The Sun in H-alpha and Ca K-line light

An Opticstar PL-130M 1280 x 1024 monochrome CMOS camera was placed at the prime focus of a Solarmax ll 60 BF15, H-alpha scope and a Ca K-line PST scope. Two ND filters were stacked on the adapter for the H-alpha imaging. 6 min AVIs were captured at each wavelength of the full solar disk. The AVIs were stacked in Registax and the resulting images coloured Red for H-alpha and blue for Ca K-line:

H-alpha

Ca K-line

The two images were blended 50% each to show the structures revealed in both wavelengths. The image was coloured mauve

An animation of the three images shows them in turn

Anatomy of a sunspot in H-alpha light (AR1734)
A DMK21AS camera was used with the lens from a 2 x Barlow stacked with a 2.5 x Barlow. A 10,000 frame AVI was captured and stacked in Registax so that the minimum frame quality was 90%:

Steve Wainwright