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Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE added!

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Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE added!

Post by Valery » Sat Apr 30, 2016 5:44 pm

Hi all,

An alternative view of the famous AR12529 through a 280mm aperture equipped with
ARIES' 295mm D-ERF, <0,25A etalon and ASI174MM camera.

My inspiration was the image taken with 1,6m telescope of Big Bear Solar Observatory (BBSO)
and with further contrast and colorizing by Alan Freedman (below image) taken from here:
http://apod.nasa.gov/apod/ap150217.html

Original APOD image is from here:
http://www.bbso.njit.edu/nst_gallery.html
http://www.bbso.njit.edu/gallery/NST_VI ... 141002.png


The images are double clickable for a full resolution.


Thanks for looking.


Valery
Attachments
04 12 2016 UT 10h 42m 280mm + ARIES 295mm D-ERF AR12529 INV.png
BBSO 1,6m H-a  Alan Freedman.jpg
Last edited by Valery on Sun May 01, 2016 10:21 am, edited 4 times 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.

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Re: Fibrils Flower on the Sun. 280mm aperture represents.

Post by Carbon60 » Sat Apr 30, 2016 6:38 pm

My goodness, Valery, this is stunning!

Stu.
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Re: Fibrils Flower on the Sun. 280mm aperture represents.

Post by Sungazer » Sat Apr 30, 2016 7:27 pm

Unbelievable definition, very well done. Kind regards,John. :bow

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Re: Fibrils Flower on the Sun. 280mm aperture represents.

Post by Derek Klepp » Sat Apr 30, 2016 7:29 pm

A work of Art.

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Re: Fibrils Flower on the Sun. 280mm aperture represents.

Post by GreatAttractor » Sat Apr 30, 2016 11:37 pm

Killer shot, Valery!
My software:
Stackistry — an open-source cross-platform image stacker
ImPPG — stack post-processing and animation alignment
My images

SW Mak-Cass 127, ATM Hα scope (D=90 mm, LS50 etalon), Lunt LS50THa, ATM SSM, ATM Newt 300/1500 mm, PGR Chameleon 3 mono (ICX445)

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Re: Fibrils Flower on the Sun. 280mm aperture represents.

Post by eroel » Sat Apr 30, 2016 11:47 pm

Valery:
Superb resolution.
Best regards,
Eric.

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Re: Fibrils Flower on the Sun. 280mm aperture represents.

Post by marktownley » Sun May 01, 2016 8:43 am

Wow! That is something else! Great result Valery!
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by Valery » Sun May 01, 2016 10:24 am

See and read the starting post. New image and explanation have been added.


Valery
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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by gabrieli » Sun May 01, 2016 10:38 am

Hi Valery

I lost my breath when I looked at the first image. Are you sure you don't live on some high mountaintop?

Lou

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by marktownley » Sun May 01, 2016 11:39 am

Interesting to compare! I do like the colour scheme!
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by eroel » Sun May 01, 2016 3:12 pm

Valery:
Up to par image with a professional one.
Superb result.
Receive a big hug,
Eric.

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by mbucky » Sun May 01, 2016 4:55 pm

absolutely stunning!! incredible details
Michael Buxton

Ocean Beach, California

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by KMH » Sun May 01, 2016 5:19 pm

Valery,

Absolutely stunning indeed! I have a C11 but doubt our seeing is ever good enough to do anything like that.

Kevin

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by Valery » Sun May 01, 2016 6:29 pm

KMH wrote:Valery,

Absolutely stunning indeed! I have a C11 but doubt our seeing is ever good enough to do anything like that.

Kevin

Kevin,
I am living at absolutely average place in the 400K city at 41m above sea level.

Here is what the C11 is capable of at average seeing vs 150mm telescope:
http://solarchat.natca.net/viewtopic.php?f=4&t=19539

See how much better the resolution with a C11. No comparison at all.
I can say, that even one single frame selected under good seeing shows
better resolution and in general more details than 9" refractors.
Aperture rules and nothing can substitute it.

Even at average seeing your can image and then make a scale about 30% smaller and still be
better than 8" refractor at best seeing. How often can anyone meet a best seeing? Very seldom.
So, there is easier way - to image with 11" aperture, record many frames, select 300 of best ones,
process and then make scale smaller and you get images at best of 8".


Valery
"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: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by Montana » Sun May 01, 2016 6:33 pm

It has to be good if it is in pink :girl:

My jaw dropped and I was in heaven :bow :bow :bow

Alexandra

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by michael.h.f.wilkinson » Sun May 01, 2016 8:45 pm

Amazing results!
Solar kit: GP-C8 with Thousand Oaks Solar filter, APM 80mm F/6, Lunt Herschel Wedge, Solar Spectrum 0.3Å H-alpha filter, Beloptic Tri-Band ERF (80mm free aperture), Thousand Oaks 90mm ERF, Coronado SolarMax II 60mm with Double Stack Unit. Lunt straight B1800 Ca-K module.

