Process my old CaK please

[TareqPhoto]

Hi,

Congrats all who captured the Eclipse, it is definitely the best unique astro event in the human history.

Can you please process my old image i was taking last year so i want to see how good it is? I uploaded the stacked image out from the camera, it is same setup i used for the image i won here before, my processing is not that i feel i can trust even after i won, if you can process and show me then i will know how it should be and also i know that my scope is good enough and no need to upgrade/change.

2023-12-03-1106_6-U-G-Jup_lapl5_ap30.png (3.41 MiB) Viewed 621 times

[Carbon60]

Hi Tareq,

2023-12-03-1106_6-U-G-Jup_lapl5_ap30_SG_Mono.png (684.23 KiB) Viewed 586 times

2023_12_03_1106_6_U_G_Jup_lapl5_ap30_SG_colour.png (1.5 MiB) Viewed 586 times

Your downloaded image is under sampled. I had to upscale to smooth out the blockiness to try to improve the image before sharpening. Consequently, details are not well resolved as a result of your under sampling, but there is quite some improvement from the starting image.

Given the original image is quite small in the frame, there is certainly room to use a Barlow to magnify the view.

Stu.

[rigel123]

I'm sure I can't improve over what Stu has shown here!

[marktownley]

Exactly what Stu said and has done

[rsfoto]

Hi Tareq,

Just a 1:1 crop, a simple Histogram stretch and a tiny bit of Unsharp Mask. Nothing else as I still do not understand Over- or Under sampling

Important for you is to focus near perfection.

2023-12-03-1106_6-U-G-Jup_lapl5_ap30.jpg (166.16 KiB) Viewed 541 times

[TareqPhoto]

Hi Tareq,

2023-12-03-1106_6-U-G-Jup_lapl5_ap30_SG_Mono.png

2023_12_03_1106_6_U_G_Jup_lapl5_ap30_SG_colour.png

Your downloaded image is under sampled. I had to upscale to smooth out the blockiness to try to improve the image before sharpening. Consequently, details are not well resolved as a result of your under sampling, but there is quite some improvement from the starting image.

Given the original image is quite small in the frame, there is certainly room to use a Barlow to magnify the view.

Stu.

Hi Stu,

Thank you very much!

So, what caused that under sampling? The camera pixel didn't match the scope focal ratio?

That is why i stopped, so i have to learn the mistakes from my previous ones first, in fact i didn't use the Barlow so to have the full disk, i used the Barlow for Quark Ha and i couldn't get full disk, so i left CaK imaging without Barlow, but i stopped the scope from F5 to F10 at least.

Also, i only did focus manually, i don't know if that also affected the final result, i will think later about adding autofocuser for spot on focusing.

[TareqPhoto]

I'm sure I can't improve over what Stu has shown here!

Hi Warren,

Yes, he answered me perfectly and i understand, i will keep that in mind.

[TareqPhoto]

Exactly what Stu said and has done

No problem, i want to learn, and nowhere better than here to learn about solar imaging.

[TareqPhoto]

Hi Tareq,

Just a 1:1 crop, a simple Histogram stretch and a tiny bit of Unsharp Mask. Nothing else as I still do not understand Over- or Under sampling

Important for you is to focus near perfection.


2023-12-03-1106_6-U-G-Jup_lapl5_ap30.jpg

Hi Rainer,

Actually i have another image i did with crop during imaging,i will upload that one sooner or later, i just uploaded this first, to see how it will turn out, focus isn't good for sure, but that is all what i could manage manually, and i don't know if i should hold on this scope or better move to another one better and add autofocus to it.

Thank you very much for playing with my result

[cybermayberry]

viewtopic.php?t=32595

This post may help to clear things up with regards to sampling

[cybermayberry]

test_folder_1_lapl2_ap96_D.png (616.07 KiB) Viewed 438 times

I decided to give this a go as well.
The data is very under-sampled so no fine details.

