Chapter 2
Getting Started — Setting up
36 - ENGLISH
Lens type
Standard
zoom lens
Optional lens
Height position (H)
Short focus
zoom lens
Short focus
zoom lens
Long focus
zoom lens
Ultra long
focus zoom
lens
Projection Lens Model No. —
ET-ELW31
ET-ELW30 ET-ELT30 ET-ELT31
Standard zoom lens /
ET-ELW31 / ET-ELW30
/ ET-ELT30 / ET-ELT31
Throw ratio
*1
1.32-2.44:1 0.79-1.08:1 1.00-1.30:1 2.40-4.37:1 4.34-7.86:1
Projected image size Projection distance (L)
Diagonal (SD)
Height
(SH)
Width
(SW)
Min.
(LW)
Max.
(LT)
Min.
(LW)
Max.
(LT)
Min.
(LW)
Max.
(LT)
Min.
(LW)
Max.
(LT)
Min.
(LW)
Max.
(LT)
3.81 (150") 1.867 3.322 4.38 8.15 2.66 3.54 3.34 4.36 8.07 14.61 14.32 26.02
-
0.31 ~ 2.18
5.08 (200") 2.489 4.430 5.85 10.87 3.56 4.71 4.47 5.83 10.79 19.51 19.06 34.66
-
0.42 ~ 2.90
6.35 (250") 3.112 5.537 7.32 13.60 4.46 5.88 5.59 7.29 13.52 24.42 23.81 43.30
-
0.52 ~ 3.63
7.62 (300") 4.572 6.096 8.79 16.33 5.36 7.05 6.71 8.76 16.25 29.32 28.55 51.94
-
0.62 ~ 4.36
8.89 (350") 5.334 7.112 10.26 19.05 6.26 8.22 7.84 10.22 18.97 34.23 33.29 60.58
-
0.73 ~ 5.08
10.16 (400") 6.096 8.128 11.73 21.78 7.15 9.39 8.96 11.69 21.70 39.13 38.03 69.22
-
0.83 ~ 5.81
*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
Projection Lens
Model No.
Aspect ratio Projection distance (L) formula
Standard zoom lens —
16:10
Min. (LW) L = 1.0433 x SD
-
0.0326
Max. (LT) L = 1.9341 x SD
-
0.0328
16:9
Min. (LW) L = 1.0724 x SD
-
0.0326
Max. (LT) L = 1.9878 x SD
-
0.0328
4:3
Min. (LW) L = 1.1811 x SD
-
0.0326
Max. (LT) L = 2.1895 x SD
-
0.0328
Short focus zoom lens ET-ELW31
16:10
Min. (LW) L = 0.6373 x SD
-
0.0324
Max. (LT) L = 0.8295 x SD
-
0.0344
16:9
Min. (LW) L = 0.6550 x SD
-
0.0324
Max. (LT) L = 0.8526 x SD
-
0.0344
4:3
Min. (LW) L = 0.7215 x SD
-
0.0324
Max. (LT) L = 0.9391 x SD
-
0.0344
Short focus zoom lens ET-ELW30
16:10
Min. (LW) L = 0.7978 x SD
-
0.0326
Max. (LT) L = 1.0395 x SD
-
0.0341
16:9
Min. (LW) L = 0.8199 x SD
-
0.0326
Max. (LT) L = 1.0684 x SD
-
0.0341
4:3
Min. (LW) L = 0.9031 x SD
-
0.0326
Max. (LT) L = 1.1768 x SD
-
0.0341
Long focus zoom lens ET-ELT30
16:10
Min. (LW) L = 1.9341 x SD
-
0.1109
Max. (LT) L = 3.4825 x SD
-
0.1364
16:9
Min. (LW) L = 1.9879 x SD
-
0.1109
Max. (LT) L = 3.5793 x SD
-
0.1364
4:3
Min. (LW) L = 2.1896 x SD
-
0.1109
Max. (LT) L = 3.9424 x SD
-
0.1364
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