06.16.21 Sun in Lunt50

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Ivan
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06.16.21 Sun in Lunt50

Post by Ivan »

Hello everyone,

Full disc June 16, mosaic of 6 fragments.
I would be glad to hear your assessments and recommendations.

Ivan
Attachments
FD color.jpg
FD color.jpg (1 MiB) Viewed 710 times
FD gray.jpg
FD gray.jpg (698.27 KiB) Viewed 710 times
FD inv proms.jpg
FD inv proms.jpg (784.82 KiB) Viewed 710 times
FD inv.jpg
FD inv.jpg (842.74 KiB) Viewed 710 times


EGRAY_OBSERVATORY
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Re: 06.16.21 Sun in Lunt50

Post by EGRAY_OBSERVATORY »

These are excellent images Ivan - showing lots of detail.

Thanks for sharing
Terry


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

EGRAY_OBSERVATORY wrote: Wed Jun 16, 2021 10:05 pm These are excellent images Ivan - showing lots of detail.

Thanks for sharing
Terry
Thank you Terry, good to hear from you.

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by dhkaiser »

Looks real good to me Ivan.


Dan
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Re: 06.16.21 Sun in Lunt50

Post by DeepSolar64 »

Ivan,
That's better than any Ha disk I have ever done. Your disc is evenly illuminated, good contrast and sharpness is just right. All details are shown. The plage of AR12833 just " pops " ! I love the first colored Ha FD!!!

BIG thumbs up!!

James


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

dhkaiser wrote: Wed Jun 16, 2021 10:42 pm Looks real good to me Ivan.
Thanks, Dan

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

DeepSolar64 wrote: Thu Jun 17, 2021 4:45 am Ivan,
That's better than any Ha disk I have ever done. Your disc is evenly illuminated, good contrast and sharpness is just right. All details are shown. The plage of AR12833 just " pops " ! I love the first colored Ha FD!!!

BIG thumbs up!!

James
Thank you James, I'm very glad you liked it.

Sometimes I can do it evenly, but more often I don’t. I haven't figured out all the reasons yet. I think it depends on seeing, little visible clouds, etalon setting. I am sure there are many more reasons.

If it helps, then it was for this disc that I additionally filmed the central fragment. He became the basis of the mosaic. Perhaps this is why the background has become more uniform.

The mosaic I collected in Fotomerge is a function in Photoshop. Each piece of the finished mosaic can be lightened or darkened using "levels" or "curves". But I'm rarely satisfied with the result. Therefore, more often I use the "darken" or "lighten" tools with the lowest intensity settings. You can also use luma masks.

Exposure was 1 ms, shot at noon in strong winds. I shot 1000 frames, of which I added 15%.

For the experiment, I removed 3 discs with shutter speeds of 2, 3 and 1 ms, but I had not yet had time to process them.

Contrast and detail made in ImPPG. Then I darkened it in Photoshop, but it's a matter of taste.

The article that Alaxandra wrote helped me a lot: https://solarnutcase.livejournal.com/18572.html

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by Montana »

This is excellent Ivan :bow :hamster:

Do you use flats for each part of the mosaic? To get an even disc I take all the frames, then go to the centre of the Sun, cover the front with opaque plastic and take a flat. I then use this flat with all the pieces of mosaic, then put them together in Photomerge. I find this helps with patchiness (most of the time).

Alexandra


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

Montana wrote: Thu Jun 17, 2021 10:52 am This is excellent Ivan :bow :hamster:

Do you use flats for each part of the mosaic? To get an even disc I take all the frames, then go to the centre of the Sun, cover the front with opaque plastic and take a flat. I then use this flat with all the pieces of mosaic, then put them together in Photomerge. I find this helps with patchiness (most of the time).

Alexandra

Thank you, Alexandra

I forgot to add that at the beginning or end of the session, I make sure to shoot flats frames and add master flat in AS, and then calibrate all the fragments of the mosaic with it.

This helps to make the result uniform in brightness, but, unfortunately, not always. In my case, this is 3 or 4 successful panoramas out of 10. In other cases. I use the methods I wrote about above.

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by DeepSolar64 »

I have used Photomerge in PhotoShop years ago. I used it to do panos by putting pictures together. I wonder if GIMP has a similar tool?

James


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

DeepSolar64 wrote: Thu Jun 17, 2021 1:36 pm I have used Photomerge in PhotoShop years ago. I used it to do panos by putting pictures together. I wonder if GIMP has a similar tool?

James
I don't know James. I heard that a panorama can be assembled in the Image Composite Editor (ICE). Someone is using this program here in the forum.

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by DeepSolar64 »

Ivan wrote: Thu Jun 17, 2021 5:50 pm
DeepSolar64 wrote: Thu Jun 17, 2021 1:36 pm I have used Photomerge in PhotoShop years ago. I used it to do panos by putting pictures together. I wonder if GIMP has a similar tool?

James
I don't know James. I heard that a panorama can be assembled in the Image Composite Editor (ICE). Someone is using this program here in the forum.

Ivan

My guess would be Rainer.


