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NGC 7000 - First light Sigma 105mm f1.4 A

lens making dslr dso classic astrophotography
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#1 skanker

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Posted 16 September 2020 - 11:45 AM

Hello from Austria!

 

I was finally able to test my new Sigma lens on a deepsky classic. Please take a look at the picture on Astrobin because the picture quality is quite limited here.

 

>> https://www.astrobin...dz246j/?nc=user <<

 

 

NGC_7000_105mm_cn.jpg

 

 

As always, critical feedback is welcome smile.gif

 

CS


Edited by skanker, 16 September 2020 - 11:47 AM.

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#2 sunnyday

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Posted 16 September 2020 - 11:58 AM

spectacular image, a very nice definition, thanks.



#3 astro rocketeer

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Posted 16 September 2020 - 01:08 PM

very nice depth to this image... very nice! wow!



#4 skanker

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Posted 16 September 2020 - 03:23 PM

Thx :)

#5 astrohound24

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Posted 16 September 2020 - 09:47 PM

That is outstanding and beautiful!!

#6 skanker

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Posted 17 September 2020 - 02:30 PM

Thx :)
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#7 ant-man

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Posted 19 September 2020 - 10:33 PM

Question: when I try the North America nebula, stock Sony a6400, the stars are so bright that it obscures the beauty of the nebula itself although it is visible. You have such a strong contrast with the nebula vs the stars. 
 

I’d that because of the L-Pro filter. Does the filter dim out the stars a bit to let nebulae shine? 



#8 skanker

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Posted 20 September 2020 - 10:22 AM

Question: when I try the North America nebula, stock Sony a6400, the stars are so bright that it obscures the beauty of the nebula itself although it is visible. You have such a strong contrast with the nebula vs the stars. 
 

I’d that because of the L-Pro filter. Does the filter dim out the stars a bit to let nebulae shine? 

 

Hello ant-man!

 

The L-Pro filter only helps against light pollution and does not make the stars less bright.

 

The appearance of the image has to do with the processing. The first thing I do is separate the nebulae from the stars (with starnet++). This way i can boost the nebulae without making the stars brighter. At the end i put a little stretched layer with stars over the only-nebula layer and put them together.

 

I can tell you that it wasn't easy to edit the picture as it looks now. Without a modified camera, you probably have no chance of achieving a similar result.

 

CS



#9 Mikew9788

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Posted 21 September 2020 - 12:12 PM

Did you shoot the lens wide open or stop it down a little?

#10 t-ara-fan

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Posted 21 September 2020 - 02:36 PM

Hey Fornax! They are good.  Other than having to rewind it every 2 hours.

 

The stars look very sharp in the corners.  What aperture did you use?



#11 skanker

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Posted 21 September 2020 - 03:27 PM

Did you shoot the lens wide open or stop it down a little?

Hi!

 

The lens was stopped down to f1.8.

 

CS



#12 skanker

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Posted 22 September 2020 - 11:39 AM

Hey Fornax! They are good.  Other than having to rewind it every 2 hours.

 

The stars look very sharp in the corners.  What aperture did you use?

The Lightrack II is awesome :) I stopped the lens down to f1.8!

 

CS



#13 t-ara-fan

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Posted 22 September 2020 - 03:54 PM

The Lightrack II is awesome smile.gif I stopped the lens down to f1.8!

 

CS

That is still very fast.  A nice toy, I should talk to Santa ;) 
 


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