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L20 adjustment for zoom object depth
 

 Justagetool:
     
  After entering the maximum permissible speed and the longitudinal inclination, the minimum and maximum distance (L20 circle) of the luminance camera to the tunnel portal is calculated.

The formula is based on DIN 67524-1, Annex D. (old)
The formula is based on DIN 67524-1, Annex C.
(new)
 
     
   L20 adjustment for zoom lenses   
     
Note: All data and calculations without guarantee  
Source: DIN 67524-1, Annex D (old)
DIN 67524-1, Annex C (new)