Panasonic PT-LB20S User Manual

If the screen size (diagonal) is SD (m), then the following formula is used to
calculate the projection distance for the wide lens position (LW) and the
projection distance for the telephoto lens position (LT).

*The values obtained from the formulas above are approximate.

For 16:9 aspect ratios, the following formula can be used to calculate the
projection distance.

SD

SW

4:3

LW/LT

H1

SH

LW=0.030xSD/0.0254-0.037

LT=0.036xSD/0.0254-0.037

LW=0.031xSD/0.0254-0.038

LT=0.037xSD/0.0254-0.038

LW=0.035xSD/0.0254-0.037

LT=0.042xSD/0.0254-0.036

LW=0.032xSD/0.0254-0.037

LT=0.039xSD/0.0254-0.037

LW=0.033xSD/0.0254-0.038

LT=0.040xSD/0.0254-0.038

LW=0.038xSD/0.0254-0.037

LT=0.046xSD/0.0254-0.037