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  #1  
Old 18-03-2018, 05:18 PM
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Peter Ward
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NGC 3576 in colour

Nice to get some clear weather and new colour data.

The h-a blend is no longer too ropy, the re-pro has fixed most of it

The colourful result is here
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Click for full-size image (N3567.jpg)
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Last edited by Peter Ward; 19-03-2018 at 03:55 PM.
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  #2  
Old 18-03-2018, 05:38 PM
Star Catcher (Ted Dobosz)
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Excellent Peter! I've got something to aim for now
Ted
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  #3  
Old 18-03-2018, 08:17 PM
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Hi Peter,
lovely crisp tiny stars & great detail.
You can tell that it's an ultra premium scope.
I would have been tempted to adjust it in LAB mode to bring
out a greater variation in colours.
There are brown, tan & many more shades of red to dig out.

cheers
Allan
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  #4  
Old 18-03-2018, 09:29 PM
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Quote:
Originally Posted by alpal View Post
Hi Peter,
lovely crisp tiny stars & great detail.
You can tell that it's an ultra premium scope.
I would have been tempted to adjust it in LAB mode to bring
out a greater variation in colours.
There are brown, tan & many more shades of red to dig out.

cheers
Allan
Ta Allan. I had not visited this one for a while...and forgot that it really is quite faint, hence probably needs a couple of hours in each RGB channel to finesse the colour....which as you say is subtle but varied.

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Originally Posted by Star Catcher View Post
Excellent Peter! I've got something to aim for now
Ted
Thanks Ted. I was considering getting some more data tonight...but the temperature today was NUTS...it's Autumn, 10.30pm at night and still 30 degrees C! WTF ????
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  #5  
Old 19-03-2018, 07:43 AM
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Lots of nice sharp detail Peter. I agree about the colour, its a tough one to get looking right in my experience.
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  #6  
Old 19-03-2018, 12:10 PM
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Quote:
Originally Posted by Paul Haese View Post
Lots of nice sharp detail Peter. I agree about the colour, its a tough one to get looking right in my experience.
Thanks Paul. With some spare time I had yesterday, I tidied up the H-alpha blend. The colour is more nuanced and the blue ringed stars are fairly well tamed. Looks really nice on a 5k monitor

Same URL
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  #7  
Old 19-03-2018, 04:45 PM
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Nice repro Peter,
I wish you would have kept the original so we could
compare.
You've definetly got the left hand nebula looking further away -
it's darker with far more colours.
Wow that has got to be the most photogenic pair of nebulas out there
for astronomers to capture - only the Trifid & Eta can come close.

cheers
Allan
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  #8  
Old 19-03-2018, 05:04 PM
JA
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Great contrast + detail

Best
JA
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  #9  
Old 19-03-2018, 05:14 PM
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A tasteful, aesthetically pleasing image, with beautiful star colours. You've preserved the detail in the H-alpha only version, something we found difficult.

Best,
Mike
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  #10  
Old 19-03-2018, 06:14 PM
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Atmos (Colin)
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I'm usually not too impressed with this region in RGB but this one I do like. Very nice contrast throughout the image and good colour rendition.
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  #11  
Old 19-03-2018, 06:29 PM
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Quote:
Originally Posted by Placidus View Post
A tasteful, aesthetically pleasing image, with beautiful star colours. You've preserved the detail in the H-alpha only version, something we found difficult.

Best,
Mike
Too kind. It was tricky getting the booming h-alpha data to co-operate... in the end I found less is best.

Quote:
Originally Posted by JA View Post
Great contrast + detail

Best
JA
Glad you enjoyed the view

Quote:
Originally Posted by alpal View Post
Nice repro Peter,
I wish you would have kept the original so we could
compare.
You've definetly got the left hand nebula looking further away -
it's darker with far more colours.
Wow that has got to be the most photogenic pair of nebulas out there
for astronomers to capture - only the Trifid & Eta can come close.

cheers
Allan
Agreed...the are not too many nebulae that show such contrasting colours due their relative distance. (that's not quite right...due more intervening dust ahead of the more distant object )

Not overly big or bright...hence I suspect this is the reason it does not get hammered as often as M42 or Eta Carina. I have targeted this before with my 12" F3.8...the lack of image scale however led to a very average result.

I suspect it might do well with a HaRGB OIII SII mix. Sadly the weather forecast says otherwise for now
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  #12  
Old 20-03-2018, 01:03 PM
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cometcatcher (Kevin)
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Looks fantastic! I want to try for it but will be disappointed after seeing your image.
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  #13  
Old 20-03-2018, 03:28 PM
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Looks fantastic! I want to try for it but will be disappointed after seeing your image.
Very kind....and certainly have a go at this one for yourself...there is no need to please anyone else
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  #14  
Old 21-03-2018, 02:11 PM
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Wow! Like Madonna on a chariot leading the Sydney Mardi Gras - that's big bold and er - very pink!
Love the star colours and the subtle rendering of the dark neb above lady Liberty.

Wonderful sharp details, not sure about the pink... did I mention it's bright? lol
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  #15  
Old 21-03-2018, 02:34 PM
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An impressive rendition. What I like is the nebula colours and detail and the way you can tell the right hand nebula is further away which I have to say is the first time that has been shown in versions I have seen.

What I find personally a bit distracting is the star colours are overly saturated and the yellow stars have fairly bright red ring around them. Seeing as the Malin's thing this year is about star colour and David says they are pastel shades then these stars must be too colourful. Makes for a high impact artistic image though.

Greg.
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  #16  
Old 21-03-2018, 03:52 PM
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Quote:
Originally Posted by gregbradley View Post
An impressive rendition. What I like is the nebula colours and detail and the way you can tell the right hand nebula is further away which I have to say is the first time that has been shown in versions I have seen.

What I find personally a bit distracting is the star colours are overly saturated and the yellow stars have fairly bright red ring around them. Seeing as the Malin's thing this year is about star colour and David says they are pastel shades then these stars must be too colourful. Makes for a high impact artistic image though.

Greg.
Thanks for the constructive comments Greg...yes the rings are proving problematic as the seeing during the RGB collection was just average.

Suffice to say I would not toss this "Las Vegas" IIS version into CWAS...David's keen eye requires a more subtle, and accurate approach all around.


Quote:
Originally Posted by Andy01 View Post
Wow! Like Madonna on a chariot leading the Sydney Mardi Gras - that's big bold and er - very pink!
Love the star colours and the subtle rendering of the dark neb above lady Liberty.

Wonderful sharp details, not sure about the pink... did I mention it's bright? lol
Strike me pink Andy! You say it's too pink?

Actually I don't know for sure.....sooo many images of this puppy are Narrow Band and the colour versions vary wildly.
I suspect there really is some H-beta in there somewhere, just need to work out how much
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  #17  
Old 21-03-2018, 08:20 PM
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Absolutely superb! I think that the colour works well Peter
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  #18  
Old 22-03-2018, 09:05 AM
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Absolutely superb! I think that the colour works well Peter
Thanks
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  #19  
Old 23-03-2018, 02:44 PM
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Exceptional details.
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  #20  
Old 23-03-2018, 06:32 PM
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Exceptional details.
Thanks very much Marc.

It's a tricky one to process as Pixinsight does not do a great job, in this case, of sorting out the gradients. (ah...the joys of urban imaging )

That said I think I'm converging on a solution
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