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Getting Started
If the projector is used with a screen size not listed in this manual, check the diagonal dimension (inch) of your
screen and calculate the projection distance using the following formulas.
Calculation formulas for projection distance by lens types
Model number of
projection lens
Throw ratio Aspect ratio Projection distance (L) formula (Units: m)
Zoom lens
ET-D75LE1
2.0-2.7 : 1 4:3
Minimal distance : L = 0.0419 × Screen diagonal (inch) - 0.0760
Maximal distance: L = 0.0560 × Screen diagonal (inch) - 0.1004
1.5-2.0 : 1 16:9
Minimal distance : L = 0.0343 × Screen diagonal (inch) - 0.0760
Maximal distance: L = 0.0458 × Screen diagonal (inch) - 0.1004
ET-D75LE2
2.7-4.1 : 1 4:3
Minimal distance : L = 0.0563 × Screen diagonal (inch) - 0.0795
Maximal distance: L = 0.0844 × Screen diagonal (inch) - 0.1064
2.1-3.1 : 1 16:9
Minimal distance : L = 0.0460 × Screen diagonal (inch) - 0.0795
Maximal distance: L = 0.0689 × Screen diagonal (inch) - 0.1064
ET-D75LE3
4.1-6.9 : 1 4:3
Minimal distance : L = 0.0844 × Screen diagonal (inch) - 0.0958
Maximal distance: L = 0.1409 × Screen diagonal (inch) - 0.1216
3.1-5.2 : 1 16:9
Minimal distance : L = 0.0689 × Screen diagonal (inch) - 0.0958
Maximal distance: L = 0.1151 × Screen diagonal (inch) - 0.1216
ET-D75LE4
6.9-11.0 : 1 4:3
Minimal distance : L = 0.1409 × Screen diagonal (inch) - 0.1158
Maximal distance: L = 0.2241 × Screen diagonal (inch) - 0.1013
5.2-8.2 : 1 16:9
Minimal distance : L = 0.1151 × Screen diagonal (inch) - 0.1158
Maximal distance: L = 0.1831 × Screen diagonal (inch) - 0.1013
ET-D75LE8
10.9-20.6 : 1 4:3
Minimal distance : L = 0.2241 × Screen diagonal (inch) - 0.3862
Maximal distance: L = 0.4200 × Screen diagonal (inch) - 0.3598
8.2-15.4 : 1 16:9
Minimal distance : L = 0.1831 × Screen diagonal (inch) - 0.3862
Maximal distance: L = 0.3430 × Screen diagonal (inch) - 0.3598
ET-D75LE6
1.4-1.6 : 1 4:3
Minimal distance : L = 0.0283 × Screen diagonal (inch) - 0.0566
Maximal distance: L = 0.0339 × Screen diagonal (inch) - 0.0736
1.0-1.2 : 1 16:9
Minimal distance : L = 0.0231 × Screen diagonal (inch) - 0.0566
Maximal distance: L = 0.0277 × Screen diagonal (inch) - 0.0736
Fixed-focus
lens
ET-D75LE5
1.0 : 1 4:3 L = 0.0216 × Screen diagonal (inch) - 0.0835
0.8 : 1 16:9 L = 0.0176 × Screen diagonal (inch) - 0.0835