2017 October 4 Sun
AR12682 near the W limb. Its activity seems to be subsided but this may be due to foreshortening effect. The curved filament is still persisting.
AR12683 shows more activity as several flares comes from the south of the sunspot.
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 October 4 Sun
2017 October 4 Sun
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