I decided to start as Stu did by increasing the images size to begin with, for the reason he gave.
I duplicated the original image and forced a drizzle interrogation on original and duplicated image.
After that I did a slight curve adjustment and a minor deconvulsion on the image in ImPPG
The image was then brought into photoshop for additional curves, dehazing, adjustments to texture and clarity, and minor noise reduction and sharpining. After that a some edge sharping was done via high pass filtration (this will increase contrast and perception of sharpness with out increasing nose levels), followed by another slight curves adjustment with a reduction to opacity to that layer, then a small layer adjustment layer again with a reduction to opacity to that layer. Finally a round topaz denoise, and resampling the image back to the original size.

Rich

[TareqPhoto]

viewtopic.php?t=32595

This post may help to clear things up with regards to sampling

Cool, thank you very much!

[TareqPhoto]

test_folder_1_lapl2_ap96_D.png

I decided to give this a go as well.
The data is very under-sampled so no fine details.

I decided to start as Stu did by increasing the images size to begin with, for the reason he gave.
I duplicated the original image and forced a drizzle interrogation on original and duplicated image.
After that I did a slight curve adjustment and a minor deconvulsion on the image in ImPPG
The image was then brought into photoshop for additional curves, dehazing, adjustments to texture and clarity, and minor noise reduction and sharpining. After that a some edge sharping was done via high pass filtration (this will increase contrast and perception of sharpness with out increasing nose levels), followed by another slight curves adjustment with a reduction to opacity to that layer, then a small layer adjustment layer again with a reduction to opacity to that layer. Finally a round topaz denoise, and resampling the image back to the original size.

Rich

Thank you Richard for playing with this file, i so appreciate it.

So what is the best way if i want to have a full disk using this camera ASI174 and Lunt CaK without doing mosaic or using a reducer? If you know the way please let me know.

[TareqPhoto]

As i mentioned, here is another image file of the same time, but it is cropped with ROI, not sure if this is any better focus or details, if not then i better find a way for correct sampling then try again.

2023-12-03-1103_7-U-G-Jup_lapl3_ap29.png (1.58 MiB) Viewed 401 times

Here is a link to compressed one of the same above, just in case if uploading here isn't giving a good quality or compressed

https://drive.google.com/file/d/1psAKit ... drive_link

[TareqPhoto]

Also, what is the best way to make a perfect focus if i don't have an autofocuser or a motor for that? I mean how could i make a perfect focus manually, so even if i can make a right sampling then bad focusing will also ruin it.

[Rusted]

Can anybody play?

ca sun 130424.jpg (118.1 KiB) Viewed 390 times

PhotoFiltre 7: Gamma, contrast and sharpening. 10 seconds?

[TareqPhoto]

Can anybody play?


ca sun 130424.jpg

PhotoFiltre 7: Gamma, contrast and sharpening. 10 seconds?

Yes of course, i uploaded it for all to play if they are willing to.

Thank you very much, this is the best i like the most, i hope if you can colorize it too.

[Rusted]

As requested:

ca sun 130424 colour.jpg (118.22 KiB) Viewed 377 times

There is an increase in limb darkening.

[cybermayberry]

test_folder_1_lapl2_ap96_D.png

I decided to give this a go as well.
The data is very under-sampled so no fine details.

I decided to start as Stu did by increasing the images size to begin with, for the reason he gave.
I duplicated the original image and forced a drizzle interrogation on original and duplicated image.
After that I did a slight curve adjustment and a minor deconvulsion on the image in ImPPG
The image was then brought into photoshop for additional curves, dehazing, adjustments to texture and clarity, and minor noise reduction and sharpining. After that a some edge sharping was done via high pass filtration (this will increase contrast and perception of sharpness with out increasing nose levels), followed by another slight curves adjustment with a reduction to opacity to that layer, then a small layer adjustment layer again with a reduction to opacity to that layer. Finally a round topaz denoise, and resampling the image back to the original size.

