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My Best Carina Nebula Yet

dslr dso astrophotography
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#1 BQ Octantis

BQ Octantis

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Posted 29 January 2020 - 03:13 AM

G'day all,

 

It was unexpectedly clear a few nights ago. After my passable results on the Eta Carina Nebula last year, I've been wanting to try my 52mm aperture mask on it, and I was finally able to capture 76 minutes on it. With my recent switch from ACR 6.7 to RawTherapee5.6 for debayering, I get a lot cleaner results on the background noise, and I found I could get visually pleasing results from way out to way up close—with round stars from corner to corner:

 

post.jpg

 

I also found that with my latest techniques, I could actually scale up by 50% (I usually scale down by 50%). This allowed for a nice, full-screen crop of the Keyhole Nebula that showcases the deep contrast between the blues and reds:

 

The Great Nebula in Carina

 

I uploaded the full res to Astrobin:

 

get.jpg?insecure

Eta Carina Nebula, 2020-01-27

Canon 200mm f/2.8L II w/52mm aperture mask (~f/3.8)

Canon T3i, 153×30sec@ISO 800, 59×darks, 1×flat
Debayered and calibrated in RawTherapee5.6
Aligned & stacked in Lynkeos 3.3
Processed in Photoshop CS5 w/
Annie's Astro Actions v7.0 &
Astronomy Tools v1.6
Tropic of Capricorn, NT, Australia

 

Cheers!

 

BQ


Edited by BQ Octantis, 29 January 2020 - 03:21 AM.

  • Starman27, jambroseus, Traveler and 10 others like this

#2 BQ Octantis

BQ Octantis

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Posted 29 January 2020 - 08:00 PM

Check it out…smaller stars!

 

starcompare.jpg

 

BQ


  • Foc, ac4lt, Astroman007 and 1 other like this

#3 jambroseus

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Posted 30 January 2020 - 06:51 AM

Nice work BQ. I have the same lens and camera and also enjoy shooting 30 sec subs unguided with good results.

 

John



#4 sunnyday

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Posted 02 February 2020 - 09:27 AM

 magnificent.



#5 ChristopherBeere

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Posted 02 February 2020 - 01:57 PM

Very nice job BQ !!

 

Welcome to the RawTherapee club :]



#6 BQ Octantis

BQ Octantis

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Posted 03 February 2020 - 03:33 AM

Thanks to all for the kind words and likes!

 

BQ



#7 Teddythefinger

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Posted 03 February 2020 - 05:10 AM

Wow super cool, BQ! Man those colors really pop. Was raw therapy tough to learn?

#8 BQ Octantis

BQ Octantis

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Posted 03 February 2020 - 07:52 AM

Wow super cool, BQ! Man those colors really pop. Was raw therapy tough to learn?

Cheers, mate!

 

RawTherapee's pretty straightforward and hogs the processor less than ACR. But don't you already use DSS? All my color processing was in Photoshop; the reduced noise comes from RawTherapee subtracting darks in linear color space, which DSS already does…

 

BQ



#9 astronomos

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Posted 07 February 2020 - 01:05 AM

very cool




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