2017 October 31 Sun - AR12685

[PTS]

2017 October 31 Sun - AR12685

Of the 2 dark filaments, the one on the E is long and thin, coming among evidence of plasma streams. The one on the w is much shorter. A tiny flare shows up through out the observation.

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

[PTS]

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[Eddy So]