Sun FD in H-Alpha, CaK and Continuum March 8th 2024

[arnedanielsen]

Dear friends,

FD images of the Sun in H-Alpha, CaK and Continuum from March 8th 2024. Nice and sunny all day! :-)

Click on images to view them in full size on AstroBin.

FD image in H-Alpha using a Coronado 60mm/BF15 w/Beloptik ITF, stopped down to 50mm, Baader 35nm H-Alpha and ASI 178mm mounted on a SkyWatcher SolarQuest.







FD image in CaK using a FLO StellaMira 80mm ED f/10, stopped down to 60mm, Lunt CaK 1200 module and ASI 183mm camera mounted on a SkyWatcher SolarQuest.





FD image in Continuum using a FLO StellaMira 80mm ED f/10, Baader Cool-Ceramic Safety Herschel Prism Photographic 2", Baader ND OD 1.8, Baader 2" Continuum 7,5nm and ASI 183mm camera mounted on a SkyWatcher SolarQuest.

[psuaero]

Wow, amazing images. I love the mono and colorized full disc image. Even illumination and very contrast-y.

I can't say I'm familiar with all your equipment and would love to learn more. Is this double stacked? I have a Lunt 50 SS and ASI178MM and haven't been able to capture anywhere near this quality image. What does the 35nm Baader filter provide in your setup? Where does it go in the optical train? Is that like a small step (much more affordable) toward a double stack?

John

[rsfoto]

Hi Arne,

Beautiful images as usual

[rigel123]

Great disks Arne! You are getting amazing contrast with the SS scope.

[cybermayberry]

Nice session

[marktownley]

Nice disks thanks Arne! Looks like you have high pressure over you for a while now.

[christian viladrich]

Very nice images Arne !

[arnedanielsen]

Thank you very much John, Rainer, Warren, Rich, Mark, Christian!

John: It's a single stack. The 35nm Ha is mainly used as an extra protection layer for the ITF filter, but I also feel it's increases the contrast and especially makes the surrounding sky darker. So I think it must be filtering out some parasitic light.

Mark: Back to grey now :-(

[MAURITS]

Lovely image Arne.

[arnedanielsen]

Many thanks, Maurits!

[arnedanielsen]

Here's a close-up image from the same session done with a TS-Optics 102mm f/11 ED, Altair Astro 115mm TRIBAND H-Alpha D-ERF, Baader 35nm H-Alpha, Baader SunDancer II 3x Telecentric System TZ-3S, DayStar Quantum 0,4å PE and Player One Apollo-M Max.

Stacking in AS4! and sharpening in ImPPG as usual, but this time I tested the Solar Toolbox in PixInsight for contrast stretching.

As always, you can click on image to view in full size on AstroBin.

[marktownley]

Nice addition!

[arnedanielsen]

Thanks Mark!