Log in

View Full Version here: : NGC 6334 - Synthetic RGB


ejcruz
26-07-2009, 10:35 PM
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

DavidU
26-07-2009, 10:41 PM
Nice shot mate ! Synthetic RGB's can be dramatic.
Was this the WO 110 & QHY8?

leon
26-07-2009, 10:46 PM
Hmmm, that is very impressive Eddie, certainly seems very sharp, nice work mate.

Leon

ejcruz
26-07-2009, 11:09 PM
Thank you Leon


This was captured using WO FLT110 f/7 and QHY9.

Cheers
Eddie

Screwdriverone
27-07-2009, 12:00 AM
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

dugnsuz
27-07-2009, 07:22 AM
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

renormalised
27-07-2009, 08:59 AM
Very interesting way of capturing a neb....looks a lot like an oil painting!!!!:eyepop::D

ejcruz
27-07-2009, 09:00 AM
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.


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

Cheers
Eddie

Craig_L
27-07-2009, 10:58 AM
Very nice shot Eddie Lots of detail. How long were the subs for the Ha and OIII with the QHY9?

gregbradley
27-07-2009, 11:16 AM
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.

Alchemy
27-07-2009, 04:26 PM
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.

Omaroo
27-07-2009, 05:22 PM
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? :thumbsup:

Hagar
27-07-2009, 10:29 PM
Nice image Eddie. Rich in both colour and detail.

Very well done.