ICEINSPACE
|
Moon Phase
CURRENT MOON
First Quarter 50.6%
|
|
28-09-2008, 08:42 PM
|
 |
Billions and Billions ...
|
|
Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,143
|
|
|
NGC 104 (47 Tuc)
I got in a quicky (for me) on Friday night - 3.25 hours. I'm not big on globs but this one has character I think. I went wide (F5.5) and, with 5 min subs, reasonably deep. I had to supplement with some 1 min subs though to recover the burnt out core.
The glow in the bottom right is the SMC and the accompanying smaller globs are associated with the SMC. There are a few faint galaxies visible in the background too if you look hard enough.
The seeing was lousy (3 - 4 arcsec) so the stars aren't quite as tight as they should be for an 2.25 arcsec / pixel image scale. I think the overall result is reasonably pleasing though.
Small: http://upload.pbase.com/image/103785965/large
Large: http://upload.pbase.com/image/103785965/original
Cheers,
Marcus
Last edited by marc4darkskies; 29-09-2008 at 09:45 AM.
Reason: Updated broken link
|
28-09-2008, 09:17 PM
|
|
Registered User
|
|
Join Date: Sep 2006
Location: Melbourne, Victoria
Posts: 3,916
|
|
|
Not sure Marcus. Looks a little too clinical or sharpened. Globulars require good seeing as sharpening gets tricky towards the center where stellar profiles overlap. You can of course mask the effect. Try a DDP to give you an indication of what the dynamic range entails, then replicate this with levels and curves to get better control. I know you're capabile of more based on previous work.
|
28-09-2008, 09:44 PM
|
 |
Registered User
|
|
Join Date: Aug 2007
Location: Ballarat Vic
Posts: 268
|
|
|
Nice work. Good colour. I really like globs and sometimes wonder if given their relatively high surface brightness and need for really tight resolution, that a more planetary approach to imaging i.e. lots of shorter, (say 30s -2 min) exposures might not work. Just musing, definately no criticisim here. Thanks.
|
28-09-2008, 10:08 PM
|
|
Billions and Billions ...
|
|
Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,143
|
|
Quote:
Originally Posted by jase
Not sure Marcus. Looks a little too clinical or sharpened. Globulars require good seeing as sharpening gets tricky towards the center where stellar profiles overlap. You can of course mask the effect. Try a DDP to give you an indication of what the dynamic range entails, then replicate this with levels and curves to get better control. I know you're capabile of more based on previous work.
|
Hmmm, too contrasty perhaps? I haven't sharpened at all. I've deliberately made it contrasty to give the full frame impact. I've softened the inner region a little bit - any better?
Quote:
Originally Posted by winensky
Nice work. Good colour. I really like globs and sometimes wonder if given their relatively high surface brightness and need for really tight resolution, that a more planetary approach to imaging i.e. lots of shorter, (say 30s -2 min) exposures might not work. Just musing, definately no criticisim here. Thanks.
|
Thanks mate. You might be right for close-up work but for wide field you need to go deeper I think - to put something interesting in the surrounding space.
Cheers, Marcus
|
28-09-2008, 10:47 PM
|
 |
Galaxy hitchhiking guide
|
|
Join Date: Dec 2007
Location: The Shire
Posts: 8,483
|
|
Marc,
There is sooooo much great data there! But simply too much contrast....unless you are in orbit, the sky is never that black 
A couple of tweaks...beeeeaudiful!
Peter
|
29-09-2008, 12:18 AM
|
|
Billions and Billions ...
|
|
Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,143
|
|
Quote:
Originally Posted by Peter Ward
Marc,
There is sooooo much great data there! But simply too much contrast....unless you are in orbit, the sky is never that black
A couple of tweaks...beeeeaudiful!
Peter |
Thanks Peter, have a look now (same link - don't forget to refresh). Any better?? .... It hurts not to make space black
Cheers, Marcus
|
29-09-2008, 12:59 AM
|
|
Registered User
|
|
Join Date: Sep 2006
Location: Melbourne, Victoria
Posts: 3,916
|
|
|
An improvement Marcus. Didn't realise you hadn't used any form of sharpening. Nothing wrong with dark skies as "black", but a little brightness doesn't hurt. Nice work on the repro.
|
29-09-2008, 04:51 AM
|
 |
Sir Post a Lot!
|
|
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
|
|
|
Nice work Marcus, I love the gold/red stars in amongst the glob. There's a cyan hot pixel of some sort though?
|
29-09-2008, 08:09 AM
|
 |
Amongst the stars
|
|
Join Date: Jun 2006
Location: Glen Innes, N.S.W.
Posts: 2,888
|
|
Very nice Markus! beautiful star colors!
I`m happy to get stars 3-4 arc secs any old time ...
cheers
|
29-09-2008, 09:00 AM
|
 |
Moderator
|
|
Join Date: Aug 2005
Posts: 26,637
|
|
A very nice re-process Marcus, I like this version better.
Well done.
|
29-09-2008, 07:39 PM
|
|
Billions and Billions ...
|
|
Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,143
|
|
Quote:
Originally Posted by iceman
Nice work Marcus, I love the gold/red stars in amongst the glob. There's a cyan hot pixel of some sort though?
|
Thanks Mike! Nope, real blue stars but I've exaggerated the colours (of course). Look close and you'll see others.
Quote:
Originally Posted by Garyh
Very nice Markus! beautiful star colors!
I`m happy to get stars 3-4 arc secs any old time ...
cheers |
Thanks Gary. The best I've seen here (north western Sydney) is between 1 and 2 - quite rare though.
Quote:
Originally Posted by RB
A very nice re-process Marcus, I like this version better.
Well done.
|
Thanks Andrew - yes, I've got to be less zealous with the contrast for sure.
Cheers, Marcus
|
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 11:56 PM.
|
|
