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Setting up
ENGLISH -
31
Getting Started
If the projector is used with a screen size not listed in this manual, check the diagonal dimension (m) of your
screen and calculation the projection distance using the following formula.
Calculation formulas for projection distance by lens types
J
(for EZ570 series)
Lens type Aspect ratio Projection distance (L) formula
The standard zoom
lens
16:10
Min. (LW) L= 0.138996 x SD(m) - 0.054882
Max. (LT) L= 0.236398 x SD(m) - 0.048228
16:9
Min. (LW) L= 0.14286 x SD(m) - 0.054882
Max. (LT) L= 0.242969 x SD(m) - 0.048228
4:3
Min. (LW) L= 0.157357 x SD(m) - 0.054882
Max. (LT) L= 0.267626 x SD(m) - 0.048228
Fixed-focus Lens
ET-ELW21
16:10 L= 0.06763 x SD(m) - 0.057678
16:9 L= 0.06951 x SD(m) - 0.057678
4:3 L= 0.076564 x SD(m) - 0.057678
Short Zoom Lens ET-ELW20
16:10
Min. (LW) L= 0.105575 x SD(m) - 0.055497
Max. (LT) L= 0.143744 x SD(m) - 0.053400
16:9
Min. (LW) L= 0.10851 x SD(m) - 0.055497
Max. (LT) L= 0.14774 x SD(m) - 0.053400
4:3
Min. (LW) L= 0.119521 x SD(m) - 0.055497
Max. (LT) L= 0.162733 x SD(m) - 0.053400
Long Zoom Lens ET-ELT20
16:10
Min. (LW) L= 0.236622 x SD(m) - 0.114022
Max. (LT) L= 0.385831 x SD(m) - 0.112874
16:9
Min. (LW) L= 0.2432 x SD(m) - 0.114022
Max. (LT) L= 0.396557 x SD(m) - 0.112874
4:3
Min. (LW) L= 0.26788 x SD(m) - 0.114022
Max. (LT) L= 0.436799 x SD(m) - 0.112874
Ultra Long Zoom Lens ET-ELT21
16:10
Min. (LW) L= 0.386669 x SD(m) - 0.212284
Max. (LT) L= 0.614157 x SD(m) - 0.210772
16:9
Min. (LW) L= 0.397419 x SD(m) - 0.212284
Max. (LT) L= 0.631231 x SD(m) - 0.210772
4:3
Min. (LW) L= 0.437748 x SD(m) - 0.212284
Max. (LT) L= 0.695288 x SD(m) - 0.210772