Variable => the results then depends on the merit function criterion (eg, it could be RMS Spot Radius) x}F.<`
!Ng^k>*h
Marginal Ray height => when Pupil Zone setting is 0, you are focus on paraxial focal plane; useful when your system is close to paraxial region. If Pupil Zone is not 0 real ray tracing is used, In general, it' risky to use this option as you only use marginal ray to determine where you focal plane is going to be. %s<7|,
zW+Y{^hf
quick focus: this is take you to the location where RMS Spot Size is minimum. MA"iM+Ar