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Calculation formulas for projection distance by lens types
J
(for EW630 series, EW530 series)
Lens type Aspect ratio Projection distance (L) formula
The standard zoom
lens
16:10
Min. (LW) L= 1.407382 x SD(m) - 0.055300
Max. (LT) L= 2.391303 x SD(m) - 0.048000
16:9
Min. (LW) L= 1.446512 x SD(m) - 0.055300
Max. (LT) L= 2.457790 x SD(m) - 0.048000
4:3
Min. (LW) L= 1.593265 x SD(m) - 0.055300
Max. (LT) L= 2.707141 x SD(m) - 0.048000
Fixed-focus Lens ET-ELW21
16:10 L= 0.685009 x SD(m) - 0.058500
16:9 L= 0.704054 x SD(m) - 0.058500
4:3 L= 0.775483 x SD(m) - 0.058500
Short Zoom Lens ET-ELW20
16:10
Min. (LW) L= 1.066953 x SD(m) - 0.055800
Max. (LT) L= 1.453049 x SD(m) - 0.054000
16:9
Min. (LW) L= 1.096618 x SD(m) - 0.055800
Max. (LT) L= 1.493449 x SD(m) - 0.054000
4:3
Min. (LW) L= 1.207874 x SD(m) - 0.055800
Max. (LT) L= 1.644964 x SD(m) - 0.054000
Long Zoom Lens ET-ELT20
16:10
Min. (LW) L= 2.392964 x SD(m) - 0.114200
Max. (LT) L= 3.904965 x SD(m) - 0.112900
16:9
Min. (LW) L= 2.459496 x SD(m) - 0.114200
Max. (LT) L= 4.013536 x SD(m) - 0.112900
4:3
Min. (LW) L= 2.709021 x SD(m) - 0.114200
Max. (LT) L= 4.420724 x SD(m) - 0.112900
Ultra Long Zoom Lens ET-ELT21
16:10
Min. (LW) L= 3.911192 x SD(m) - 0.213200
Max. (LT) L= 6.214897 x SD(m) - 0.210900
16:9
Min. (LW) L= 4.019937 x SD(m) - 0.213200
Max. (LT) L= 6.387693 x SD(m) - 0.210900
4:3
Min. (LW) L= 4.427774 x SD(m) - 0.213200
Max. (LT) L= 7.035747 x SD(m) - 0.210900
Calculation formulas for projection distance by lens types
J
(for EX600 series, EX500 series)
Lens type Aspect ratio Projection distance (L) formula
The standard zoom
lens
4:3
Min. (LW) L= 1.340488 x SD(m) - 0.055300
Max. (LT) L= 2.277643 x SD(m) - 0.048000
16:9
Min. (LW) L= 1.460420 x SD(m) - 0.055300
Max. (LT) L= 2.481422 x SD(m) - 0.048000
Fixed-focus Lens ET-ELW21
4:3 L= 0.652450 x SD(m) - 0.058500
16:9 L= 0.710824 x SD(m) - 0.058500
Short Zoom Lens ET-ELW20
4:3
Min. (LW) L= 1.016240 x SD(m) - 0.055800
Max. (LT) L= 1.383984 x SD(m) - 0.054000
16:9
Min. (LW) L= 1.107162 x SD(m) - 0.055800
Max. (LT) L= 1.507809 x SD(m) - 0.054000
Long Zoom Lens ET-ELT20
4:3
Min. (LW) L= 2.279224 x SD(m) - 0.114200
Max. (LT) L= 3.719359 x SD(m) - 0.112900
16:9
Min. (LW) L= 2.483145 x SD(m) - 0.114200
Max. (LT) L= 4.052128 x SD(m) - 0.112900
Ultra Long Zoom Lens ET-ELT21
4:3
Min. (LW) L= 3.725290 x SD(m) - 0.213200
Max. (LT) L= 5.919499 x SD(m) - 0.210900
16:9
Min. (LW) L= 4.058590 x SD(m) - 0.213200
Max. (LT) L= 6.449113 x SD(m) - 0.210900