Feb, 20 2021 - Sun in three lights

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Feb, 20 2021 - Sun in three lights

Post by Fabio_Imm » Sat Feb 20, 2021 2:11 pm

Pleasant imaging session: today the transparency wasn't exceptional, but the air was really still.

Had a look at all the wavelenghts, starting with white light of the emerging AR:

Imagewl__2021-02-20_T1 by Fabio Immovilli, su Flickr

Then tried a couple mosaics in Ha and Ca-K: Microsoft ICE is really intuitive to use

ImageHa__2021-02-20_T1_stitch by Fabio Immovilli, su Flickr

ImageCak__2021-02-20_T1_stitch by Fabio Immovilli, su Flickr

I also experimented capturing the prominences in Ca-K, however the glow and ghost images (due to reflections ?) are really annoying. I am using a stock Lunt Ca-K module: all suggestions are welcome.

ImageCak prom__2021-02-20_T1 by Fabio Immovilli, su Flickr

Tecnhincal data

Ca-k setup:
C80ED + Lunt Ca-k module 1800

WL photographic setup:
C80ED + 2" UV/IR cut + 2" Baader solar continuum (on 80mm extension tubes) + ND3 filter & 2x barlow on camera nose

H-alpha setup
Daystar Solar Scout SS60ds

Basler acA1920-155um

Genika + Autostakkert + Registax 6 + Microsoft ICE for image stitching



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Re: Feb, 20 2021 - Sun in three lights

Post by marktownley » Sat Feb 20, 2021 3:11 pm

Thanks for these Fabio! They look great. Pouring with rain here today so nice to see. In terms of CaK you can stop the scope down to 60mm and will improve things.

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Re: Feb, 20 2021 - Sun in three lights

Post by rsfoto » Sat Feb 20, 2021 4:11 pm

Hi Fabio,

Excellent images and your white light from today confirms the two pores ¿ mini spots ? I saw yesterday while trying to ficus White Light but had back luck in doing so. Now there seem to be a few more.

regards Rainer

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Re: Feb, 20 2021 - Sun in three lights

Post by Montana » Sat Feb 20, 2021 4:57 pm

I love the WL, what a great shot :bow :hamster: I think I remember Eric saying that you need to lower the gamma and raise the gain for the CaK proms which is exactly the opposite to Halpha. I've never tried it but it might be worth trying.


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Re: Feb, 20 2021 - Sun in three lights

Post by EGRAY_OBSERVATORY » Sat Feb 20, 2021 10:07 pm

Super captures Fabio and those spots have particularly shown-up so well. In fact a closer look at AR2803 shows that three-smaller spots to the north
are possibly forming and the main two may well have bridges in them..

Thanks vm for sharing

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Re: Feb, 20 2021 - Sun in three lights

Post by DeepSolar64 » Sun Feb 21, 2021 12:23 am

Very nice Fabio. They all look great. The first white light one shows more tiny pores than I can see on the SDO images!!

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Re: Feb, 20 2021 - Sun in three lights

Post by Stardust5858 » Sun Feb 21, 2021 12:50 am

Lovely captures Fabio, thanks for sharing.

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