April 27, 2021: Back in the saddle part-II, H-alpha

[michael.h.f.wilkinson]

Shot a 19-pane panorama with the Solar Spectrum 0.3 Å H-alpha filter, Baader TZ-4 4x telecentric lens, and ASI174MM behind the APM 80mm F/6 triplet (stopped down to 75mm) and Beloptik Tri-Band ERF filter. In hindsight, I should have not have used the full chip, and shot more panes, as the flats did not fully correct the shading problems over the full FOV, but AutoStitch did manage to make a decent panorama of the whole sun, although some blotchiness is still visible.

Grey scale

Pseudo-colour

Part inverted

Part inverted + pseudo-colour

I also made a more detailed mosaic around the major ARs

Grey scale

Pseudo-colour

Part inverted

Part inverted + pseudo-colour

 

Finally, I took a longer exposure image of the large prom in the north

It felt good to be back in the saddle again

[Kitsunegari]

#5 is the winner!

[vineyard]

Agree w @Kitsunegari - that detailed mosaic is lovely.

[Highburymark]

Agree - Solar Spectrum really impresses on surface close-ups - lovely detail