focus on emissionline by calibration spectrograph

[ebry]

Hi,

Is it possible in AA7 to focus on a calibration line of a spectrograph ? The intention is to focus the FWHM as small as possible with the spectrograph's internal focuser (no auto-focus). On a star this is perfectly possible, but apparently not on a line ? or am I wrong here ? Or is there a tip & trick how I can get this ? (I work with a LHiResIII spectrograph with grating 2400 l/mm)

thanking in advance !

all the best
Erik

[merlin66]

Erik,
The focus routine already does this.
Check the Astroart Guide (F1) within Astroart and search on Focuser/ "Autofocus"