h-alpha, August 7th, 2020

this is the main message area for anything solar :)
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LTHB
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h-alpha, August 7th, 2020

Post by LTHB »

The last weeks have been too busy to do much solar, except for the occasional quick peek at the marvellous images shown here on SL, but yesterday I found a little time to spend in the sun and also a sky clear enough for another attempt to produce a decent mosaic.

Image

The seeing allowed zooming in a little, but no higher resolution:

Image

Full resolution here: https://live.staticflickr.com/65535/502 ... f05a_o.jpg https://live.staticflickr.com/65535/502 ... f7cf_o.jpg

Kind regards,

Frank


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Re: h-alpha, August 7th, 2020

Post by dhkaiser »

Very nice. what equipment are you using?


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Re: h-alpha, August 7th, 2020

Post by rsfoto »

Hi Frank,

Excellent images and an awesome even full disk illumination. Very well done


regards Rainer

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Re: h-alpha, August 7th, 2020

Post by p_zetner »

Excellent images, Frank
Beautifully done.
Cheers.
Peter


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Re: h-alpha, August 7th, 2020

Post by eroel »

Frank, a very good session.
Regards,
Eric.


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Re: h-alpha, August 7th, 2020

Post by marktownley »

Top shots Frank! I've been too busy also.


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Re: h-alpha, August 7th, 2020

Post by LTHB »

Thanks folks!

Dan, I use a Tak Sky-90 with a double-stacked old (pre-Meade) SM90, the camera is an ASI290.

Rainer, the mosaic looks fairly even now, but unfortunately the etalons are not that even: I used a flat, and even after that the field gets darker towards the upper edge. I covered that up by using three panes for the mosaic (although two would suffice for the sun's surface), so that the upper ends of the two lower panes are hidden by the next pane, and the upper end of the upper pane is black anyway, so it doesn't show there.


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Re: h-alpha, August 7th, 2020

Post by JochenM »

Nice work there, Frank.


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Re: h-alpha, August 7th, 2020

Post by Montana »

Very, very nice details when viewed at full size, superb work :bow :hamster:

Alexandra


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