Panasonic PT-LW312 Operating Instructions (Functional Manual) page 29

Projection distance formulas
To use a screen size not listed in this manual, check the screen 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.)
If you want to calculate the projection distance with projected image size SD (unit: inch) by substituting, please assign 0.0254
times to the SD value.
For PT-LW362
Screen height (SH)
Screen width (SW)
Minimum distance (LW) = 1.4369 × SD - 0.025
Maximum distance (LT)
For PT-LW312
Screen height (SH)
Screen width (SW)
Minimum distance (LW) = 1.4332 × SD - 0.02327
Maximum distance (LT)
For PT-LB412, PT-LB382 and PT-LB332
Screen height (SH)
Screen width (SW)
Minimum distance (LW) = 1.1974 × SD - 0.025
Maximum distance (LT)
Chapter 2 Getting Started - Setting up
4:3 aspect ratio
= 0.6 × SD
= 0.8 × SD
= 1.7263 × SD - 0.025
4:3 aspect ratio
= 0.6 × SD
= 0.8 × SD
= 1.7202 × SD - 0.02367
4:3 aspect ratio
= 0.6 × SD
= 0.8 × SD
= 1.4386 × SD - 0.025
16:9 aspect ratio
= 0.490 × SD
= 0.872 × SD
= 1.3045 × SD - 0.025
= 1.5673 × SD - 0.025
16:9 aspect ratio
= 0.490 × SD
= 0.872 × SD
= 1.3008 × SD - 0.02327
= 1.5615 × SD - 0.02367
= 0.490 × SD
= 0.872 × SD
= 1.3045 × SD - 0.025
= 1.5673 × SD - 0.025
16:10 aspect ratio
= 0.530 × SD
= 0.848 × SD
= 1.2692 × SD - 0.025
= 1.5249 × SD - 0.025
16:10 aspect ratio
= 0.530 × SD
= 0.848 × SD
= 1.2660 × SD - 0.02327
= 1.5195 × SD - 0.02367
16:9 aspect ratio
ENGLISH - 29