2017 November 23 Sun - huge filament
The solar surface is dominated by the huge filament which is to the south.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 50 mm (f/28) for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: Imperx 4M15
2017 November 23 Sun - huge filament
2017 November 23 Sun - huge filament
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