Sun - Ha & White Light Full Disk - September 14, 2022

[Sumpy]

Earlier this week James noticed artifacts in my WL images that I hadn't really noticed before, and those artifacts turned out to be noise that had crept in during the ImPPG step. I've cut way back on the LR sharpening in ImPPG for the WL images today, and also cut LR sharpening back a bit on the Ha image as well.

I know that sharpening for solar work is a fine balance between the soft, fuzzy, non-distinct surface of the sun, and actually being able to see contrast and detail in the image. Any thoughts on if I am still over sharpening? I welcome any input or suggestions.

And dang take a look at that massive prominence!

Sun-ZWO-Lunt-Full-Disk-Ha-September-14-2022.jpg (1.94 MiB) Viewed 603 times

Sun-ZWO-Lunt-Full-Disk-Ha-Inverted-September-14-2022.jpg (1.94 MiB) Viewed 603 times

Sun-ZWO-Lunt-Full-Disk-Ha-Blackout-September-14-2022.jpg (376.66 KiB) Viewed 603 times

Sun-ZWO-Lunt-Full-Disk-Ha-Overlay-September-14-2022.jpg (2.46 MiB) Viewed 603 times

WITHOUT #58A GREEN FILTER:

Sun-ZWO-Stellarview-Full-Disk-WL-September-14-2022.jpg (962.09 KiB) Viewed 603 times

WITH #58A GREEN FILTER:

Sun-ZWO-Stellarview-Full-Disk-WL58A-September-14-2022.jpg (989.07 KiB) Viewed 603 times

[marktownley]

You get lots of clear skies in Greenville! Great disks Brian!

[mattwastell]

Hello Sumpy.
Great presentation - I really like the Ha & prom disc images.
Happy days.

[MAURITS]

Beautiful presentation Brian.

[Carbon60]

Excellent, Brian. Great images and presentation.

Stu.

[christian viladrich]

Hello Brian,
The Ha image is nicely processed !
Regarding the WL image, the image with the W58A is slightly better. Still, if you can, I would suggest to use a trichromic green filter (Astronomik, Baader CCD, ZWO, etc.). Indeed, the W58A transmits IR light, which is recorded by the camera, reducing the contrast and resolution of the image. You would have a better resolution with a trichromic green filter.

[ffellah]

A great set Brian

Franco

[rigel123]

Nice ones Brian!

[Sumpy]

Thanks so much for the kind words, all! Still trying to improve day by day.

The Ha image is nicely processed !
Regarding the WL image, the image with the W58A is slightly better. Still, if you can, I would suggest to use a trichromic green filter (Astronomik, Baader CCD, ZWO, etc.). Indeed, the W58A transmits IR light, which is recorded by the camera, reducing the contrast and resolution of the image. You would have a better resolution with a trichromic green filter.

Thanks Christian - I greatly appreciate your insight!

When you say trichromatic, do you mean like the Baader CMOS optimized green filter, or the Baader 500nm bandpass green filter? I assume the latter?

500nm Bandpass Green: https://agenaastro.com/baader-green-fil ... 58304.html

I've been searching for a solar continuum filter that is in stock with no luck, which led me to try the green filter I had on hand.

[Montana]

These are absolutely cracking images

Alexandra

[christian viladrich]

Thanks so much for the kind words, all! Still trying to improve day by day.

The Ha image is nicely processed !
Regarding the WL image, the image with the W58A is slightly better. Still, if you can, I would suggest to use a trichromic green filter (Astronomik, Baader CCD, ZWO, etc.). Indeed, the W58A transmits IR light, which is recorded by the camera, reducing the contrast and resolution of the image. You would have a better resolution with a trichromic green filter.

Thanks Christian - I greatly appreciate your insight!

When you say trichromatic, do you mean like the Baader CMOS optimized green filter, or the Baader 500nm bandpass green filter? I assume the latter?

500nm Bandpass Green: https://agenaastro.com/baader-green-fil ... 58304.html

I've been searching for a solar continuum filter that is in stock with no luck, which led me to try the green filter I had on hand.

I meant filters with a "square" transmission curve. These filters have a high peak transmission and cut most of the IR. For example :
Baader CMOS optimized :
https://www.baader-planetarium.com/en/b ... mized.html
ZWO :
https://astronomy-imaging-camera.com/pr ... ed-asi1600
Astronomik :
https://www.astronomik.com/en/fotografi ... rsatz.html

You just need the green filter, not the whole LRGB set.

The Baader continuum is a bit dark (because of its narrow bandpass), this is why I would rather recommend a green filter.

[Sumpy]

Got it - thank you again, Christian!

[arnedanielsen]

Great set of images, Brian! Love the different presentations!

Best regards,
Arne

[DeepSolar64]

Somehow I missed this one. Great job Brian. I especially love the blackout image!!

James

[Sumpy]

Thanks so much for the kind words, all!

[DeepSolar64]

Welcome. :-)