Panasonic PT-DW750 Operating Instructions Manual page 44

Formula to calculate projection distance per projection lens
To use a projected image size not listed in this manual, check the projected image size SD (m) and use the
respective formula to calculate projection distance.
The unit of all the formulae is m. (Values obtained by the following calculation formulae contain a slight error.)
When calculating a projection distance using image size designation (value in inches), multiply the value in inches
by 0.0254 and substitute it into SD in the formula for calculating the projection distance.
For PT-DZ780
r Standard zoom lens
Projection lens Model No.
―
r Zoom lens
Projection lens Model No.
ET-DLE080/
ET-DLE085
ET-DLE150
ET-DLE250
ET-DLE350
ET-DLE450
r For fixed-focus lens (Model No.: ET-DLE055)
Projection lens Model No.
ET-DLE055
r For fixed-focus lens (Model No.: ET-DLE030)
Projection lens Model No.
ET-DLE030
44 - ENGLISH
Chapter 2 Getting Started — Setting up
Throw ratio Aspect ratio
1.7 - 2.4:1 16:10
1.7 - 2.4:1 16:9
2.1 - 2.9:1 4:3
Throw ratio Aspect ratio
0.8 - 1.0:1 16:10
0.8 - 1.0:1 16:9
0.9 - 1.2:1 4:3
1.3 - 1.9:1 16:10
1.3 - 1.9:1 16:9
1.6 - 2.3:1 4:3
2.3 - 3.6:1 16:10
2.3 - 3.6:1 16:9
2.7 - 4.3:1 4:3
3.6 - 5.4:1 16:10
3.6 - 5.4:1 16:9
4.3 - 6.5:1 4:3
5.4 - 8.6:1 16:10
5.4 - 8.6:1 16:9
6.5 - 10.3:1 4:3
Throw ratio Aspect ratio
0.8:1 16:10
0.8:1 16:9
0.9:1 4:3
Throw ratio Aspect ratio
0.38:1 16:10
0.38:1 16:9
0.46:1 4:3
Projection distance (L) formula
Min. (LW)
= 1.4906 x SD - 0.0746
= 1.5320 x SD - 0.0746
= 1.6874 x SD - 0.0746
Projection distance (L) formula
Min. (LW)
= 0.6865 x SD - 0.0471
= 0.7056 x SD - 0.0471
= 0.7772 x SD - 0.0471
= 1.1259 x SD - 0.0540
= 1.1572 x SD - 0.0540
= 1.2747 x SD - 0.0540
= 1.9665 x SD - 0.0800
= 2.0212 x SD - 0.0800
= 2.2263 x SD - 0.0800
= 3.1000 x SD - 0.1351
= 3.1862 x SD - 0.1351
= 3.5094 x SD - 0.1351
= 4.6931 x SD - 0.3017
= 4.8236 x SD - 0.3017
= 5.3129 x SD - 0.3017
Projection distance (L) formula
= 0.6893 x SD - 0.0476
= 0.7084 x SD - 0.0476
= 0.7803 x SD - 0.0476
Projection distance (L1)
formula
= 0.3205 x SD + 0.0047
= 0.3294 x SD + 0.0047
= 0.3628 x SD + 0.0047
Max. (LT)
= 2.0814 x SD - 0.0725
= 2.1393 x SD - 0.0725
= 2.3563 x SD - 0.0725
Max. (LT)
= 0.8498 x SD - 0.0442
= 0.8735 x SD - 0.0442
= 0.9621 x SD - 0.0442
= 1.6243 x SD - 0.0498
= 1.6695 x SD - 0.0498
= 1.8388 x SD - 0.0498
= 3.1059 x SD - 0.0792
= 3.1923 x SD - 0.0792
= 3.5161 x SD - 0.0792
= 4.6843 x SD - 0.1346
= 4.8146 x SD - 0.1346
= 5.3030 x SD - 0.1346
= 7.4193 x SD - 0.2991
= 7.6256 x SD - 0.2991
= 8.3992 x SD - 0.2991
Formula for distance between
projector and screen (A1)
= 0.1977 x SD - 0.0671
= 0.2304 x SD - 0.0671
= 0.2238 x SD - 0.0671