Dear all,
Can you say me if exist a formulae universal between FWHM and Airmass
FWHM = f(airmass)
Thanks for your response
Cordialement
Laurent Corp
http://astrosurf.com/lcorp
http://perso.wanadoo.fr/lcorp (site miroir)
ILOC Station : SU596
AAVSO-AFOEV Observer : CLZ