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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.
ET-D75LE1
ET-D75LE2
ET-D75LE3
ET-D75LE4
ET-D75LE8
ET-D75LE6
ET-D75LE10
ET-D75LE20
ET-D75LE30
ET-D75LE40
r Fixed-focus lens
Projection lens Model No.
ET-D75LE5
ET-D75LE50
Adjusting adjustable feet
Install the projector on a flat 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 figure and retract by rotating in the opposite direction.
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)
40 - ENGLISH
Chapter 2 Getting Started — Setting up
Throw ratio
Aspect ratio
1.4 - 1.8:1
16:9
1.8 - 2.5:1
4:3
1.8 - 2.8:1
16:9
2.5 - 3.7:1
4:3
2.8 - 4.6:1
16:9
3.7 - 6.2:1
4:3
4.7 - 7.4:1
16:9
6.2 - 9.9:1
4:3
7.3 - 13.8:1
16:9
9.8 - 18.5:1
4:3
0.9 - 1.1:1
16:9
1.2 - 1.5:1
4:3
1.3 - 1.7:1
16:9
1.7 - 2.2:1
4:3
1.7 - 2.4:1
16:9
2.2 - 3.2:1
4:3
2.4 - 4.7:1
16:9
3.2 - 6.2:1
4:3
4.6 - 7.4:1
16:9
6.2 - 9.9:1
4:3
Throw ratio
Aspect ratio
0.7:1
16:9
0.9:1
4:3
0.7:1
16:9
0.9:1
4:3
Projection distance (L) formula
Min. (LW)
= 1.2152 x SD - 0.0760
= 1.4872 x SD - 0.0760
= 1.6303 x SD - 0.0795
= 1.9952 x SD - 0.0795
= 2.4454 x SD - 0.0958
= 2.9928 x SD - 0.0958
= 4.0841 x SD - 0.1158
= 4.9983 x SD - 0.1158
= 6.4950 x SD - 0.3862
= 7.9489 x SD - 0.3862
= 0.8201 x SD - 0.0566
= 1.0036 x SD - 0.0566
= 1.1497 x SD - 0.0857
= 1.4070 x SD - 0.0857
= 1.4709 x SD - 0.0832
= 1.8002 x SD - 0.0832
= 2.1221 x SD - 0.1131
= 2.5971 x SD - 0.1131
= 4.0631 x SD - 0.1577
= 4.9726 x SD - 0.1577
Projection distance (L) formula
= 0.6258 x SD - 0.0835
= 0.7659 x SD - 0.0835
= 0.6240 x SD - 0.0713
= 0.7637 x SD - 0.0713
Adjustable range
Adjustable feet: Approx. 12 mm (15/32") each
Max. (LT)
= 1.6236 x SD - 0.1004
= 1.9870 x SD - 0.1004
= 2.4454 x SD - 0.1064
= 2.9928 x SD - 0.1064
= 4.0841 x SD - 0.1216
= 4.9983 x SD - 0.1216
= 6.4944 x SD - 0.1013
= 7.9481 x SD - 0.1013
= 12.1692 x SD - 0.3598
= 14.8932 x SD - 0.3598
= 0.9825 x SD - 0.0736
= 1.2024 x SD - 0.0736
= 1.4860 x SD - 0.1085
= 1.8186 x SD - 0.1085
= 2.1373 x SD - 0.1162
= 2.6157 x SD - 0.1162
= 4.1155 x SD - 0.1765
= 5.0367 x SD - 0.1765
= 6.4779 x SD - 0.1615
= 7.9279 x SD - 0.1615
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