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ENGLISH - 33
Chapter 2 Getting Started — Setting up
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.
For PT-DW740U
Lens type
Projection lens Model No.
Aspect ratio Projection distance (L) formula
Standard zoom lens ―
16:10
Min. (LW) L = 1.5669 x SD (m) – 0.0746
Max. (LT) L = 2.1850 x SD (m) – 0.0725
16:9
Min. (LW) L = 1.6102 x SD (m) – 0.0746
Max. (LT) L = 2.2480 x SD (m) – 0.0725
4:3
Min. (LW) L = 1.7717 x SD (m) – 0.0746
Max. (LT) L = 2.4724 x SD (m) – 0.0725
Fixed-focus lens ET-DLE055
16:10 ― L = 0.7244 x SD (m) – 0.0476
16:9 ― L = 0.7441 x SD (m) – 0.0476
4:3 ― L = 0.8189 x SD (m) – 0.0476
Ultra-short focus zoom
lens
ET-DLE080
16:10
Min. (LW) L = 0.7205 x SD (m) – 0.0471
Max. (LT) L = 0.8937 x SD (m) – 0.0442
16:9
Min. (LW) L = 0.7402 x SD (m) – 0.0471
Max. (LT) L = 0.9173 x SD (m) – 0.0442
4:3
Min. (LW) L = 0.8150 x SD (m) – 0.0471
Max. (LT) L = 1.0118 x SD (m) – 0.0442
Short focus zoom lens ET-DLE150
16:10
Min. (LW) L = 1.1811 x SD (m) – 0.0540
Max. (LT) L = 1.7047 x SD (m) – 0.0498
16:9
Min. (LW) L = 1.2165 x SD (m) – 0.0540
Max. (LT) L = 1.7520 x SD (m) – 0.0498
4:3
Min. (LW) L = 1.3386 x SD (m) – 0.0540
Max. (LT) L = 1.9291 x SD (m) – 0.0498
Medium focus zoom lens ET-DLE250
16:10
Min. (LW) L = 2.0630 x SD (m) – 0.0800
Max. (LT) L = 3.2598 x SD (m) – 0.0792
16:9
Min. (LW) L = 2.1220 x SD (m) – 0.0800
Max. (LT) L = 3.3504 x SD (m) – 0.0792
4:3
Min. (LW) L = 2.3386 x SD (m) – 0.0800
Max. (LT) L = 3.6929 x SD (m) – 0.0792
Long focus zoom lens ET-DLE350
16:10
Min. (LW) L = 3.2559 x SD (m) – 0.1351
Max. (LT) L = 4.9173 x SD (m) – 0.1346
16:9
Min. (LW) L = 3.3465 x SD (m) – 0.1351
Max. (LT) L = 5.0551 x SD (m) – 0.1346
4:3
Min. (LW) L = 3.6850 x SD (m) – 0.1351
Max. (LT) L = 5.5669 x SD (m) – 0.1346
Ultra-long focus zoom lens ET-DLE450
16:10
Min. (LW) L = 4.9291 x SD (m) – 0.3017
Max. (LT) L = 7.7913 x SD (m) – 0.2991
16:9
Min. (LW) L = 5.0630 x SD (m) – 0.3017
Max. (LT) L = 8.0079 x SD (m) – 0.2991
4:3
Min. (LW) L = 5.5787 x SD (m) – 0.3017
Max. (LT) L = 8.8189 x SD (m) – 0.2991
For PT-DX810U
Lens type
Projection lens Model No.
Aspect ratio Projection distance (L) formula
Standard zoom lens ―
4:3
Min. (LW) L = 1.4567 x SD (m) – 0.0746
Max. (LT) L = 2.0354 x SD (m) – 0.0725
16:9
Min. (LW) L = 1.5866 x SD (m) – 0.0746
Max. (LT) L = 2.2165 x SD (m) – 0.0725
Fixed-focus lens ET-DLE055
4:3 ― L = 0.6732 x SD (m) – 0.0476
16:9 ― L = 0.7323 x SD (m) – 0.0476