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Lens type
Projection Lens Model No.
Throw ratio
*1
Projected image size
Height
Width
Diagonal (SD)
(SH)
(SW)
3.81 (150")
1.867
3.322
5.08 (200")
2.489
4.430
6.35 (250")
3.112
5.537
7.62 (300")
4.572
6.096
8.89 (350")
5.334
7.112
10.16 (400")
6.096
8.128
*1 The throw ratio is based on the value during projection with the projected image size of 2.03 m (80").
Formula to calculate projection distance per projection lens
To use a screen size not listed in this manual, check the screen size SD (m) and use the respective formula to
calculate projection distance.
The unit of all the formulae is m. (Values obtained by the following calculation formulae contain a slight error.)
When calculating a projection distance using image size designation (value in inches), multiply the value in inches
by 0.0254 and substitute it into SD in the formula for calculating the projection distance.
For PT-EZ590, PT-EW650, PT-EW550
Lens type
Standard zoom lens
Short focus zoom lens
Short focus zoom lens
Long focus zoom lens
36 - ENGLISH
Chapter 2 Getting Started — Setting up
Standard
Short focus
zoom lens
zoom lens
—
ET-ELW31
1.32-2.44:1
0.79-1.08:1
Projection distance (L)
Min.
Max.
Min.
Max.
(LW)
(LT)
(LW)
(LT)
4.38
8.15
2.66
3.54
5.85
10.87
3.56
4.71
7.32
13.60
4.46
5.88
8.79
16.33
5.36
7.05
10.26 19.05
6.26
8.22
11.73
21.78
7.15
9.39
Projection Lens
Aspect ratio
Model No.
16:10
—
16:9
4:3
16:10
ET-ELW31
16:9
4:3
16:10
ET-ELW30
16:9
4:3
16:10
ET-ELT30
16:9
4:3
Optional lens
Short focus
Long focus
zoom lens
zoom lens
ET-ELW30
ET-ELT30
1.00-1.30:1
2.40-4.37:1
Min.
Max.
Min.
Max.
(LW)
(LT)
(LW)
(LT)
3.34
4.36
8.07
14.61 14.32 26.02
4.47
5.83
10.79 19.51 19.06 34.66
5.59
7.29
13.52 24.42 23.81 43.30
6.71
8.76
16.25 29.32 28.55 51.94
7.84
10.22 18.97 34.23 33.29 60.58
8.96
11.69
21.70 39.13 38.03 69.22
Projection distance (L) formula
Min. (LW)
L = 1.0433 x SD - 0.0326
Max. (LT)
L = 1.9341 x SD - 0.0328
Min. (LW)
L = 1.0724 x SD - 0.0326
Max. (LT)
L = 1.9878 x SD - 0.0328
Min. (LW)
L = 1.1811 x SD - 0.0326
Max. (LT)
L = 2.1895 x SD - 0.0328
Min. (LW)
L = 0.6373 x SD - 0.0324
Max. (LT)
L = 0.8295 x SD - 0.0344
Min. (LW)
L = 0.6550 x SD - 0.0324
Max. (LT)
L = 0.8526 x SD - 0.0344
Min. (LW)
L = 0.7215 x SD - 0.0324
Max. (LT)
L = 0.9391 x SD - 0.0344
Min. (LW)
L = 0.7978 x SD - 0.0326
Max. (LT)
L = 1.0395 x SD - 0.0341
Min. (LW)
L = 0.8199 x SD - 0.0326
Max. (LT)
L = 1.0684 x SD - 0.0341
Min. (LW)
L = 0.9031 x SD - 0.0326
Max. (LT)
L = 1.1768 x SD - 0.0341
Min. (LW)
L = 1.9341 x SD - 0.1109
Max. (LT)
L = 3.4825 x SD - 0.1364
Min. (LW)
L = 1.9879 x SD - 0.1109
Max. (LT)
L = 3.5793 x SD - 0.1364
Min. (LW)
L = 2.1896 x SD - 0.1109
Max. (LT)
L = 3.9424 x SD - 0.1364
Ultra long
Height position (H)
focus zoom
lens
ET-ELT31
4.34-7.86:1
Standard zoom lens /
ET-ELW31 / ET-ELW30
/ ET-ELT30 / ET-ELT31
Min.
Max.
(LW)
(LT)
-0.31 ~ 2.18
-0.42 ~ 2.90
-0.52 ~ 3.63
-0.62 ~ 4.36
-0.73 ~ 5.08
-0.83 ~ 5.81
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