How to capture sunspots

Sunspots come and go on a timescale of days to weeks, and the Sun rotates once every 27 days or so as seen from Earth. So a group takes about two weeks to march from one limb to the other. This group is my favorite because I got to capture it several times over 5 days. Tried all kind of things with the Dwarf3, from filters to exposures. For the curious, details posted here: https://dwarfastro.com/2026/07/08/shooting-sunspots-dwarf-3/

#Astronomy

08-02 07:45 · United States Massachusetts

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