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Chapter 2 Getting Started — Setting up
40 - ENGLISH
Formula to calculate projection distance per projection lens
To use a projected image size not listed in this manual, check the projected image 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.)
r Zoom lens
Projection lens Model No. Throw ratio Aspect ratio
Projection distance (L) formula
Min. (LW) Max. (LT)
ET-D75LE1
1.4 - 1.8:1 16:9 = 1.2152 x SD
-
0.0760 = 1.6236 x SD
-
0.1004
1.8 - 2.5:1 4:3 = 1.4872 x SD
-
0.0760 = 1.9870 x SD
-
0.1004
ET-D75LE2
1.8 - 2.8:1 16:9 = 1.6303 x SD
-
0.0795 = 2.4454 x SD
-
0.1064
2.5 - 3.7:1 4:3 = 1.9952 x SD
-
0.0795 = 2.9928 x SD
-
0.1064
ET-D75LE3
2.8 - 4.6:1 16:9 = 2.4454 x SD
-
0.0958 = 4.0841 x SD
-
0.1216
3.7 - 6.2:1 4:3 = 2.9928 x SD
-
0.0958 = 4.9983 x SD
-
0.1216
ET-D75LE4
4.7 - 7.4:1 16:9 = 4.0841 x SD
-
0.1158 = 6.4944 x SD
-
0.1013
6.2 - 9.9:1 4:3 = 4.9983 x SD
-
0.1158 = 7.9481 x SD
-
0.1013
ET-D75LE8
7.3 - 13.8:1 16:9 = 6.4950 x SD
-
0.3862 = 12.1692 x SD
-
0.3598
9.8 - 18.5:1 4:3 = 7.9489 x SD
-
0.3862 = 14.8932 x SD
-
0.3598
ET-D75LE6
0.9 - 1.1:1 16:9 = 0.8201 x SD
-
0.0566 = 0.9825 x SD
-
0.0736
1.2 - 1.5:1 4:3 = 1.0036 x SD
-
0.0566 = 1.2024 x SD
-
0.0736
ET-D75LE10
1.3 - 1.7:1 16:9 = 1.1497 x SD
-
0.0857 = 1.4860 x SD
-
0.1085
1.7 - 2.2:1 4:3 = 1.4070 x SD
-
0.0857 = 1.8186 x SD
-
0.1085
ET-D75LE20
1.7 - 2.4:1 16:9 = 1.4709 x SD
-
0.0832 = 2.1373 x SD
-
0.1162
2.2 - 3.2:1 4:3 = 1.8002 x SD
-
0.0832 = 2.6157 x SD
-
0.1162
ET-D75LE30
2.4 - 4.7:1 16:9 = 2.1221 x SD
-
0.1131 = 4.1155 x SD
-
0.1765
3.2 - 6.2:1 4:3 = 2.5971 x SD
-
0.1131 = 5.0367 x SD
-
0.1765
ET-D75LE40
4.6 - 7.4:1 16:9 = 4.0631 x SD
-
0.1577 = 6.4779 x SD
-
0.1615
6.2 - 9.9:1 4:3 = 4.9726 x SD
-
0.1577 = 7.9279 x SD
-
0.1615
r Fixed-focus lens
Projection lens Model No. Throw ratio Aspect ratio Projection distance (L) formula
ET-D75LE5
0.7:1 16:9 = 0.6258 x SD
-
0.0835
0.9:1 4:3 = 0.7659 x SD
-
0.0835
ET-D75LE50
0.7:1 16:9 = 0.6240 x SD
-
0.0713
0.9:1 4:3 = 0.7637 x SD
-
0.0713
Adjusting adjustable feet
Install the projector on a at surface so that the front of the projector is parallel to the screen surface and the projection screen is rectangular.
If the screen is tilted downward, the projection screen can be adjusted to be rectangular by adjusting the front adjustable feet. The adjustable
feet can also be used to adjust the projector to be level when it is tilted in the horizontal direction.
Extend the adjustable feet by rotating in the direction shown in the gure and retract by rotating in the opposite direction.
Adjustable range
Adjustable feet: Approx. 12 mm (15/32") each
Attention
f Heated air is expelled from the air exhaust port while the lamp is lit. Do not touch the air exhaust port directly when adjusting the adjustable
feet. (x page 29)