Solar active region AR2835 erupting with a flare ( the lighter coloured material to the lower and right of the spot itself).
A very hazy cloudy day, I had all the gear set ready to go the night before, but packed up when I saw the conditions. It dissipated for about 10-15 mins so I hurriedly setup again to capture a closer view of this Sun spot, the largest active region of 2021 so far.

Equipment Details:

Coronado PST
ASI174MM Mini
Celestron 2x barlow
Skywatcher SA2i mount.
Post-processing Details:

Best 25% of 500 frames captured in firecapture.
Stacked in autostakkert.
Sharpened in IMPPG.
Colour in GIMP.
Final contrast adjustment in Rawtherapee.