Links om H-alfa solfoto m.v. fra mødet torsdag den 28.4.2016

http://www.skyandtelescope.com/observing/guide-to-observing-the-sun-in-h-alpha092321050923/

http://www.prairieastronomyclub.org/resources/solar-observing/observing-the-sun-in-h-alpha/

https://starizona.com/acb/ccd/software/ps_hargb.aspx