Ha sun on the 12th Jan LT early

[Maurice]

Hi

Attached is an image of the sun in Ha from my home made SHG.

Best 10 of 38 frames which were reconstructed with Doug Smith's SHG software and selected & stacked in Autostakkert3!

100mm f/9 Skywatcher refractor.
ASI183MM camera

Deconvolved in Astrosurface.

Compressed version attached here.

Better one here: https://flic.kr/p/2prRDyt

cheers
Maurice

[John W (John Wilkinson)]

Nice SHG image Maurice - lots of detail - almost 3D-ish.

Cheers,
John W

[Peter Ward]

As usual....Just superb contrast from your rig.

If I were to quibble, there are tiny "sawtooth" artifacts and the res is not quite
on par with larger etalon based systems.

But the contrast is sublime!

You'd need very deep pockets to get to that level with etalon optics.

[Saturnine (Jeff)]

Stunning, the contrast is impressive. Spectaheliography seems like the new ! way for high definition solar .

[Maurice]

Originally Posted by John W

Nice SHG image Maurice - lots of detail - almost 3D-ish.


Cheers,
John W

Thank you John.
Showing a little more activity than over the past week or so..

Originally Posted by Peter Ward

As usual....Just superb contrast from your rig.

If I were to quibble, there are tiny "sawtooth" artifacts and the res is not quite
on par with larger etalon based systems.

But the contrast is sublime!

You'd need very deep pockets to get to that level with etalon optics.

Thank you Peter.
The bane of using a SHG is that you are at the mercy of the local seeing, more so than with a full frame capture. No lucky imaging here..

It takes me about 10 seconds to scan across the sun at 322 FPS.
That's a lot of time for the sun to wobble about in the seeing.

If the frequency of the seeing distortion isn't accomodating, then each 'slice' of the sun has a slightly different width which shows up as the saw-tooth effect that you mentioned.

Originally Posted by Saturnine

Stunning, the contrast is impressive. Spectaheliography seems like the new ! way for high definition solar .

Thanks Jeff.
I think that the SHG is certainly up there for the contrast that you can get due to the crazy narrow bandwidth.

cheers
Maurice