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Panasonic PT-DZ680ULS User Manual

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ENGLISH - 31
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.
Lens type
Projection lens Model No.
Aspect ratio
Projection distance (L) formula
Standard zoom lens
―
16:10
Min. (LW)
L = 1.5551  x SD (m) – 0.0745
Max. (LT)
L = 2.0787  x SD (m) – 0.0734
16:9
Min. (LW)
L = 1.5984  x SD (m) – 0.0745
Max. (LT)
L = 2.1378  x SD (m) – 0.0734
4:3
Min. (LW)
L = 1.7598  x SD (m) – 0.0745
Max. (LT)
L = 2.3583  x SD (m) – 0.0734
Fixed-focus lens
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
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
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
ET-DLE250
16:10
Min. (LW)
L = 1.9695  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
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
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