August 16 2018 AR12718 3 bands 280mm scope.

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Valery
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August 16 2018 AR12718 3 bands 280mm scope.

Post by Valery » Sat Aug 18, 2018 5:08 pm

Hello to all,

Morning of the August 16 was calm and sunny - a good chance to image a new tiny AR12718 in CaK, UV 393nm and in H-a. My trusty C11 scope was equipped with the ARIES full size (295mm) DERF energy rejection filter and three narrow band filters - CaK (393nm, 2,2A FWHM), 393nm bandpass ( 20nm) filter and H-a 656nm (0,2A FWHM). Basler 1920-155 camera.

Seeing was OK.

Thanks for looking and comments.


Valery
Attachments
AR12718-2018-08-16-UT05h-46m-280mm-ARIES-DERF-PST-CaK-Basler-1920.jpg
AR12718-2018-08-16-UT05h-46m-280mm-ARIES-DERF-PST-CaK-Basler-1920.jpg (488.33 KiB) Viewed 357 times
AR12718-2018-08-16-UT06h-04m-280mm-ARIES-DERF-393nm-Basler-1920.jpg
AR12718-2018-08-16-UT06h-04m-280mm-ARIES-DERF-393nm-Basler-1920.jpg (497.6 KiB) Viewed 357 times
AR12718-2018-08-16-UT06h-22m-280mm-ARIES-DERF-656nm-Basler-1920.jpg
AR12718-2018-08-16-UT06h-22m-280mm-ARIES-DERF-656nm-Basler-1920.jpg (494 KiB) Viewed 357 times
Last edited by Valery on Wed Aug 22, 2018 7:53 am, edited 2 times in total.
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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by PDB » Sat Aug 18, 2018 5:16 pm

Valery,

you are usually producing quality images, but these are exceptional. Seeing was ok maybe is an understatement?
The glow in the CAK is great, granulation: can it be done better and that 0.2A H-Alfa, where did you find that filter ...

Regards,

Paul

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by MalVeauX » Sat Aug 18, 2018 6:58 pm

Awesome resolution, seeing must have been killer!

Very best,

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by LTHB » Sat Aug 18, 2018 9:27 pm

Hi Valery,

great pictures! The CaK in particular is terrific - I haven't seen any CaK image taken with amateur equipment that comes closer to the DOT images in terms of detail and resolution!

Would you tell us what exposure time you used and how many frames you stacked?

Regards,

Frank

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by p_zetner » Sun Aug 19, 2018 4:45 am

Magnificent images, Valery!

Cheers, Peter.

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by marktownley » Sun Aug 19, 2018 8:12 am

Very good! I'm glad you got round to posting them.
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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by ffellah » Sun Aug 19, 2018 10:46 am

Well done, Valery.

Franco


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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by krakatoa1883 » Sun Aug 19, 2018 1:18 pm

Wow, the K image is really impressive, great resolution indeed.
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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by Montana » Mon Aug 20, 2018 7:17 am

Goodness grief!!! unbelievable CaK, are you sure you aren't at one of the major solar observatories Valery :)

:bow :bow :bow
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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by Valery » Tue Aug 21, 2018 2:23 pm

LTHB wrote:
Sat Aug 18, 2018 9:27 pm
Hi Valery,

great pictures! The CaK in particular is terrific - I haven't seen any CaK image taken with amateur equipment that comes closer to the DOT images in terms of detail and resolution!

Would you tell us what exposure time you used and how many frames you stacked?

Regards,

Frank
Hi Frank,

Thanks for looking at these images.

Exposure time was 6ms and 1500 stacked images.


Valery
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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by eroel » Tue Aug 21, 2018 2:59 pm

Valery:
The 2 first shots are superbly recorded and processed.
Best regards,
Eric.

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by Valery » Tue Aug 21, 2018 8:00 pm

eroel wrote:
Tue Aug 21, 2018 2:59 pm
Valery:
The 2 first shots are superbly recorded and processed.
Best regards,
Eric.
Thanks, Eric

Can't understand whats wrong with the H-a image???


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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by eroel » Tue Aug 21, 2018 9:37 pm

Valery:
Nothing wrong, the 3 images are stupendous, but as a personal taste I like the first 2 much more, for me the Ha is a bit oversharpened compared to the other two.
Best regards,
Eric.

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by Valery » Wed Aug 22, 2018 3:35 am

eroel wrote:
Tue Aug 21, 2018 9:37 pm
for me the Ha is a bit oversharpened compared to the other two.
Understand now. But I believe the image is not oversharpened - no noise (sand or dotty) and if I use a bit less of deconvolution, I start to loss the tiniest details which H-a image is full of. Not so with continuum image and in CaK core.

Have changed the H-a image for less sharpened one.


Valery
Last edited by Valery on Wed Aug 22, 2018 7:54 am, edited 1 time in total.
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Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by Carbon60 » Wed Aug 22, 2018 5:32 am

Exceptional images,Valery. Lots of wonderful details in all of them.

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by robert » Wed Aug 22, 2018 8:02 am

Second one is really unusual. Very interesting result. All have great resolution. Thanks
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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by Valery » Wed Aug 22, 2018 2:31 pm

Carbon60 wrote:
Wed Aug 22, 2018 5:32 am
Exceptional images,Valery. Lots of wonderful details in all of them.

Stu.
Thanks, Stu

Note that the seeing was just OK, nothing special. May be a bit better when I recorded the CaK.

With Solar Scintillation Monotor such results should be achieveable in average climates. Especially if an aperture is smaller.


Valery
Last edited by Valery on Thu Aug 23, 2018 3:15 am, edited 1 time in total.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by MapleRidge » Wed Aug 22, 2018 3:35 pm

Hi Valery...

These images are all very impressive...well done :bow

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by LTHB » Sun Aug 26, 2018 2:07 pm

Hi Valery,

thanks (somewhat belatedly - I was very busy last week) for the info!

I am also shooting CaK at 6ms (or a little less) exposure time, but I mostly stack around 200 frames. I've never used a stack of more than 1000 frames, but I recall that Emil Kraaikamp says somewhere on his website, that he prefers to stack many pictures and, as he puts it, push the stack a bit harder.

So this is something to explore for me: Vary the stack size. I'll probably try this in both directions to see what works best: More than 1000 frames, as in your terrific image, but I'll also try much smaller stacks, as Christian recommends - if I can find a way to get less noisy videos, maybe with a different camera.

Thanks again and regards,

Frank

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by Valery » Sun Aug 26, 2018 2:45 pm

LTHB wrote:
Sun Aug 26, 2018 2:07 pm

So this is something to explore for me: Vary the stack size. I'll probably try this in both directions to see what works best: More than 1000 frames, as in your terrific image, but I'll also try much smaller stacks, as Christian recommends - if I can find a way to get less noisy videos, maybe with a different camera.
Frank,

The CaK image in this thread is far far not the best in resolution and details among all I have obtained during last year. I still hope to overcome my laziness and finally post my best CaK pictures.
Last edited by Valery on Mon Aug 27, 2018 6:57 pm, edited 1 time in total.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: August 16 2018 AR12718 3 bands 280mm scope.

Post by LTHB » Mon Aug 27, 2018 6:55 pm

I hope so, too! I, for one, would very much like to see them!

Frank

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