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28 - ENGLISH
Getting Started
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Projection distance formulas by projection lens
To use a screen size not listed in this manual, check the screen size SD and use the following formula to calculate
projection distance.
The unit of the calculation result is m.
Lens type Aspect ratio Projection distance (L) formula
Standard zoom lens ―
16:10
Min. (LW) L = 1.4921 x SD (m) – 0.0746
Max. (LT) L = 2.0433 x SD (m) – 0.0725
16:9
Min. (LW) L = 1.5315 x SD (m) – 0.0746
Max. (LT) L = 2.1378 x SD (m) – 0.0725
4:3
Min. (LW) L = 1.6890 x SD (m) – 0.0746
Max. (LT) L = 2.3583 x SD (m) – 0.0725
Fixed-focus lens Model No.: ET-DLE055
16:10 ― L = 0.6890 x SD (m) – 0.0476
16:9 ― L = 0.7087 x SD (m) – 0.0476
4:3 ― L = 0.7795 x SD (m) – 0.0476
Ultra-short focus zoom lens Model No.: ET-DLE080
16:10
Min. (LW) L = 0.6850 x SD (m) – 0.0471
Max. (LT) L = 0.8504 x SD (m) – 0.0442
16:9
Min. (LW) L = 0.7047 x SD (m) – 0.0471
Max. (LT) L = 0.8740 x SD (m) – 0.0442
4:3
Min. (LW) L = 0.7756 x SD (m) – 0.0471
Max. (LT) L = 0.9606 x SD (m) – 0.0442
Short focus zoom lens Model No.: ET-DLE150
16:10
Min. (LW) L = 1.1260 x SD (m) – 0.0540
Max. (LT) L = 1.6260 x SD (m) – 0.0498
16:9
Min. (LW) L = 1.1575 x SD (m) – 0.0540
Max. (LT) L = 1.6693 x SD (m) – 0.0498
4:3
Min. (LW) L = 1.2756 x SD (m) – 0.0540
Max. (LT) L = 1.8386 x SD (m) – 0.0498
Medium focus zoom lens Model No.: ET-DLE250
16:10
Min. (LW) L = 1.9685 x SD (m) – 0.0800
Max. (LT) L = 3.1063 x SD (m) – 0.0792
16:9
Min. (LW) L = 2.0197 x SD (m) – 0.0800
Max. (LT) L = 3.1929 x SD (m) – 0.0792
4:3
Min. (LW) L = 2.2244 x SD (m) – 0.0800
Max. (LT) L = 3.5157 x SD (m) – 0.0792
Long focus zoom lens Model No.: ET-DLE350
16:10
Min. (LW) L = 3.0984 x SD (m) – 0.1351
Max. (LT) L = 4.6850 x SD (m) – 0.1346
16:9
Min. (LW) L = 3.1850 x SD (m) – 0.1351
Max. (LT) L = 4.8150 x SD (m) – 0.1346
4:3
Min. (LW) L = 3.5079 x SD (m) – 0.1351
Max. (LT) L = 5.3031 x SD (m) – 0.1346
Ultra-long focus zoom lens Model No.: ET-DLE450
16:10
Min. (LW) L = 4.6929 x SD (m) – 0.3017
Max. (LT) L = 7.4213 x SD (m) – 0.2991
16:9
Min. (LW) L = 4.8228 x SD (m) – 0.3017
Max. (LT) L = 7.6260 x SD (m) – 0.2991
4:3
Min. (LW) L = 5.3110 x SD (m) – 0.3017
Max. (LT) L = 8.3976 x SD (m) – 0.2991