Date
1 - 20 of 60
Closeup of the Rosette with AP12" Mak-Cass
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Roland Christen
hello Astronuts,
4 Clear nights gave me the opportunity to image this Nebula at high resolution with our AP12" F12.5 Mak-Cass. I haven't used this scope for many years and recently brought it out of storage. The scope was made originally with optics by Intes-Micro in Russia, about 25 years ago. These guys were some of the finest opticians in the world, and very experienced in making Maksutov optics. Unfortunately they closed shop soon after.
Even though the skies were very clear and transparent, the temperatures were bitter cold, as low as -12F and the seeing (turbulence) ranged from poor to very bad. The H-a image was taken in poor seeing. I also took some OIII to get a color image, but that night the seeing was the worst i have ever seen, along with the full Moon that caused very grey background. So, we have only the monochrome H-a with lots of great detail showing thru the lousy seeing.
Brian Valente did the initial processing using Russel Croman's software. I processed the final version in MaximDL and Photoshop.
https://www.astrobin.com/full/ioseut/B/
Rolando
-- Roland Christen Astro-Physics |
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midmoastro
On Mon, Feb 6, 2023 at 12:16 PM, Roland Christen wrote:
https://www.astrobin.com/full/ioseut/B/Saw this on AB earlier and the detail is just incredible. So 3D like. Full res on the dark areas is just insane. Great work. Todd |
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Benoit Schillings
Roland, what is your impression on the accuracy of the details that
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these tools do show ? Is this something you were able to check using other images ? -- benoit On Mon, Feb 6, 2023 at 1:34 PM midmoastro <teche70@...> wrote:
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Roland Christen
I have not found other images showing this level of resolution in Ha. All the images I've seen are color which loses detail. Also most scopes image this object at small apertures and short focal lengths in order to cover the entire Rosette area.
Rolando
-----Original Message-----
From: Benoit Schillings <benoit.schillings@...> To: main@ap-gto.groups.io Sent: Mon, Feb 6, 2023 5:08 pm Subject: Re: [ap-gto] Closeup of the Rosette with AP12" Mak-Cass Roland, what is your impression on the accuracy of the details that
these tools do show ? Is this something you were able to check using other images ? -- benoit On Mon, Feb 6, 2023 at 1:34 PM midmoastro <teche70@...> wrote: > > On Mon, Feb 6, 2023 at 12:16 PM, Roland Christen wrote: > > https://www.astrobin.com/full/ioseut/B/ > > Saw this on AB earlier and the detail is just incredible. So 3D like. Full res on the dark areas is just insane. > Great work. > Todd > -- Roland Christen Astro-Physics |
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Roland Christen
To clarify further, once you start stretching the image you have lost the scientific reality and have gone down the road to making pretty pictures. Someone once said that after the invention of Photoshop nothing is real any more. That goes double for A.I.
As far as Croman's A.I. software, there is a good discussion of what it can do here:
https://www.astrobin.com/forum/c/astrophotography/deep-sky-processing-techniques/blurxterminator-technique-and-usage-thread/?page=1
Rolando
-----Original Message-----
From: chris1011@... To: main@ap-gto.groups.io <main@ap-gto.groups.io> Sent: Mon, Feb 6, 2023 5:26 pm Subject: Re: [ap-gto] Closeup of the Rosette with AP12" Mak-Cass I have not found other images showing this level of resolution in Ha. All the images I've seen are color which loses detail. Also most scopes image this object at small apertures and short focal lengths in order to cover the entire Rosette area.
Rolando
-----Original Message-----
From: Benoit Schillings <benoit.schillings@...> To: main@ap-gto.groups.io Sent: Mon, Feb 6, 2023 5:08 pm Subject: Re: [ap-gto] Closeup of the Rosette with AP12" Mak-Cass Roland, what is your impression on the accuracy of the details that
these tools do show ? Is this something you were able to check using other images ? -- benoit On Mon, Feb 6, 2023 at 1:34 PM midmoastro <teche70@...> wrote: > > On Mon, Feb 6, 2023 at 12:16 PM, Roland Christen wrote: > > https://www.astrobin.com/full/ioseut/B/ > > Saw this on AB earlier and the detail is just incredible. So 3D like. Full res on the dark areas is just insane. > Great work. > Todd > -- Roland Christen Astro-Physics |
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Joseph Beyer
I agree, yours is the best I've seen. It's pushing the line of fine art. To your point exactly, I shot mine in Ha a couple years ago using a full spectrum Nikon/8nm Chroma filter on an FSQ-106 just to see what the combination would produce. The details pale compared to the Mak-Cas.
https://www.astrobin.com/full/ffk3iz/D/ Joe |
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Benoit Schillings
Here is one I've found. looks like a pretty good match.
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On Mon, Feb 6, 2023 at 4:48 PM Joseph Beyer <jcbeyer2001@...> wrote:
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Roland Christen
What scope was that taken with?
