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NGC281 HaRGB

Started by Trannyguy, 11/03/2008 03:36AM
Posted 11/03/2008 03:36AM Opening Post
Hello,

I posted a version of this awhile back that I was not too happy with,I spent a good deal of time processing the data I had and decided that the RGB was just not deep enough to get a good result so I reshot it grin

Had a good night to shoot,very transparent skies and decent seeing.
I collected 15x600s each of RGB to go along with the 40x600s of Ha I had shot previously.

I went about the processing a bit different,I created a Synthetic Luminance from the average of all the RGB subs and added Ha to it at about 50%.I also added Ha into the Red at 25% and into the Blue at %5.
I converted the HaR,RGB image to lab mode and replaced the lightness image with the Synthlum,Ha image.I like how this worked,I have used lab color before for adding the luminance image but never for Ha.
I added Ha as luminance after this in just a small amount,maybe about 8%.
This gave me a pretty good color,I think.


So this is now about 14 hours total exposure time and so much processing time I'm trying to forget about it!
I think this result is much better than the first version,I would still like to get some more of the Ha into it but it is on the edge of starting to turn Salmon colored if I put anymore in.
Somewhere along the way I lost control of the stars and they grew large on me,when my eyes recover from this round I may go back and try again.

Imaged with my TMB115 at F7,ST-10xme and 1200gto
Acquisition automated with CCDAP4.
CCDStack and CS2 for the processing.

Thanks for looking,comments and tips welcome.

Jason


Attached Image:

Trannyguy's attachment for post 44439
Posted 11/03/2008 12:37PM #1
I think it looks good. And I always appreciate posting those processing tricks. That sounds complicated, by the way, but it also sounds like you must have tried many variations.

Fort Lewis Observatory: (37.238, -108.052) ~2360m (7744 ft.) elevation.
Darkness - typically 6.5+
Scope - Meade 16" LX200; f6.3 focal reducer
Focus - JMI Smart focus
Camera - SBIG ST-10XE; (~.5"/pixel)
Guiding - AO-8 and/or Meade 5"/DSI/PHD
http://www.fortlewis.edu/observatory
Posted 11/03/2008 11:36PM #2
Wonderful image Jason, well done! 8)
Thank you for sharing!

Ivan Gastaldo 8)
Coconut Creek, FL

Ivan's Observatory
Lat 26N 16' 48" Long 80W 10' 48"
[COLOR="Red"]Personal Website:[/COLOR] http://www.ivangastaldo.com

CCD Imaging and Processing/Deep Sky - Moderator
I like to complain about everything - Moderator
Posted 11/04/2008 03:37AM #3
Nicely done Jason. I like what you did with the LAB color.

Jim Thommes

Mak-Newt 152 mm
C8
Megrez II APO
Zenithstar 66 mm APO
G11/Gemini
ST8300M
Artemis285 Camera
Canon 350D DSLR

http://jthommes.com/Astro/
Posted 11/04/2008 04:15PM #4
Charles,Ivan,Jim,

Thanks guys for looking and your comments smile


Jason
Posted 11/05/2008 12:53AM #5
Nice results, and 14 hrs !!! That has got to be one of the most interesting clots of dust in the sky. Interesting processing, I think I will try some of the stuff you mention.