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Old 28-07-2021, 06:01 PM
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DSO's in 'Natural' Narrowband

Imagine imaging DSO's with a One Shot colour camera but with the added detail of Narrowband.

Here we have my interpretation of a "natural" palette, with the Sii on a 'ultrared', Ha in red and Oiii in green and blue channels and with the star colours removed.

A lockdown project,using data from earlier this season, processing inspired by Jose Carballada.

Taken from my light polluted suburban backyard, Bortle 7 - Melbourne.

CARINA
IC 2944
M8
M42
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Old 28-07-2021, 07:27 PM
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Certainly provides for a very dramatic look to the images. One for me to try maybe once i finally get some clear sky again.
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Old 28-07-2021, 08:19 PM
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Quote:
Originally Posted by Andy01 View Post
Imagine imaging DSO's with a One Shot colour camera but with the added detail of Narrowband.

Here we have my interpretation of a "natural" palette, with the Sii on a 'ultrared', Ha in red and Oiii in green and blue channels and with the star colours removed.
Lovely images and colours Andy You've been true to the respective wavelengths with that colour-scape. You could certainly call it natural-narrowband. Now if only our eyes could gather enough light and have such filters built-in.

Best
JA
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Old 28-07-2021, 08:54 PM
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ultrared?
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Old 28-07-2021, 11:00 PM
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ultrared?
I suspect it might be like deep red, like a Wratten 29 photographic filter (a darker slightly brownish red) versus the more common Wratten 25a standard filter red somewhat brighter. That would certainly logically accord with respective colours for the wavelengths of S-ll and H-a, but it's dealer's choice so who knows?

Best
JA
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Old 29-07-2021, 08:06 AM
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Originally Posted by The_bluester View Post
Certainly provides for a very dramatic look to the images. One for me to try maybe once i finally get some clear sky again.
Clear skies? What is this strange phenomena of which you speak?

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Originally Posted by JA View Post
Lovely images and colours Andy You've been true to the respective wavelengths with that colour-scape. You could certainly call it natural-narrowband. Now if only our eyes could gather enough light and have such filters built-in.

Best
JA
Indeed, but this will have to suffice until Skynet cyborg technology advancements are commonplace.

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ultrared?
Quote:
Originally Posted by JA View Post
I suspect it might be like deep red, like a Wratten 29 photographic filter (a darker slightly brownish red) versus the more common Wratten 25a standard filter red somewhat brighter. That would certainly logically accord with respective colours for the wavelengths of S-ll and H-a, but it's dealer's choice so who knows?

Best
JA
Essentially, in PS...
Sii >360
Ha >330
O3>200
With minor tweaks to taste.
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Old 29-07-2021, 10:10 AM
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Nice work as per usual Andy.

Thanks for sharing the processing
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Old 29-07-2021, 10:25 AM
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Andy,
Great images and nicely processed too
Very natural
Give Startools V1.7 a go for OSC or Mono narrowband
Ivo developed the Compose module I think about a year or two ago
Does a similar thing with “natural” narrowband, puts you in control of your colour processing with so many variables , presets and blends
He’s working on V1.8 at present and is in development stage
Cant wait for it to be completed
Cheers
Martin
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Old 29-07-2021, 10:33 AM
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Very tidy resolution and contrast but the colour is too "interpretive" for my liking.

Last edited by Peter Ward; 29-07-2021 at 10:49 AM.
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Old 29-07-2021, 10:59 AM
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Quote:
Originally Posted by PKay View Post
Nice work as per usual Andy.

Thanks for sharing the processing
Hi Peter, you're welcome, cheers.

Quote:
Originally Posted by Startrek View Post
Andy,
Great images and nicely processed too
Very natural
Give Startools V1.7 a go for OSC or Mono narrowband
Ivo developed the Compose module I think about a year or two ago
Does a similar thing with “natural” narrowband, puts you in control of your colour processing with so many variables , presets and blends
He’s working on V1.8 at present and is in development stage
Cant wait for it to be completed
Cheers
Martin
Thanks Martin.

I used to use Startools and quite liked the results, but when the Mac OS was upgraded, ST became too clumsy to access and constantly crashed, so I moved on to APP.

I also use PS everyday at the studio, so I'm unlikely to move to PI anytime soon either.

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Originally Posted by Peter Ward View Post
Very tidy resolution and contrast but the colour is too "interpretive" for my liking.
Thanks Peter.
FYI the three filter stacks have been assigned colours close to their actual bandwidths. ie: S2 672nm, Ha 656nm and O3 500nm. (see chart attached)
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Old 29-07-2021, 07:41 PM
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Sensational Andy. I really like them. The level of detail is amazing.

Greg.
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Old 29-07-2021, 07:43 PM
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Quote:
Originally Posted by Andy01 View Post
Thanks Peter.
FYI the three filter stacks have been assigned colours close to their actual bandwidths. ie: S2 672nm, Ha 656nm and O3 500nm. (see chart attached)
I suspect my response needs some explaining.
These are well known bright nebulae that are great to image.

They all have natural yet subtle colours that show the physical processes going on within them.

Adding "extra" intensity to a particular emission line can easily mask this.

There is no doubt that you've created an eye soothing set of images
but to me, they are almost duo-colour, with all of the subtle star colours,
absorption and emission processes masked as a result.

So it comes down to whether you like accuracy/fidelity, art or popular appeal.

There are no rules....more a case of a rising tide (i.e. popularity) can float many boats.
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Old 29-07-2021, 11:48 PM
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really nice results!!!
you pushed the idea to the limit congratulations!!!!

I tried this palette as a consequence when the usual HOO or Hubble was named as "not natural" in any way by some colleagues. Really I am a fan of narrow band and tone mapping.

But I agree that when we use narrow band, it is never natural but with these parameters it tries to feel like regular RGB on asteroids!!

PD: thanks for the mention by the way

Last edited by carballada; 30-07-2021 at 12:02 AM.
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  #14  
Old 30-07-2021, 03:00 PM
matlud (Mathew)
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Very nice Andy �� Like the palette, might have to try something similar on my next project ��
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Old 30-07-2021, 08:31 PM
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"Essentially, in PS...
Sii >360
Ha >330
O3>200"


I'd like to see how this is done in Photoshop
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  #16  
Old 31-07-2021, 06:26 PM
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mm, impressive detail and dramatic, but a bit duotonic?
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