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by Carbon60 » Mon May 02, 2016 6:55 am

Hi Valery,

I hope you don't mind me saying, but I believe you can eliminate a little more noise from your wonderful image.

Here's a magnified view of before and after.
Comparison.png
The one on the left is the original and on the right a noise reduced version. The overall effect on the full image is subtle, but worth doing if there is a gain to be had, given the lengths you've gone to in order to capture the image in the first place.

You are certainly making a good case for large aperture solar imaging!

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by mdwmark » Mon May 02, 2016 7:58 am

HI Valery,
Question: why is the center of the image sharp, but everything else is so soft and out of focus.
I would think the whole image should look the same as the center.
Mark W.

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by mdwmark » Mon May 02, 2016 8:06 am

Valery,
I was looking at the second image , I see that was not yours.
But yours still soften outside the center.
Any idea why?
Mark W.

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by yltansg » Mon May 02, 2016 10:22 am

Hi Valery,

Wow!!!

Alfred

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by Valery » Mon May 02, 2016 2:07 pm

mdwmark wrote:Valery,
I was looking at the second image , I see that was not yours.
But yours still soften outside the center.
Any idea why?
Mark W.
Good question. Thanks for your note.

The relay optics was designed for a 40mm F/10 achromat and here it was used with 280mm F/10 SCT.
So, at least the filed curvature is overcorrected. Then coma of the SCT was not corrected. Field astigmatism
also plays it's game and I don't know how it does.
Optics may be not 100% collimated and 100% squared to the optical axis.
Also, if you will look with more attention, you will see that small sharp features are sharp even near corners.
But large filaments are not sharp by their nature (more or less diffuse features) and they are FAST MOVING features
of the solar chromosphere. To gazer as many as possible good frames under less than ideal seeing I need to have
up to 60 seconds of movies duration. This is too long time for imaging of these features at such a scale.
I need better seeing and use fastest possible camera and shortest possible movies durations. All factors pay
against imager. All. Without exceptions. The question is to find an optimal balance.

I always kept in mind to design a special optics and replace the original in this train.
What kept me to not do it yet is that I still didn't decide which etalon I will use with my
C11 and C14. I have several choices in mind:

1. To use this selected PST etalon (in my estimation it has <0,3A bandwidth) with a new collimating - refocusing optics.
2. To use this selected etalon in junction with a specifically designed telecentric system. But this is not a priority because it will
widen the bandwidth.
3. To use Quark and replace it's native telecentric with better one. I already tested such a configuration with a good results.
4. To use a selected 35mm air-spaced etalon which is even narrower than this PST etalon. And to build a pressure tuning for it.
5. May be I will find another good etalon.
6. May be you, Mark, will be so kind and make for me <0,2A solid spaced etalon with excellent evenness? Can you do upon
custom order?

Once I deceide which way I will go, I will design and make the optics which will correct all possible aberrations (possible for
correction) and maximize the performance across entire field (limited, of course).

Finally, I noted that all stacking software stacks frames and they lined them up using a small rectangle in the center where we
normally place the object of interest. This object of interest usually has some sharp details. At the edges of the FOV these
software can't line up the details with very low contrast with smeared features.

May be you have some other guesses about the reasons of such pictures non-uniformity in sharpness? I will red your guesses
with a great interest.


Valery.
"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: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by Valery » Mon May 02, 2016 5:41 pm

Carbon60 wrote:Hi Valery,

I hope you don't mind me saying, but I believe you can eliminate a little more noise from your wonderful image.

Here's a magnified view of before and after.
Comparison.png
The one on the left is the original and on the right a noise reduced version. The overall effect on the full image is subtle, but worth doing if there is a gain to be had, given the lengths you've gone to in order to capture the image in the first place.

You are certainly making a good case for large aperture solar imaging!

Stu.

Hi Stu,

Yes, you are right. I need to make my final images somewhat de-noised. Not much, of course, just a bit less noisy.

Thanks for your note and example.


Valery
"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: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by christian viladrich » Mon May 02, 2016 8:02 pm

Hello Valery,
With a C11 Edge HD, coma and field curvature would be corrected over a very large field. Still ... I don't want to push you on extra expenses ;-)
Best regards
Christian Viladrich
Co-author of "Astronomie Planétaire"
http://www.astroplanetes.com/
Co-author of "Astronomie Solaire"
http://www.astronomiesolaire.com/

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Re: Fibrils Flower on the Sun. 280mm aperture. NEW IMAGE add

Post by Valery » Mon May 02, 2016 9:05 pm

christian viladrich wrote:Hello Valery,
With a C11 Edge HD, coma and field curvature would be corrected over a very large field. Still ... I don't want to push you on extra expenses ;-)
Best regards

I know, I know, Christian. But my choice is C14. The C11 is just an intermediate step ahead.

It is important to have an open back of the tube.


Valery.
"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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