Photographer: David Hajnal Image Title: Solar Surface Telescope Used: Lunt LS50THa 50mm Pressure Tuned H-alpha Telescope Filter Used: N/A Camera Used: Other Date Taken: 02/16/2019 This photo shows the sun in H-alpha light. It is a selected single exposure, which I processed HDR-like and colored afterwards. In addition to a filament-shaped structure on the surface, fine protuberances are also visible on the edge.