Sunspots in July 2013
Detector: Foveon X3F 3-color sandwich CMOS. Telescope DEBAG refractor, 10 cm pupil, 92 cm FL. Solar Filter (Baader), OD=3.8. The vertically layered detector easily reveals the color-dependence of the solar limb darkening.
Image recorded by the students and instructors of the class "Beobachtungsmethoden und Instrumente SS2013" for the Solar Activity Monitoring Program SAM.