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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= 0.141732 x SD(m) - 0.050400
Max. (LT) L= 0.241339 x SD(m) - 0.049700
16:9
Min. (LW) L= 0.145672 x SD(m) - 0.050400
Max. (LT) L= 0.248048 x SD(m) - 0.049700
4:3
Min. (LW) L= 0.160455 x SD(m) - 0.050400
Max. (LT) L= 0.273219 x SD(m) - 0.049700
Fixed-focus Lens
ET-ELW21
16:10 L= 0.068965 x SD(m) - 0.057231
16:9 L= 0.070882 x SD(m) - 0.057231
4:3 L= 0.078075 x SD(m) - 0.057231
Short Zoom Lens ET-ELW20
16:10
Min. (LW) L= 0.107874 x SD(m) - 0.055400
Max. (LT) L= 0.146457 x SD(m) - 0.053400
16:9
Min. (LW) L= 0.110873 x SD(m) - 0.055400
Max. (LT) L= 0.150528 x SD(m) - 0.053400
4:3
Min. (LW) L= 0.122124 x SD(m) - 0.055400
Max. (LT) L= 0.165804 x SD(m) - 0.053400
Long Zoom Lens ET-ELT20
16:10
Min. (LW) L= 0.241417 x SD(m) - 0.113900
Max. (LT) L= 0.393504 x SD(m) - 0.112800
16:9
Min. (LW) L= 0.248129 x SD(m) - 0.113900
Max. (LT) L= 0.404443 x SD(m) - 0.112800
4:3
Min. (LW) L= 0.273309 x SD(m) - 0.113900
Max. (LT) L= 0.445486 x SD(m) - 0.112800
Ultra Long Zoom Lens ET-ELT21
16:10
Min. (LW) L= 0.394488 x SD(m) - 0.212700
Max. (LT) L= 0.626457 x SD(m) - 0.210700
16:9
Min. (LW) L= 0.405455 x SD(m) - 0.212700
Max. (LT) L= 0.643872 x SD(m) - 0.210700
4:3
Min. (LW) L= 0.4466 x SD(m) - 0.212700
Max. (LT) L= 0.709212 x SD(m) - 0.210700
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= 0.133465 x SD(m) - 0.055300
Max. (LT) L= 0.226772 x SD(m) - 0.048000
16:9
Min. (LW) L= 0.14541 x SD(m) - 0.055300
Max. (LT) L= 0.247068 x SD(m) - 0.048000
Fixed-focus Lens
ET-ELW21
4:3 L= 0.064961 x SD(m) - 0.058500
16:9 L= 0.070775 x SD(m) - 0.058500
Short Zoom Lens ET-ELW20
4:3
Min. (LW) L= 0.101181 x SD(m) - 0.055800
Max. (LT) L= 0.137795 x SD(m) - 0.054000
16:9
Min. (LW) L= 0.110237 x SD(m) - 0.055800
Max. (LT) L= 0.150128 x SD(m) - 0.054000
Long Zoom Lens ET-ELT20
4:3
Min. (LW) L= 0.226929 x SD(m) - 0.114200
Max. (LT) L= 0.370315 x SD(m) - 0.112900
16:9
Min. (LW) L= 0.247239 x SD(m) - 0.114200
Max. (LT) L= 0.403458 x SD(m) - 0.112900
Ultra Long Zoom Lens ET-ELT21
4:3
Min. (LW) L= 0.370906 x SD(m) - 0.213200
Max. (LT) L= 0.58937 x SD(m) - 0.210900
16:9
Min. (LW) L= 0.404102 x SD(m) - 0.213200
Max. (LT) L= 0.642119 x SD(m) - 0.210900