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Soul - Nebula

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#1 akulapanam

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Posted 14 November 2018 - 02:19 AM

Almost 8 hours of total exposure time with my QHY16200 + RH200.  I had a very hard time with this one but I actually think it came out ok.  I'm still really struggling with the Optolong filters. Blue needs 5 minute frames compared to 3 for Red and Green. The low signal to noise for blue results in a bit too much yellow in some nebulous regions. Red also had a bit higher FWHM that required shrinking the stars in the red channel a bit which causes some artifacts when combined arcsinhstretch.

 

Had a hard time deciding from 3 different versions.  The main difference is the amount of stretching and I overkilled it a bit on SCNR and had to re-neutralize the background.

 

Final Opt 3 PS.jpg

 

Full version here 

 

https://www.astrobin.com/376713/C/

 


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#2 sharkmelley

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Posted 14 November 2018 - 03:00 AM

Great image!  The stars are sharp right to the edges of the frame - as expected with an RH200 wink.gif  

 

You're right about the lack of blue - a stronger blue channel would enhance the image.

 

Mark


Edited by sharkmelley, 14 November 2018 - 03:04 AM.


#3 agmoonsolns

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Posted 14 November 2018 - 05:04 AM

Beautiful!



#4 akulapanam

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Posted 14 November 2018 - 11:37 AM

Thanks!

#5 BenKolt

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Posted 14 November 2018 - 11:55 AM

That looks really cool in LRGB!

 

Ben



#6 akulapanam

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Posted 14 November 2018 - 02:10 PM

That looks really cool in LRGB!

Ben


Thanks, I’ve become a bigger fan of LRGB for these objects than HaRGB. It’s much harder to get correct color with HaRGB because the HA signal simply overwhelms the RGB. You also loose reflection nebula regions and for most objects enough L reveals 70-80% of the same details.


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