Jack, One thing is the focusing of the doublet of Lhires, done by measuring the fwhm of a spectral lamp line. In your case it seems ok. Another thing iszerib57
Robin, Attached are spectra of Vega this is the best focus I can achieve by altering both C14 and Atik focusing. Regards, Jack On 6 July 2015 at 23:37, 'Robinjackmartinuk60
Jose, I understand I will adjust the focussing on the C14 which may need collimating ? this has not been done by me however the Airy disc appears to be OK.jackmartinuk60
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