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Old 24-10-2020, 08:27 AM
Startrek (Martin)
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Reprocess of NGC 253 Sculptor Galaxy

Captured this Galaxy back in September with my new ZWOASI2600MC camera and due to cloud blanketing the east coast for the next 1 to 2 weeks decided to do some reprocessing and see if I can improve anything in the image
Subs Stacked in DSS with darks only
Processing software Startools V1.6
OSC Linear data set ( image is processed in Luminance until you hit the colour module )
Binned at 50%
Re orientated / cropped the object to lie on a 40 degree plane rather than a 65 degree plane
Experimented with AutoDev to expose the main arms and not blow the core out to much
Created a Star mask and kept it all the way through each module
Contrast to 15%
HDR in the core area
Increased Deconvolution to 4 pixels to form some structure
A bit of Sharpening up to 150
A bit of Life ( Less More ) to reduce the noise grain and increase detail
Fiddled with Colour , Scientific mode
Noise reduction to 5.5 pixels
Final LRGB image

Total time to stack and process approx 2 hours

The reprocess exposed a little more detail but still a little grainy and colour a bit washed.Always good to have another go at it

Comments most Welcome

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Old 24-10-2020, 08:50 AM
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the detail and colour in the galaxy is great - I like it! to my eyes the right balance of detail and graininess (I'm not a fan of over smoothed).

some of the stars look a bit odd though... a hard dark halo on a few and some with inner rings?
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Old 24-10-2020, 08:52 AM
Saturnine (Jeff)
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That looks to be a very well captured and processed image, has a lovely aesthetic feel to it. The colours of the core and spiral arms, the dark dust clouds and diffraction spikes on the brighter stars, I like it .
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Old 24-10-2020, 09:01 AM
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PKay (Peter)
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Good effort Martin.

All the hard work pays of eventually.
Plenty of detail appearing.

Were expecting a 'Startools for dummies' from you :-)
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Old 24-10-2020, 11:03 AM
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Martin, clean and plenty of details. And 2 hours of light frames only!!!
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Old 24-10-2020, 11:47 AM
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Sunfish (Ray)
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Well done. The sharper processing seems to work to add more detail with the purple against yellow colour. Less green.
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Old 24-10-2020, 04:17 PM
jahnpahwa (JP)
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Lots of nice detail there Martin, well done mate
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Old 25-10-2020, 07:16 AM
Startrek (Martin)
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Thanks everyone
Appreciate it
I guess some time out for everyone on the east of the continent as this monster low is slow moving so no clear nights for at least the next 1 to 2 weeks. A good time to do some housekeeping and maintenance on your telescope, mount , laptop and reprocessing some old data like I did.
Thanks again
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