The Sun in Ca K-line light and White Light

Click on an image to get a closer view. 

A Seestar S50 was used to capture a 3 minute RAW AVI Through a Baader OD 5.0 solar filter and a Baader Ca K-line filter, controlling the brightness,exposure and gain so that the blue channel was not overexposed. The best 80% of the frames were debayered and stacked in Autostakkert!4 with 1.5 Drizzle. The blue channel was wavelet processed in waveSharp 2.0 and post processed in the Gimp 2.10.

Ca K-line light

A Seestar S50 was used to capture a 3 minute RAW AVI Through a Baader OD 5.0 solar filter, controlling the brightness in the software. The best 80% of the frames were debayered and stacked in Autostakkert!4 with 1.5 Drizzle. The image was wavelet processed in waveSharp 2.0 and post processed in the Gimp 2.10. 

White light

Steve Wainwright and Nicola Mackin