Projection dimensions calculation methods

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).

4:3

SH

 

 

 

 

 

 

LW/LT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW

 

 

 

 

 

 

 

 

 

 

 

 

 

Minimum Projection DistanceLW=0.0407xSD/0.0254-0.080

 

Maximum Projection DistanceLT=0.0538xSD/0.0254-0.0774

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

Minimum Projection Distance

LW=0.0443xSD/0.0254-0.080

Maximum Projection Distance

LT=0.0586xSD/0.0254-0.0774
*The values obtained from the formulas above are approximate.

Others

E NGLISH

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