Sol in Ha 14 May 2019 - AR2741 and prom

[Hughsie]

Attached is an inverted image of the Sun taken in Ha on 14 May 2019.

The final output is comprised of two images, one capturing the surface detail and the second the prominence. Both were taken with my William Optics Z61, Daystar Quark Chromosphere, ZWO ASI174mm and captured using SharpCap.

Surface image - Exposure time 10ms, Gain 40. 3,000 framed AVI.

Prominence image - Exposure time 10ms, Gain c290 (memory bad!). 3,000 frames AVI.

SharpCap settings then restored to the surface setting. Telescope was then centred on the Sun and defocussed.  Further 3,000 frames of an AVI were taken to create a stacked flat frame.

All three AVIs were stacked in AutoStakkert2 with the surface and prom image calibrated with the stacked flat frames. Best 60% taken.

Levels adjustments undertaken in Photoshop along with high pass sharpening. Two images brought together as separate layers and combined in difference mode. Some contrast adjustments made to surface image as well.

Many thanks.

John