focus on emissionline by calibration spectrograph
Posted: 05 Dec 2020, 09:22
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
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)
all the best
Erik