Sun in Ha and CaK 18th Feb '21

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Carbon60
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Sun in Ha and CaK 18th Feb '21

Post by Carbon60 » Thu Feb 18, 2021 5:15 pm

I wasn't expecting to see the Sun for at least a week according to the weather forecast yesterday, so it was a pleasant surprise this morning when after a conference call in my 'man cave' I emerged to see a beautiful blue sky. I knew it wouldn't last, so set up quickly and ran a couple of quick FD mosaics with the DS Lunt 60 fitted with a Coronado BF15 and Lunt B1200 and a FD mosaic in Ca II K.

Here are the results.

Ca II K first (Lunt 1800 module, Omega and Baader K-Line)

Image20210218_CaK_FD_mono by Stuart Green, on Flickr

Image20210218_CaK_FD_colour by Stuart Green, on Flickr

...and the Ha FDs. (OOPS Forgot to flip the images!)

Lunt/Coronado BF in colour and mono

Image20210218_Ha_FD_CorBF_colour by Stuart Green, on Flickr

Image20210218_Ha_FD_CorBF by Stuart Green, on Flickr

and the Lunt/Lunt BF
This was imaged and processed in exactly the same way as with the Coronado BF, EXCEPT that the image is much less bright with the Lunt BF, so I had to increase the gain to bring it to an acceptable brightness.

I'd say the Lunt BF image is less clear/defined than that taken with the Coronado BF and has lower contrast.

Image20210218_Ha_FD_LntBF by Stuart Green, on Flickr

Given more time I could have tried to optimise for both, but the clouds were rolling in so that was that.....

Thanks for looking.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/

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Re: Sun in Ha and CaK 18th Feb '21

Post by DeepSolar64 » Thu Feb 18, 2021 5:26 pm

They still look good Stu. I would be elated to do images like yours!

James


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Re: Sun in Ha and CaK 18th Feb '21

Post by Stardust5858 » Thu Feb 18, 2021 6:01 pm

Great Stu, good quick captures. Thanks for sharing.


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Re: Sun in Ha and CaK 18th Feb '21

Post by marktownley » Thu Feb 18, 2021 6:08 pm

Very nice Stu, the Lunt blocker seems quite washed out in comparison to the Coronado. Hope you get to test again soon :)


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Re: Sun in Ha and CaK 18th Feb '21

Post by EGRAY_OBSERVATORY » Thu Feb 18, 2021 11:20 pm

Excellent images Stu showing all the details so well

Thanks for sharing
Terry



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Re: Sun in Ha and CaK 18th Feb '21

Post by Carbon60 » Fri Feb 19, 2021 6:42 am

Many thanks, everyone.

My focus now is to tweak the tuning and exposure settings using the BF15 and re-learn how to get the best from the DS Lunt 60. Roll on better weather.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/

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Re: Sun in Ha and CaK 18th Feb '21

Post by ffellah » Fri Feb 19, 2021 11:28 am

Good looking disks, Stu, thank you.

Franco



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Re: Sun in Ha and CaK 18th Feb '21

Post by Carbon60 » Fri Feb 19, 2021 2:42 pm

Thanks, Franco.
Much appreciated.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/

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Re: Sun in Ha and CaK 18th Feb '21

Post by Montana » Fri Feb 19, 2021 3:46 pm

Great images Stuart, always nice to have some surprise sunshine :bow :hamster: I do prefer the Coronado blocking filter though

Alexandra



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