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A Late Season Swan

Started by jthommes, 09/04/2006 09:21PM
Posted 09/04/2006 09:21PM | Edited 09/04/2006 09:36PM Opening Post
This is an Ha enhanced RGB image in that the Ha data was used to construct the luminance channel in an LRGB image. I did bias slightly toward the red over my normal color calibration.

Also, based on past comments, I did this without noise reduction. (Of course this object is fairly bright and has good signal to noise.)

Full size image and exposure / processing details are here:

http://jthommes.com/Astro/M17.htm

An older imade from two years ago - made without Ha data is here:

http://jthommes.com/MiscAstro/Archives/M17.htm


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 09/04/2006 10:14PM #1
Jim,

That is an impressive shot. Thanks for sharing!

Keith

[COLOR="Navy"]“Heaven wheels above you, displaying to you her eternal glories, and still your eyes are on the ground” --Dante[/COLOR]
Posted 09/05/2006 02:23AM #2
Jim ,really nice shot ! I like the fine detail you pulled out of this and you images have there own color signature to them .

Regards


Louie  8)

www.atalas.net
Posted 09/05/2006 03:29PM #3
Jim Thommes said:
...... I did this without noise reduction. (Of course this object is fairly bright and has good signal to noise.)

I think you're right, Jim. This one didn't need noise reduction. As Gendler has written, "A little grain isn't a bad thing", but I don't see any here.
I think that you could increase your red balance even further if you wanted to, but be advised that I'm partial to 'electric' red for Ha.
My regards,

dan
Posted 09/05/2006 05:23PM #4
That is a great looking image.Very sharp details compared to your older version.
Posted 09/06/2006 03:55AM #5
Thanks guys for the comments...

Louie, Yeah, I think my "color signature" comes from my use of my old Edmund Optics Dichroic RGB's - maybe one day I will get a more professional set. I'm not unhappy with them, I'm just curious to see what I would get from a different set.

Dan, Yeah, so this one really didn't need noise reduction. My real challenge will come on that next "noisier" image - It will be hard for me to hold off on the NR.

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 09/06/2006 12:56PM #6
Excellent shot Jim! 8)

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

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