Rich

Thank you Richard for playing with this file, i so appreciate it.

So what is the best way if i want to have a full disk using this camera ASI174 and Lunt CaK without doing mosaic or using a reducer? If you know the way please let me know.

You will need around f/35-f/37 to get critical sampling with that camera in that bandwidth, conversely if you used a ASI183 you would only need around f/15. (anyone correct me if my math is wrong here please!)
If you don't want to use a barlow to reach that, you can also mask down the aperture to achieve the proper f ratio.
Masking down aperture will effect the dawes limit, which is the trade off.

[Brian3114611]

First time processing Ca II K full disk, I used PixInsight.
_2023_12_03_1103_7_U_G_Jup_lapl3_ap29_AI2M2 by Brian Liu, 於 Flickr
Colored
Colored by Brian Liu, 於 Flickr

[TareqPhoto]

As requested:


ca sun 130424 colour.jpg

There is an increase in limb darkening.

Amazing, thank you very much!

So even if it is under sampled i still like the results, Lunt CaK is a fun and i am happy to get one at good price finally, it was a dream for me to get CaK, so i will try to find a way for like proper sampling and doing full dick or close ups regular if possible, all help here is so appreciate and i thank you all.

[TareqPhoto]

test_folder_1_lapl2_ap96_D.png

I decided to give this a go as well.
The data is very under-sampled so no fine details.

I decided to start as Stu did by increasing the images size to begin with, for the reason he gave.
I duplicated the original image and forced a drizzle interrogation on original and duplicated image.
After that I did a slight curve adjustment and a minor deconvulsion on the image in ImPPG
The image was then brought into photoshop for additional curves, dehazing, adjustments to texture and clarity, and minor noise reduction and sharpining. After that a some edge sharping was done via high pass filtration (this will increase contrast and perception of sharpness with out increasing nose levels), followed by another slight curves adjustment with a reduction to opacity to that layer, then a small layer adjustment layer again with a reduction to opacity to that layer. Finally a round topaz denoise, and resampling the image back to the original size.

Rich

Thank you Richard for playing with this file, i so appreciate it.

So what is the best way if i want to have a full disk using this camera ASI174 and Lunt CaK without doing mosaic or using a reducer? If you know the way please let me know.

You will need around f/35-f/37 to get critical sampling with that camera in that bandwidth, conversely if you used a ASI183 you would only need around f/15. (anyone correct me if my math is wrong here please!)
If you don't want to use a barlow to reach that, you can also mask down the aperture to achieve the proper f ratio.
Masking down aperture will effect the dawes limit, which is the trade off.

I thought this is only required for doing Ha but not WL or CaK, they just said apply F10 minimum for CaK no matter sampling, but it is about which camera also, it means i must use my other camera even it is larger sensor than planetary and that will achieve sampling better then.

For close ups i don't mind using Barlow so that won't be a problem, but for full disk, it means i should use something like 20-30mm aperture and use Barlow to bring it fo F12-F18 and still wide enough to make a full disk with 174 or even 432, but i bought 432 mainly for Ha.

So stopping down isn't a good idea or it is just one trade off to avoid?

[TareqPhoto]

First time processing Ca II K full disk, I used PixInsight.
_2023_12_03_1103_7_U_G_Jup_lapl3_ap29_AI2M2 by Brian Liu, 於 Flickr
Colored
Colored by Brian Liu, 於 Flickr

Great, thank you very much!

This is almost similar to the sharpened version of stacked from Autostakkert, i didn't upload the sharpened so people won't say it is too much oversharpened or over processed, so i uploaded the normal one, when i do planetary with moon or planets i always prefer the sharpened version actually.

[cybermayberry]

Thank you Richard for playing with this file, i so appreciate it.

So what is the best way if i want to have a full disk using this camera ASI174 and Lunt CaK without doing mosaic or using a reducer? If you know the way please let me know.

