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Widefield M101

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#1 tjugo

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Posted 29 May 2020 - 07:22 PM

Hi,

M101 from the last new moon.

I definitely caught some very faint background structure however it was very close to the background and really difficult (for me at least) to pull without spoiling the rest of the image.

 

Higher res links:

https://mtanous.file...erifn_light.jpg

https://mtanous.file...101_dark_1x.jpg

 

Have a great weekend!

 

Details:

  • OTA Takahashi FSQ106 a F3
  • Camera Atik 11000
  • Mount Celestron CGEM
  • Filters Astrodon
  • Capture with Voyager Process
  • Pixinsight and Photoshop

 

Exposure

  • Total LRGB+Ha 139 -> 17h40m
  • L 29x10min -> 04h50m
  • R 28x5min -> 02h20m
  • G 27x5min -> 02h15m
  • B 33x5min -> 02h45m
  • Ha 22x15min -> 05h30m

m101_superifn_light.jpg

m101_dark_1x.jpg


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#2 sunnyday

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Posted 29 May 2020 - 07:29 PM

superb image, beautiful colors, details.
personally I prefer the second photo.
well done and thank you.


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#3 tjugo

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Posted 29 May 2020 - 07:38 PM

superb image, beautiful colors, details.
personally I prefer the second photo.
well done and thank you.

Thanks! I appreciate your feedback...

 

Clear skies,

 

José


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#4 clusterbuster

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Posted 29 May 2020 - 08:05 PM

Very nice, indeed !!!

 Mark


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#5 Mert

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Posted 30 May 2020 - 03:08 AM

That's an impressive wide field you captured.

The faint structures can already been seen, those nearly

18 hours of integration time really pay off well :waytogo:


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#6 tjugo

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Posted 30 May 2020 - 09:57 AM

Very nice, indeed !!!
Mark


Thanks. Glad you like like it.

CS,

José
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#7 tjugo

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Posted 30 May 2020 - 10:00 AM

That's an impressive wide field you captured.
The faint structures can already been seen, those nearly
18 hours of integration time really pay off well :waytogo:


Thanks. Originally I wanted to accumulate more data but weather had the last word.

Cheers,

José

#8 vakulenko_sergiy

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Posted 30 May 2020 - 11:01 AM

For my personal taste second one is better.

 

Interesting to see surroundings of M101 on widefield. Thanks for your efforts!


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#9 tjugo

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Posted 30 May 2020 - 11:32 PM

For my personal taste second one is better.

 

Interesting to see surroundings of M101 on widefield. Thanks for your efforts!

Thanks for the comment and feedback.

 

Cheers,

 

José



#10 tjugo

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Posted 31 May 2020 - 11:13 AM

Let me share a 3rd versión, something in the middle between the original 2 images.

 

Cheers,

 

José

 

https://mtanous.file...05/m101_rc2.jpg

 

m101_rc2.jpg


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#11 Jim Thommes

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Posted 02 June 2020 - 02:00 PM

José,  (Just my opinion...) I like your second  version best for a general visual rendition. The first version is a great view of depth and what appears to be foreground nebulosity. Your third version is great too, but it seems to be a bit of a compromise of first and second versions attributes.

 

Great capture and processing. Nice work.


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#12 calypsob

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Posted 02 June 2020 - 02:43 PM

Awesome work picking up super faint data. I like the first version the best, fantastic representation of whats really up there, its all too common to leave the area un stretched due to lack of data or poor calibration. Very nice


Edited by calypsob, 02 June 2020 - 02:44 PM.

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#13 tjugo

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Posted 02 June 2020 - 03:39 PM

José,  (Just my opinion...) I like your second  version best for a general visual rendition. The first version is a great view of depth and what appears to be foreground nebulosity. Your third version is great too, but it seems to be a bit of a compromise of first and second versions attributes.

 

Great capture and processing. Nice work.

Hi Jim, thanks for the comment and feedback, indeed the very first version looks harsh. I have made some 'improvements', basically I have processed the faint structure using wavelets, using wavelets allowed me to create a less harsh less grainy background structure.

 

Please take a look:

 

https://mtanous.file...06/m101_rc5.jpg

 

What you think?

 

Cheers,

 

José



#14 tjugo

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Posted 02 June 2020 - 03:41 PM

Awesome work picking up super faint data. I like the first version the best, fantastic representation of whats really up there, its all too common to leave the area un stretched due to lack of data or poor calibration. Very nice

Hi Wes,

 

Thanks for the comment and feedback. I managed to process the image in a way where the background looks smother. Please take a look here: https://mtanous.file...06/m101_rc5.jpg

 

What you think?

 

Cheers,

 

José


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#15 Jim Thommes

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Posted 02 June 2020 - 05:38 PM

Hi Jim, thanks for the comment and feedback, indeed the very first version looks harsh. I have made some 'improvements', basically I have processed the faint structure using wavelets, using wavelets allowed me to create a less harsh less grainy background structure.

 

Please take a look:

 

https://mtanous.file...06/m101_rc5.jpg

 

What you think?

 

Cheers,

 

José

José,

Yes, I think that is a better process for the first version. It looks like you went for a multi scale noise reduction of the faint background (what I think you mean when you say wavelets in PixInsight ). Of course this could destroy some of the very faint fine structure - but they were probably lost in the noise anyway. Now it shows the very large scale structure well without the distraction of what is likely medium scale noise rather than any real structure at those medium scales. Nice work.
 


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#16 tjugo

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Posted 02 June 2020 - 07:59 PM

José,

Yes, I think that is a better process for the first version. It looks like you went for a multi scale noise reduction of the faint background (what I think you mean when you say wavelets in PixInsight ). Of course this could destroy some of the very faint fine structure - but they were probably lost in the noise anyway. Now it shows the very large scale structure well without the distraction of what is likely medium scale noise rather than any real structure at those medium scales. Nice work.
 

Hi Jim,

 

Yes indeed I used the multiscale median transform with Median wavelet transform algorithm. I extracted the bottom wavelets and then added them to image with the darker background. No noise reduction per se, but similar end result, however extracting the bottom wavelets gave me more control over the final result.

 

Thanks for your feedback.

 

José  



#17 calypsob

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Posted 02 June 2020 - 11:52 PM

Hi Wes,

 

Thanks for the comment and feedback. I managed to process the image in a way where the background looks smother. Please take a look here: https://mtanous.file...06/m101_rc5.jpg

 

What you think?

 

Cheers,

 

José

that is incredible, you knocked it out of the park there! 




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