"Sun Detail Stack" 10-Dec-2022 ~11am
Calcium-II K image: Imaging Source DMK 33UX226 (gain 33%, exposure 1.4ms, gamma 184) + William Optics FLT98 @ native f/6.3 + Baader Planetarium Herschel Safety Wedge + Omega Optics 0.2nm Ca-K filter. Hydrogen-alpha image: Imaging Source DMK 33UX226 (gain 50%, exposure 3.6ms, gamma 271) + William Optics FLT98 @ native f/6.3 + SolarScope 50mm etalon & blocking filter. Note, prominences captured at different exposure and composited in after (gain 50%, exposure 8.3ms, gamma=35).
Captured from my backyard in central Ottawa. Transparency was average, seeing below average. Best 200 frames from 4000 were stacked using Autostakkert!3, sharpening with wavelets in Registax 6. Colour added in Photoshop.