You will need around f/35-f/37 to get critical sampling with that camera in that bandwidth, conversely if you used a ASI183 you would only need around f/15. (anyone correct me if my math is wrong here please!)
If you don't want to use a barlow to reach that, you can also mask down the aperture to achieve the proper f ratio.
Masking down aperture will effect the dawes limit, which is the trade off.

I thought this is only required for doing Ha but not WL or CaK, they just said apply F10 minimum for CaK no matter sampling, but it is about which camera also, it means i must use my other camera even it is larger sensor than planetary and that will achieve sampling better then.

For close ups i don't mind using Barlow so that won't be a problem, but for full disk, it means i should use something like 20-30mm aperture and use Barlow to bring it fo F12-F18 and still wide enough to make a full disk with 174 or even 432, but i bought 432 mainly for Ha.

So stopping down isn't a good idea or it is just one trade off to avoid?

If I am wrong on this someone please correct me!

This is applicable to every wavelength.

Try not to look at it as camera specific but the physical size of the individual pixels which make up the sensor array. IE the 174 is 5.86um vs the 183 which is 2.4um. Look at 178 vs 183 same sensor same ability to resolve, but the 183 has larger FOV from a larger pixel array. Keep in mind the FPS you want as well
Scope aperture defines the ability to resolve details. Larger the opening more detail you can resolve (seeing permitted--seeing is everything). This is where masking down come in as a trade off. (theoretically)
A refactor can be wide field and fast, or longer focal length and slower all while having the same aperture.

If you know the field of view you want, you need to determine the critical sampling rate given your individual pixel size and your scopes (max) aperture to get as close as you can.


The sampling rate can obtained be either through use of a barlow, a reducer, masking aperture down, or a combination.

[TareqPhoto]

You will need around f/35-f/37 to get critical sampling with that camera in that bandwidth, conversely if you used a ASI183 you would only need around f/15. (anyone correct me if my math is wrong here please!)
If you don't want to use a barlow to reach that, you can also mask down the aperture to achieve the proper f ratio.
Masking down aperture will effect the dawes limit, which is the trade off.

I thought this is only required for doing Ha but not WL or CaK, they just said apply F10 minimum for CaK no matter sampling, but it is about which camera also, it means i must use my other camera even it is larger sensor than planetary and that will achieve sampling better then.

For close ups i don't mind using Barlow so that won't be a problem, but for full disk, it means i should use something like 20-30mm aperture and use Barlow to bring it fo F12-F18 and still wide enough to make a full disk with 174 or even 432, but i bought 432 mainly for Ha.

So stopping down isn't a good idea or it is just one trade off to avoid?

If I am wrong on this someone please correct me!

This is applicable to every wavelength.

Try not to look at it as camera specific but the physical size of the individual pixels which make up the sensor array. IE the 174 is 5.86um vs the 183 which is 2.4um. Look at 178 vs 183 same sensor same ability to resolve, but the 183 has larger FOV from a larger pixel array. Keep in mind the FPS you want as well
Scope aperture defines the ability to resolve details. Larger the opening more detail you can resolve (seeing permitted--seeing is everything). This is where masking down come in as a trade off. (theoretically)
A refactor can be wide field and fast, or longer focal length and slower all while having the same aperture.

If you know the field of view you want, you need to determine the critical sampling rate given your individual pixel size and your scopes (max) aperture to get as close as you can.


The sampling rate can obtained be either through use of a barlow, a reducer, masking aperture down, or a combination.

I am still doing research about that, and using a site for FOV and sampling calculations to see what is the best combination setup i can use, it will take time, i feel like i am not ready again and we are getting into summer soon, so i will do it so slow maybe, still focusing on DSO more and another hobby, but i will try next month at least to make at least one final setup for solar, either CaK setup or Ha by Quark setup, if none then i will force myself to buy Baader Wedge so i can do WL only easy enough with anything i have.