Unfortunately color always compromises the quality of the detail (at least that's my opinion ;^)).
Roland
-----Original Message-----
From: Benoit Schillings <benoit.schillings@...> To: main@ap-gto.groups.io Sent: Mon, Feb 6, 2023 7:59 pm Subject: Re: [ap-gto] Closeup of the Rosette with AP12" Mak-Cass Here is one I've found. looks like a pretty good match.
On Mon, Feb 6, 2023 at 4:48 PM Joseph Beyer <jcbeyer2001@...> wrote: > > I agree, yours is the best I've seen. It's pushing the line of fine art. To your point exactly, I shot mine in Ha a couple years ago using a full spectrum Nikon/8nm Chroma filter on an FSQ-106 just to see what the combination would produce. The details pale compared to the Mak-Cas. > > https://www.astrobin.com/full/ffk3iz/D/ > > Joe > -- Roland Christen Astro-Physics |
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On Mon, Feb 6, 2023 at 03:08 PM, Benoit Schillings wrote:
Roland, what is your impression on the accuracy of the details thatHere's an exemplar taken with a mono camera and an h-alpha filter. Although not at the same high level of detail when comparing the dark nebula and Bok globules I can't see anything inaccurate in Roland's image that may be attributable to the method of processing. Hopefully this image comes through OK and isn't down sampled by the forum software.  -- Dean Jacobsen Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ |
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Can't get the full sized image - only 1000 x 1000 pixels. So here is a link to what I was talking about.
https://www.astrobin.com/ts6s1w/0/ -- Dean Jacobsen Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ |
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Benoit Schillings
very impressive. Roland, can you also post the original image ? Looks
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like deconv is really progressing a lot. -- benoit On Mon, Feb 6, 2023 at 8:47 PM Dean Jacobsen <deanjacobsen@...> wrote:
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Just to be clear, the image I posted did not have any deconvolution or any processing using the new sharpening tool from Russel Croman.
-- Dean Jacobsen Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ |
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>>>. So, we have only the monochrome H-a with lots of great detail showing thru the lousy seeing.
I think it's a pretty remarkable result for such poor seeing conditions. I hope you'll have the chance to image with this telescope in good seeing Brian |
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Benoit Schillings
looking back at it, I also do see a lot of small filament structure
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which looks like artefact. the overall image is amazing, but the small hairy structures looks invented. Opinions or Am I too sceptical of GAN type processing. -- benoit On Mon, Feb 6, 2023 at 9:21 PM Brian Valente <bvalente@...> wrote:
I think it's a pretty remarkable result for such poor seeing conditions. I hope you'll have the chance to image with this telescope in good seeing. So, we have only the monochrome H-a with lots of great detail showing thru the lousy seeing. |
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Which features are you looking at?
-- Dean Jacobsen Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ |
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Benoit Schillings
this kind of thing :
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On Mon, Feb 6, 2023 at 10:11 PM Dean Jacobsen <deanjacobsen@...> wrote:
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On Mon, Feb 6, 2023 at 10:07 PM, Benoit Schillings wrote:
looking back at it, I also do see a lot of small filament structureMaybe a little too skeptical. :-) I don't really see anything in the image that looks "invented" based on the much lower resolution exemplar I posted. It would be nice if someone could find a good reference from a much larger instrument. -- Dean Jacobsen Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ |
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Carl Björk
In his presentation video Adam Block does a comparison between BlurX revealed structure and Hubble images.
And it shows that nothing is "invented", all the revealed details are indeed real structures. BlurX is "just" a super deconvolution algorithm. To me its biggest strength is the automatic and local/multiple PSFs. Note that if BlurX is pushed too hard, it will also produce artifacts, tho they are bit different than traditional deconvolution artifacts. https://www.youtube.com/watch?v=_rWEuW4MTrQ I also recommend watching the interview with Russ which goes even more in depth. In general I recommend anything Adam posts. |
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christian viladrich
Hi, Here is an image taken with a Planewave CDK 600 by Nicolas Outter
and friends. This is a RGB OIII Ha SII composit. I understand this
is just the beginning of a mosaic : They have not made available the Ha channel until now. The processing is "soft" and don't use any IA technique. Still, it allows some comparison with the details acquired with the Mak 300. I can ask for the Ha channel if relevant. Christian
Le 07/02/2023 à 12:11, Dean Jacobsen a
écrit :
On Mon, Feb 6, 2023 at 10:07 PM, Benoit Schillings wrote: |
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Good reference. What would be fun would be for us to be able to process Roland’s image from the “linear” state - calibrated, aligned, and stacked but not stretched - using whatever tools we want and see what level of detail others can bring out while still keeping it “real”. Sort of a processing challenge with the participants disclosing their tools such as BlurXTerminator, Topaz DeNoise, etc. |
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