While shooting a normal Hawaiian sunrise, captured sunspots 1131 and 1133. Canon 5D MarkII, Canon 600mm w/.025 extender. ISO 400, F8, 1/8000 Took several exposures. Showing the best two images.
This was a huge prominance and I was surprised to get the great results in CaK. My Halpha image does not show the detail as this one. there is an other very dim Prominance further south, which shows better in Halpa.