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

lens making dslr dso classic astrophotography
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20 replies to this topic

#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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#14 skanker

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Posted 06 October 2020 - 02:14 PM

Maybe this is quite interesting for some ...

 

I set up the equipment I used in the studio and made a product photo :)

 

 

ao4tq3qv.jpg

 

CS


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#15 tkottary

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Posted 06 October 2020 - 03:07 PM

Off topic : I wish fornax released a contender to  AT 360.  


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#16 John Gauvreau

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Posted 06 October 2020 - 04:45 PM

Very nice!  Well done, and thanks for sharing.  


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#17 chanrobi

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Posted 06 October 2020 - 10:18 PM

Maybe this is quite interesting for some ...

 

I set up the equipment I used in the studio and made a product photo smile.gif

 

 

ao4tq3qv.jpg

 

CS

Looks like its balanced quite far from the axis of rotation -- does this cause any problems?



#18 Traveler

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Posted 06 October 2020 - 10:57 PM

Very nice Skanker!!

Can you tell us a little about how you procesed this? 



#19 skanker

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Posted 07 October 2020 - 12:48 AM

Looks like its balanced quite far from the axis of rotation -- does this cause any problems?

I have optimally positioned the setup for the product photo. When the nebula was recorded, everything was pretty much exactly above the axis because the deep sky object was 90 degrees above me.

 

There were no problems :)


Edited by skanker, 07 October 2020 - 12:49 AM.


#20 Starman27

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Posted 07 October 2020 - 10:40 AM

That is a fine image.



#21 skanker

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Posted 08 October 2020 - 12:49 AM

Very nice Skanker!!

Can you tell us a little about how you procesed this? 

With pleasure smile.gif

 

The lights were stacked and calibrated in Astro Pixel Processor. 

 

I separated the nebulae from the stars with starnet++.The nebulae were stretched in Photoshop and adjusted in color.The layer with the stars was then blended into the nebula layer.

 

You can find more details about the picture on Astrobin!

 

CS


Edited by skanker, 08 October 2020 - 12:51 AM.



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