nominale Lichtstärke  L=Df{\displaystyle \displaystyle L={\frac {D}{f}}}{\displaystyle \displaystyle L={\frac {D}{f}}}effektive Lichtstärke  Leff=Db=L1A+1{\displaystyle \displaystyle L_{\mathrm {eff} }={\frac {D}{b}}=L{\frac {1}{A+1}}}{\displaystyle \displaystyle L_{\mathrm {eff} }={\frac {D}{b}}=L{\frac {1}{A+1}}} Bildwinkel:  2⋅arctan⁡(d2⋅f){\displaystyle 2\cdot \arctan \left({\frac {d}{2\cdot f}}\right)}{\displaystyle 2\cdot \arctan \left({\frac {d}{2\cdot f}}\right)}effektiver Bildwinkel:  2⋅arctan⁡(d2⋅b)=2⋅arctan⁡(d2⋅f(A+1)){\displaystyle 2\cdot \arctan \left({\frac {d}{2\cdot b}}\right)=2\cdot \arctan \left({\frac {d}{2\cdot f\left(A+1\right)}}\right)}{\displaystyle 2\cdot \arctan \left({\frac {d}{2\cdot b}}\right)=2\cdot \arctan \left({\frac {d}{2\cdot f\left(A+1\right)}}\right)}
Entfernung ∞
Nahbereich
nominale Lichtstärke  L=Df{\displaystyle \displaystyle L={\frac {D}{f}}}{\displaystyle \displaystyle L={\frac {D}{f}}}effektive Lichtstärke  Leff=Db=L1A+1{\displaystyle \displaystyle L_{\mathrm {eff} }={\frac {D}{b}}=L{\frac {1}{A+1}}}{\displaystyle \displaystyle L_{\mathrm {eff} }={\frac {D}{b}}=L{\frac {1}{A+1}}} Bildwinkel:  2⋅arctan⁡(d2⋅f){\displaystyle 2\cdot \arctan \left({\frac {d}{2\cdot f}}\right)}{\displaystyle 2\cdot \arctan \left({\frac {d}{2\cdot f}}\right)}effektiver Bildwinkel:  2⋅arctan⁡(d2⋅b)=2⋅arctan⁡(d2⋅f(A+1)){\displaystyle 2\cdot \arctan \left({\frac {d}{2\cdot b}}\right)=2\cdot \arctan \left({\frac {d}{2\cdot f\left(A+1\right)}}\right)}{\displaystyle 2\cdot \arctan \left({\frac {d}{2\cdot b}}\right)=2\cdot \arctan \left({\frac {d}{2\cdot f\left(A+1\right)}}\right)}