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NGC 6960 Western Veil

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#1 donsinger

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Posted 05 December 2020 - 01:54 AM

Second processed photo...work to do but lots of fun learning post processing.

 

301 x 60s - 5 hours of integration time

AVX Mount

WO ZS 73 with Flattner

30mm guidescope

ASI 533 Pro at -5C

ASI 120MC guide cam

L-Pro filter

APT for image capture

PHD2 guiding

Processed with Star Tools v.1745 with a small tweak at the end in PS

 

Taken from my back porch in mid-October in Bortle 7/8 skies, about 1.5 miles west of downtown Portland

 

Better rendition with a larger TIFF file on Astrobin at https://www.astrobin...fjo2/B/?nc=user

 

Attached Thumbnails

  • NGC_6960_WESTERN_VEIL_NEBULA_WI_L-PRO-ST2_PS_v2.jpg

  • david.shadrach, milkychris and By-tor like this

#2 imtl

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Posted 05 December 2020 - 03:03 AM

You got a very nice image here. 

 

If you were after some comment regarding your image then first, on your abin you have uploaded a lower resolution image (as you posted here) so you might want to check which file you chose to upload.

 

Regarding the image itself, your stars are a bit overwhelming your image. You might want to work on them a bit.

 

The colors are dictated by the filter probably, did you tweak the tonemap at all?

 

I think for 5 hours integration you are off to a very nice start. Keep going!



#3 maxsid

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Posted 05 December 2020 - 03:31 AM

I could immediately tell this was processed with StarTools. Its style I can recognize now. 



#4 donsinger

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Posted 05 December 2020 - 01:24 PM

You got a very nice image here. 

 

If you were after some comment regarding your image then first, on your abin you have uploaded a lower resolution image (as you posted here) so you might want to check which file you chose to upload.

 

Regarding the image itself, your stars are a bit overwhelming your image. You might want to work on them a bit.

 

The colors are dictated by the filter probably, did you tweak the tonemap at all?

 

I think for 5 hours integration you are off to a very nice start. Keep going!

Thanks much for the feedback and yes I do need to learn how to push the stars back....what do you mean by tonemap?

 

Thanks Don



#5 imtl

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Posted 05 December 2020 - 04:13 PM

Don,

 

I meant did you tweak the colors at all.



#6 donsinger

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Posted 06 December 2020 - 09:06 PM

Don,

 

I meant did you tweak the colors at all.

Yes, I balanced them the best I could in PS because there seemed to be too much blue coming out of StarTools.

 

Any suggestions regarding reducing Stars making image appear so busy?

 

Thanks!



#7 Ivo Jager

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Posted 07 December 2020 - 09:34 PM

I could immediately tell this was processed with StarTools. Its style I can recognize now. 

Could you explain what you mean by that? Processing tools don't have "styles"? (though if they are competent they definitely should allow you to develop one!).

 

Yes, I balanced them the best I could in PS because there seemed to be too much blue coming out of StarTools.

You can't balance the colors of a stretched image (that is - not in a way that makes mathematical sense).

Would you be able to explain what you mean by "too much blue"? Do you mean some sort of chromatic aberration around the stars? Does the MaxRGB mode show too much blue as well?

 

Any suggestions regarding reducing Stars making image appear so busy?

Have you tried the Super Structure and Shrink modules? Also, be sure to use AutoDev (and not FilmDev), unless you are specifically looking for the more "bloated" stellar profiles as seen in chemical photography.


Edited by Ivo Jager, 07 December 2020 - 09:35 PM.


#8 donsinger

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Posted 08 December 2020 - 01:26 AM

Hi Ivo

 

Thanks for chiming in. I did use maxrgb and zoomed in, then selected a green area and the colors seemed to balance pretty well, but still seemed slightly green so I increased the green bias some more and overdid it. The image looked the same in PS and the histogram revealed a blue bias so I made a few small tweaks to get it more pleasing to my eye.

 

Also, used Autodev...have practiced a lot using it and like it. I do not use the Filmdev module except for using the skyglow algorithm at the end of processing to make the background have a hint of gray. 

 

I did use the Superstrucure module and got good results.

 

I thought I would get better results in taming the star field with the Shrink module but this is as far as I could push it. After trying some of the presets, I went back to the default Dimstars preset which did the best of the bunch-just wish I could eliminate some more stars to bring the nebulosity to forefront.

 

Still pleased this being my 2nd image

 

Don


Edited by donsinger, 08 December 2020 - 01:34 AM.


#9 Ivo Jager

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Posted 08 December 2020 - 03:04 AM

Still pleased this being my 2nd image

 

Don

It honestly blows me away sometimes that someone's 2nd image can these days be the Veil nebula. Not the easiest object at all. Great work! waytogo.gif



#10 maxsid

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Posted 08 December 2020 - 03:34 AM

Ivo,

The stars look in some peculiar way after StarTools. Very recognizable to me.

I am not saying it's something bad by no means.

 

Could you explain what you mean by that? Processing tools don't have "styles"? (though if they are competent they definitely should allow you to develop one!).



#11 Ivo Jager

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Posted 10 December 2020 - 06:26 AM

Ivo,

The stars look in some peculiar way after StarTools. Very recognizable to me.

I am not saying it's something bad by no means.

Ah. smile.gif Perhaps it's AutoDev's detail-preserving highlight stretching? Just like a human (should), it preserves the stellar profiles and their diffraction patterns by carefully stretching the highlights. When stretched correctly, each non-overexposed star should reveal - assuming circular, unobstructed opening and a perfect lens - an Airy disc diffraction pattern. E.g., something like this;

 

1280px-Airy-pattern.svg.png
 

That's in an ideal world obviously, and any obstructions of the optical path (spider vanes, central obstructions, focuser, screws) or miscollimation, etc. will change the appearance of the pattern.


Edited by Ivo Jager, 10 December 2020 - 06:26 AM.


#12 DeanCN

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Posted 10 December 2020 - 07:26 AM

nice image!  Maybe this will help your colors with StarTools: 

the documentation concerning Color (https://www.startool...les/color/usage)

particularly the section "White point reference by mask sampling."  I recently read

this masking technique and found it improves the color distribution among stars

and the image overall.  I use MaxRGB mode to help balance color bias after first

setting the white point reference.



#13 By-tor

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Posted 10 December 2020 - 08:18 AM

Nice image..  

 

I shot the eastern veil last night and hope for clear skies tonight to image the western veil..



#14 donsinger

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Posted 11 December 2020 - 02:08 AM

nice image!  Maybe this will help your colors with StarTools: 

the documentation concerning Color (https://www.startool...les/color/usage)

particularly the section "White point reference by mask sampling."  I recently read

this masking technique and found it improves the color distribution among stars

and the image overall.  I use MaxRGB mode to help balance color bias after first

setting the white point reference.

Thafor the link...had read it once before but forgot about it...good reference 




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