Author Topic: M3 HDR Composition  (Read 1650 times)

Offline Ken Pendlebury

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M3 HDR Composition
« on: 2010 May 04 19:52:17 »
Hi folks,

Thought I would share this composition of M3 I put together from data captured last Sunday.  It consists of 5m x 12 (for the base) and then is composed of 150s x 10; 60s x10; 30s x 10 and 10s x10 in order to keep the core resolved and still be able to see some of the less prominent stars in the most distant parts of the cluster. 

Basic Process (have not deviated too far from Harry's tutorials  :P):
- DBE
- Color Correction
- SCNR (Green)
- Stretch
- HDR Wavelets
- Deconvolution
- ACDNR
- Color Saturation
- Final color tweaks

Of note: 
First time I never had to leave PI from calibration to finish!  Awesome!  All of my bias and flat frames were done within PI.

Issue:
On the wide field image, I have a gradient I cannot tame in the lower right hand corner.  DBE and flats tamed a good deal of the vignetting, but that last spot is left over.  Anyone have any ideas on "tidying up" issues like this?

Wide Field:
http://www.flickr.com/photos/kenastro/4576942681/sizes/o/

Crop:
http://www.flickr.com/photos/kenastro/4576942309/sizes/o/

Equipment and Exposure Details:
http://www.flickr.com/photos/kenastro/4576942681/

Comments and criticism welcome:


Regards,
Ken
Regards,
Ken
My Astro Photo Stream
http://www.flickr.com/photos/kenastro/

Offline Nocturnal

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Re: M3 HDR Composition
« Reply #1 on: 2010 May 04 21:03:54 »
Looks great Ken. Whatever minor gradients remain aren't bothersome to me.
Best,

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Offline Harry page

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Re: M3 HDR Composition
« Reply #2 on: 2010 May 05 13:33:07 »
Hi

I can hardley see the gradient  8)

But its not always possible to remove all gradients with one run on DBE , so run it again a second time should clear it up  O:)

Nice pic though  ;D

Harry
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