Feb, 20 2021 - Sun in three lights

[Fabio_Imm]

Hello,
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:

wl__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

Ha__2021-02-20_T1_stitch by Fabio Immovilli, su Flickr

Cak__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.

Cak 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

Camera:
Basler acA1920-155um

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


Cheers

Fabio

[marktownley]

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.

[rsfoto]

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.

[Montana]

I love the WL, what a great shot 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.

Alexandra

[EGRAY_OBSERVATORY]

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
Terry

[DeepSolar64]

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

[Stardust5858]

Lovely captures Fabio, thanks for sharing.