Rosette Nebula - Th...
 
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Rosette Nebula - The Rose in Space  

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(@robsi)
White Dwarf Customer
Joined: 12 months ago
Posts: 13
December 5, 2019 18:22  

This is my Rosette Nebula from last weekend. It's a mix of RGB and HOO from the OPTOLONG L-eNhance filter. I wanted to keep the colors natural, so I removed the stars from the Ha and O3 data and mixed it carefully to the RGB in Photoshop. I'm very happy with the result.

rose

Better resolution and data: https://astrob.in/rofath/0/

CS, Robert


 Davm
(@davm)
Main Sequence Star Customer
Joined: 2 years ago
Posts: 29
December 5, 2019 23:29  

Very nice result Robert. Any chance you could tell us a bit about how you went about removing the stars and the blending in PS? I also have the Optolong filter and have been trying RGB combine in APP and also using layers in Photoshop. Not too pleased with the results!

Regards Dave


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(@longinthetooth)
Molecular Cloud Customer
Joined: 3 months ago
Posts: 5
December 7, 2019 12:27  

That's a stunning image Robert. 


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(@vincent-mod)
Quasar Admin
Joined: 3 years ago
Posts: 1262
December 7, 2019 16:48  

Might very well be the new Starnet++ plugin? I have no PS knowledge, but that one seems very powerful. Beautiful image and blend!


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(@robsi)
White Dwarf Customer
Joined: 12 months ago
Posts: 13
December 7, 2019 17:26  

@davm

Thanks Dave!
It's much easier to show than to discribe, but I will try. The Dual-filter data I split into it's three mono channels. For removing the stars I use starnet++. Then I process each channel seperatly (denoising, etc.). For the mixing in Photoshop I set the layers to blendmode screen. Then I add a "hui/saturation adjustment layer" for each mono-layer with a clipmask, set it to colorize, choose the color (0 for red, 120 for green and 240 for blue), saturation to 100, lightness to -50 as a starting point. Than I tweek the mono-layer transparency and "lightness in the hui/saturation layer" till I get the color I like. Usualy I have to add some curve and level adjustment layers too.  I hope it's not too confusing.

CS, Robert


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(@robsi)
White Dwarf Customer
Joined: 12 months ago
Posts: 13
December 7, 2019 17:27  

@longinthetooth

Thanks a lot John!


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(@robsi)
White Dwarf Customer
Joined: 12 months ago
Posts: 13
December 7, 2019 17:29  

@vincent-mod

Thank you Vincent!

Yes, I use starnet++ to remove the stars 🙂 


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 Davm
(@davm)
Main Sequence Star Customer
Joined: 2 years ago
Posts: 29
December 7, 2019 19:48  

Many thanks for the workflow Robert. I'll have a read and try and get my head around that 😉 

Regards Dave


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