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Old 26-07-2009, 10:35 PM
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ejcruz (Eddie)
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NGC 6334 - Synthetic RGB

Having a go at synthetic RGB using Ha and Oiii.
Processed as follows:
Red = Ha
Green = Oiii
Blue = Oiii+Ha(15%)
The image consist of Ha=2h and Oiii=3h.
Small version
http://ejcruz.smugmug.com/photos/602052368_xrzVT-L.jpg
Larger version
http://ejcruz.smugmug.com/photos/602052368_xrzVT-X3.jpg

Comments/advise always welcome.

Cheers
Eddie
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  #2  
Old 26-07-2009, 10:41 PM
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DavidU (Dave)
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Nice shot mate ! Synthetic RGB's can be dramatic.
Was this the WO 110 & QHY8?
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Old 26-07-2009, 10:46 PM
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Hmmm, that is very impressive Eddie, certainly seems very sharp, nice work mate.

Leon
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Old 26-07-2009, 11:09 PM
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ejcruz (Eddie)
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Quote:
Originally Posted by leon View Post
Hmmm, that is very impressive Eddie, certainly seems very sharp, nice work mate.

Leon
Thank you Leon

Quote:
Originally Posted by DavidU View Post
Nice shot mate ! Synthetic RGB's can be dramatic.
Was this the WO 110 & QHY8?
This was captured using WO FLT110 f/7 and QHY9.

Cheers
Eddie
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  #5  
Old 27-07-2009, 12:00 AM
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Screwdriverone (Chris)
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Very cool Eddie,

If you look closely, it seems there is a giant Eel turning its head on the right, trying to bite (in anticlockwise order), an owl, a bison and a sloth.

Or is that just me?

Cool picture, thanks for posting.

Cheers

Chris
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  #6  
Old 27-07-2009, 07:22 AM
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dugnsuz (Doug)
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Very interesting shot Eddie - there's a wealth of texture and detail that I've never seen before in standard RGB shots of this object.

Looks like a bit too much noise reduction has been applied though.
Was it very difficult to process re noise or is that an blending artefact?

This is a technique I would like to try with my modded DSLR/Lenses in the future as Astronomik now have Ha, OIII and SII filters as EOS clip in models. I have been using the Ha clip in filter successfully - wonder if OIII and SII might be a bit ambitious for a DSLR!!??

Great shot - very impressive.
Doug
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  #7  
Old 27-07-2009, 08:59 AM
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renormalised (Carl)
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Smile

Very interesting way of capturing a neb....looks a lot like an oil painting!!!!
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  #8  
Old 27-07-2009, 09:00 AM
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ejcruz (Eddie)
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Quote:
Originally Posted by dugnsuz View Post
Very interesting shot Eddie - there's a wealth of texture and detail that I've never seen before in standard RGB shots of this object.

Looks like a bit too much noise reduction has been applied though.
Was it very difficult to process re noise or is that an blending artefact?

This is a technique I would like to try with my modded DSLR/Lenses in the future as Astronomik now have Ha, OIII and SII filters as EOS clip in models. I have been using the Ha clip in filter successfully - wonder if OIII and SII might be a bit ambitious for a DSLR!!??

Great shot - very impressive.
Doug
Thank you Doug, it's not blending it's just me over processing with too much Oiii stretching, I think you will need a very bright target to use Sii.

Quote:
Originally Posted by Screwdriverone View Post
Very cool Eddie,

If you look closely, it seems there is a giant Eel turning its head on the right, trying to bite (in anticlockwise order), an owl, a bison and a sloth.

Or is that just me?

Cool picture, thanks for posting.

Cheers

Chris
Thanks Chris, now that you pointed it out it does look like an eel.

Cheers
Eddie
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  #9  
Old 27-07-2009, 10:58 AM
Craig_L
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Very nice shot Eddie Lots of detail. How long were the subs for the Ha and OIII with the QHY9?
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  #10  
Old 27-07-2009, 11:16 AM
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Thats a very stunning image.

Nice choice of equipment too, APO110mm F7 and QHY9 - a nice matchup.

Getting a good match up with your gear is an important part of this hobby.

Greg.
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  #11  
Old 27-07-2009, 04:26 PM
Alchemy (Clive)
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the detail in the brighter sections is good, but the dimmer sections do look as though too much noise reduction has been used ive never done narrowband so i cant comment on how to fix it.
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  #12  
Old 27-07-2009, 05:22 PM
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Omaroo (Chris Malikoff)
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Very nice Eddie

I'm experimenting with similar techniques, but am using Ha as red, OIII as blue, and a multiplied mix of both as synthetic green. The synthetic green channel is created by multiplying the OIII layer with the Ha layer.

Have a squizz here:

http://www.starrywonders.com/bicolortechniquenew.html

Great fun, no?
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  #13  
Old 27-07-2009, 10:29 PM
Hagar (Doug)
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Nice image Eddie. Rich in both colour and detail.

Very well done.
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