LW
/
DX820B
/
DX820LB
DLP™ Projectors
1 0 / 1 6
As of February 2017
S
FD15M025-
2
