ICEINSPACE
Moon Phase
CURRENT MOON
Waxing Crescent 21.1%
|
|

12-01-2008, 11:57 AM
|
 |
Galaxy hitchhiking guide
|
|
Join Date: Dec 2007
Location: The Shire
Posts: 8,476
|
|
Fox Fur, Cone and Hubble
Hello Group,
This one drove me spare.....Sydney's ever glowing light hub thew up gradients that made processing very difficult....hence I can't be sure of the colour fidelity.
Probably needs a re-shoot in darker skies.
http://www.atscope.com.au/BRO/images/foxneb3.jpg
STL11k, AP155 several hours of Ha, plus about an hour of colour.
Cheers
Peter
Last edited by Peter Ward; 12-01-2008 at 01:28 PM.
|

12-01-2008, 02:15 PM
|
 |
Every photon is sacred !
|
|
Join Date: Oct 2007
Location: Coonabarabran
Posts: 1,071
|
|
Not bad.... not bad at all.
I'm far from an expert and struggle with this colour balancing thing myself, but could I suggest a little more blue?
Well done.
|

12-01-2008, 02:26 PM
|
 |
Galaxy hitchhiking guide
|
|
Join Date: Dec 2007
Location: The Shire
Posts: 8,476
|
|
Jeff,
Yep...gave it a tweak with your suggestion. The blue data is a little thin and needs some more exposures.
Cheers
Peter
|

12-01-2008, 02:47 PM
|
 |
Registered User
|
|
Join Date: Apr 2006
Location: Warrnambool
Posts: 12,809
|
|
I like it a lot, very crisp and clean, great shooting Peter.
Leon
|

12-01-2008, 02:49 PM
|
 |
Sir Post a Lot!
|
|
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
|
|
Lovely image, Peter. A beautiful part of the sky, well captured.
|

12-01-2008, 04:39 PM
|
Registered User
|
|
Join Date: Jan 2005
Location: Newcastle, NSW, Australia
Posts: 4,116
|
|
Nice how Hubbles Variable Nebula is sitting up there in the darkness, well composed to get that all in like that.
Yes gradients are a hassle, particularily when they are coloured gradients, such as yellow glow from high pressure sodium lights, that makes trying to get an even neutral field difficult. I envy those at dark sites who only have natural airglow to worry about
|

12-01-2008, 06:22 PM
|
 |
Doug Edwards
|
|
Join Date: Sep 2007
Location: Brisbane
Posts: 677
|
|
I'm amazed at the results people like yourself can get from light polluted sites.
An amazing image!
|

12-01-2008, 08:41 PM
|
 |
Galaxy hitchhiking guide
|
|
Join Date: Dec 2007
Location: The Shire
Posts: 8,476
|
|
Doug,
Thanks, but anyone with a stable, accurate mount and CCD should be able to do the same. After All I only used a 6" telescope!
I've had discussions several times in the past on why *very deep* images are possible from light polluted skies, suffice to say it centers around signal and noise.
For example, DSLR's can provide simply wonderful imagery but are often limited by noise, dynamic range and QE. I own a number of DSLR's but I could not reproduce this shot with say, my Canon 5D as it would hit a sky fog limit long before I could extract any useful signal.
Under dark skies the situation is very different. I am often amazed how well DSLR's perform, and the ease with which they can be used....as they say, horses for courses
Quote:
Originally Posted by edwardsdj
I'm amazed at the results people like yourself can get from light polluted sites.
|
Last edited by Peter Ward; 12-01-2008 at 08:51 PM.
|

12-01-2008, 09:52 PM
|
 |
Support your local RFS
|
|
Join Date: May 2006
Location: Wamboin NSW
Posts: 12,405
|
|
Hi Peter, a very enjoyable image of a great area of the sky. The depth of the detail in the nebula looks great as well.
Cheers
|

12-01-2008, 10:30 PM
|
 |
Moderator
|
|
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,429
|
|
that is a wonderful shot Peter - but i am struggling to see the fox in this image ;-)
|

13-01-2008, 03:29 AM
|
Quietly watching
|
|
Join Date: Jul 2007
Location: Yarra Junction
Posts: 3,044
|
|
Quote:
Thanks, but anyone with a stable, accurate mount and CCD should be able to do the same. After All I only used a 6" telescope!
|
Ah but it wasnt a cheap one....
nice image, great depth of Ha that you just would never get with anything other than a ccd camera, just let down a bit by the jpg compression, i imagine the original to be more impressive.
its always nice to see quality imaging.
|

13-01-2008, 04:12 AM
|
 |
anatomic astronomer
|
|
Join Date: Jul 2007
Location: Linz, Austria
Posts: 372
|
|
whow Peter, that is coool!
|

13-01-2008, 08:35 AM
|
 |
Amongst the stars
|
|
Join Date: Jun 2006
Location: Glen Innes, N.S.W.
Posts: 2,888
|
|
Nice Ha data of this neb! Peter  but like you say more color data shall make it a pearler!!
you shall have to go on a trip to the country to dark skies!
cheers Gary
|

13-01-2008, 10:53 AM
|
 |
Galaxy hitchhiking guide
|
|
Join Date: Dec 2007
Location: The Shire
Posts: 8,476
|
|
Thanks guys, just as a small note, the image is a progressive .jpeg, hence depending on your internet speed, will load coarsely, then with increasing resolution. There should be few .jpeg artifacts once fully downloaded.
Yep..needs more colour data but I'm finding these overcast/late afternoon thunderstorm gradients *really* hard to work around
|

13-01-2008, 02:07 PM
|
Registered User
|
|
Join Date: Sep 2006
Location: Melbourne, Victoria
Posts: 3,916
|
|
You've highlighted the deficiencies Peter, more chrominance data etc. Still a pleasing result. Well done.
|

18-01-2008, 08:05 PM
|
 |
star-hopper
|
|
Join Date: Jun 2005
Location: Terranora
Posts: 4,406
|
|
Very impressive shot, thanks Peter.
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT +10. The time is now 05:41 PM.
|
|