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Losmandy AZ8 Alt/Az Mount
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Re: 06.16.21 Sun in Lunt50

Post by eroel »

Ivan:
Very good mosaics, I also use Photomerge or Autostitch.
Best regards.
Eric.


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

eroel wrote: Thu Jun 17, 2021 6:39 pm Ivan:
Very good mosaics, I also use Photomerge or Autostitch.
Best regards.
Eric.
Thanks a lot Eric.
I'm glad I liked the mosaic.

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by davidem27 »

Really natural processing.
I love the color image.
What is the used camera?


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

davidem27 wrote: Fri Jun 18, 2021 7:19 pm Really natural processing.
I love the color image.
What is the used camera?
Hello,

I'm glad you liked it. I used the old qhy img0s camera. This is a monochrome ccd with non-adjustable cooling. The Lunt50 lacks focuser travel, so I have to use a 2x Barlow lens.
The color is synthetic, I'm still at the stage of finding the RGB balance.

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by davidem27 »

Ivan wrote: Fri Jun 18, 2021 8:46 pmThe Lunt50 lacks focuser travel, so I have to use a 2x Barlow lens.
I am experiencing the same identical issue.
Neither with the attached barlow I can reach focus.
So strange.


White light: Skywatcher 120 ED and Borg 76 ED with Baader Herschel Wedge and filters
H-alpha: Lunt LS50T Ha BF600, 120 ED modified by Lunt etalon. Thousand Oaks 0.9 Å Prominance filter
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Re: 06.16.21 Sun in Lunt50

Post by p_zetner »

Beautiful disks, Ivan.
You have done a superb job of creating even illumination in these mosaics.
Cheers.
Peter


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

davidem27 wrote: Fri Jun 18, 2021 10:47 pm
Ivan wrote: Fri Jun 18, 2021 8:46 pmThe Lunt50 lacks focuser travel, so I have to use a 2x Barlow lens.
I am experiencing the same identical issue.
Neither with the attached barlow I can reach focus.
So strange.
Are you missing a focuser inward or outward?

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

p_zetner wrote: Fri Jun 18, 2021 11:18 pm Beautiful disks, Ivan.
You have done a superb job of creating even illumination in these mosaics.
Cheers.
Peter
Thanks, Peter.

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by davidem27 »

Ivan wrote: Sat Jun 19, 2021 12:23 amAre you missing a focuser inward or outward?
If I try to use camera without barlow, I have minimal inward issues. This mean that, to reach focus, I have to change diagonal eyepiece holder with a shorter one than the original.
If I put a barlow in the optical train, I can never reach focus.

I do not have the OEM helical focuser but a 40mm non-rotating helical focuser, sturdier and smoother than the original one.

My thoughts goes to future mods of Frankenscope using its etalon module. May I have critical focus issues? Perhaps this is an argument for a different topic...


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Calcium II K: Lunt B1200

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Re: 06.16.21 Sun in Lunt50

Post by Petrus »

Fantastic images, Ivan!


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Re: 06.16.21 Sun in Lunt50

Post by ffellah »

Fabulous full disk images, Ivan

Franco


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

ffellah wrote: Mon Jun 21, 2021 10:15 am Fabulous full disk images, Ivan

Franco
Thank you Franco

Ivan


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Re: 06.16.21 Sun in Lunt50

Post by Ivan »

davidem27 wrote: Mon Jun 21, 2021 7:51 am
Ivan wrote: Sat Jun 19, 2021 12:23 amAre you missing a focuser inward or outward?
If I try to use camera without barlow, I have minimal inward issues. This mean that, to reach focus, I have to change diagonal eyepiece holder with a shorter one than the original.
If I put a barlow in the optical train, I can never reach focus.

I do not have the OEM helical focuser but a 40mm non-rotating helical focuser, sturdier and smoother than the original one.

My thoughts goes to future mods of Frankenscope using its etalon module. May I have critical focus issues? Perhaps this is an argument for a different topic...
Hi, I read your site, it was interesting.

Regarding focusing, unfortunately I cannot help you. I read about this problem, one solution is to replace the eyepiece holder (on the blocking filter) with a shorter one. Here's an example: https://stargazerslounge.com/topic/2510 ... d-sort-of/

But before that, I recommend just unscrewing it and bringing the camera up to make sure there is focus. By modifications, there is a whole branch here: viewforum.php?f=9

I recommend reading this material, there is just about Lunt50: viewtopic.php?f=9&t=19238 Ivan


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Re: 06.16.21 Sun in Lunt50

Post by davidem27 »

Thank so much for the appreciation and for your answer, Ivan.

I'm browsing these topics so hard and I'm trying to figure out the best solution for me.


White light: Skywatcher 120 ED and Borg 76 ED with Baader Herschel Wedge and filters
H-alpha: Lunt LS50T Ha BF600, 120 ED modified by Lunt etalon. Thousand Oaks 0.9 Å Prominance filter
Calcium II K: Lunt B1200

www.volpetta.com

We are curious. We need equipment, we need seeing, we need time
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