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NGC7822 in Hubble Pallet


TerryMcK

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NGC7822 in Hubble Pallet images acquired in September 2020

Telescope William Optics ZS103 with x0.8 reducer flattener

Camera ZWO ASI183MM

Filters Ha, OIII and SII

  • 60 x Ha 180 seconds Gain 111 Offset 8
  • 80 x OIII 180 seconds Gain 111 Offset 8
  • 40 x SII 180 seconds Gain 111 Offset 8

Processed with PixInsight, PhotoshopCC, Topaz Denoise AI

 

Bortle 7/8 with lots of local neighbourhood light polution.

 

NGC7822SHOTMC.thumb.png.ced2977d63fb786cac8e81d6469aaca4.png

 

 

Edited by TerryMcK
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33 minutes ago, TerryMcK said:

NGC7822 in Hubble Pallet images acquired in September 2020

Telescope William Optics ZS103 with x0.8 reducer flattener

Camera ZWO ASI183MM

Filters Ha, OIII and SII

Processed with PixInsight, PhotoshopCC, Topaz Denoise AI

 

Bortle 7/8 with lots of local neighbourhood light polution.

Looking great. Is it a straight up SHO, or a PixelMath blend?

 

Brian

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It was done by first doing a channel combo in SHO

Then a STF until it looked ok with a conversion to non linear.

 

Next removed the stars with StarNet (set at stride 32 to minimize artifacts on the large stars) and followed up with denoise in Topaz Demoise AI which is excellent by the way.

 

Then I used SCNR set as the following

image.png.d3d1254fc4f6bd2beef0b834d046c8cf.png to remove the green.

 

Then I simply boosted saturation a few times with curves to get the subtle colours in - I learnt that one from Chuck Ayoub on one of his Youtube's.

A star reduction on the star mask created by StarNet  after doing a Photometric Colour Calibration to get the stars the right colour. Normally I do that before a stretch but did it differently this time.

 

Here are the star reduction settings.

 

image.png.7fda5cbdb0f65d10d02178c334380434.png

 

and then added the stars back in with PixelMath.

 

I did some local histogram equalization and added a sRGB IEC61966-2.1 colour profile and saved it as a TIF. 

 

In PhotoShop I added the labels, flattened it and saved it as a PNG. It was huge but I installed Microsoft PowerToys from here  and reduced the PNG size to something forum friendly.

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