Stunning view of a solar flare in the H-alpha line

[thesmiths]

I saw this gif posted on astrosurf.com and was most impressed by the "image" of a large solar flare on March 5 at around 12:36 (French local time?) by Guillaume.

http://www.astrosurf.com/uploads/monthl ... 19a744.gif

Taken with a Solex and SW72ED telescope. The full post is here: http://www.astrosurf.com/topic/160572-f ... -le-solex/

By the way, I can tell his SHG was adjusted very well because you can see both sharp horizontal lines (spectral lines -- note the one at the bottom) as well as some sharp vertical lines ("transversalium", typically caused by dust on the slit -- note the one on the left). I find the resolution is best when you get sharp lines both horizontally and vertically, as well as high contrast structure within the spectral line. In this regard, this gif is also a good illustration of what good focus means. And what a flare!

[Montana]

Thanks Douglas, fantastic animation and images

Alexandra

[marktownley]

That's an excellent full disk. Very nice setup too.