Sun in Ha and CaK 18th Feb '21

[Carbon60]

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)

20210218_CaK_FD_mono by Stuart Green, on Flickr

20210218_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

20210218_Ha_FD_CorBF_colour by Stuart Green, on Flickr

20210218_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.

20210218_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.

[DeepSolar64]

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

James

[Stardust5858]

Great Stu, good quick captures. Thanks for sharing.

[marktownley]

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

[EGRAY_OBSERVATORY]

Excellent images Stu showing all the details so well

Thanks for sharing
Terry

[Carbon60]

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.

[ffellah]

Good looking disks, Stu, thank you.

Franco

[Carbon60]

Thanks, Franco.
Much appreciated.

Stu.

[Montana]

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

Alexandra