Hi all, few weeks after I posted my image of Omega Centauri I got a chance to process the fits I took on the second largest globular of the sky, 47 Tuc. The link:
Here again I opted for a long exposure (mostly in luminance) to have enough s/n to stretch a see how large was the external halo of the cluster. To my surprise it turned out to be similar if no bigger than Omega centauri itself, imaged here with the same setup, scale and similar exposure data and stretching..
However this is another incredible object both photographically and visually, a real beauty of the sky!
About 10 hours of accumulated light, details on the image page..
Yeh wow looks great Marco, lovely handling of the stars in this very difficult to process object nearly 7hrs of Luminance huh? amazing!
Something looks a little strange though, there is a distinct glow in the background between the glob stars in a distinct circle shape but this glow seems to abruptly finish and then the outer area of the image has a dark sky between the stars Do you understand what I am saying? While this makes the glob look bigger, is it real?
Beautiful work Marco, always a pleasure to view them.
Thanks Mike, happy you liked it!
Quote:
Originally Posted by Larryp
Lovely image, Marco
Lanks Larry!
Quote:
Originally Posted by atalas
Marco,what a wonderful job you've done on this glob!I find It shows the excitement I feel at the eyepiece at a dark site!only better.
Thanks Louie, I have also printed in my mind the incredible visual feast this globular is, happy got the the feeling on silicon
Quote:
Originally Posted by Andy01
Wow! That's a cracker, stunning detail
Thanks Andy!
Quote:
Originally Posted by alpal
Wow - that's one of the best Tuc 47s that I've seen.
Thanks Alpal
Quote:
Originally Posted by strongmanmike
Yeh wow looks great Marco, lovely handling of the stars in this very difficult to process object nearly 7hrs of Luminance huh? amazing!
Something looks a little strange though, there is a distinct glow in the background between the glob stars in a distinct circle shape but this glow seems to abruptly finish and then the outer area of the image has a dark sky between the stars Do you understand what I am saying? While this makes the glob look bigger, is it real?
Mike
Hi Mike, well, mmm I don't get you this time mate. I cannot see any glow, halo or whatever you are talking about. There is still some chroma to be removed on the background that is not in the center (with much higher s/n) that *may* give a strange perception (I didn't remove the chroma noise from the background), apart from that, cannot see any "distinct circle shape" that "abruptly finish"..
I believe what you refer to is indeed the chroma noise of background that is "covered" by the higher brightness and s/n of the globular cluster..
Can you elaborate a bit better?
There is still some chroma to be removed on the background that is not in the center (with much higher s/n) that *may* give a strange perception (I didn't remove the chroma noise from the background), apart from that - I believe what you refer to is indeed the chroma noise of background that is "covered" by the higher brightness and s/n of the globular cluster..
Ah huh, that may well be it
Sorry to pick on your globular clusters lately you know I love ya work both times I pointed out pretty minor observations anyway, see?..I just get bored saying all the brilliant comments all the time ...have to pick on the finer points occasionally.. just to keep it real
Sorry to pick on your globular clusters lately you know I love ya work both times I pointed out pretty minor observations anyway, see?..I just get bored saying all the brilliant comments all the time ...have to pick on the finer points occasionally.. just to keep it real
Mike
Hi Mike, no worries, I am happy to get critical feedback since they point out aspects on the image otherwise overlooked.. one improves if he gets critics, not only appraisals
I will check closely the image as I have a chance and see what you (and another mate but seems his post disappeared) are pointing out. I will be away few days for a biz trip so need to do that later on
Thanks anyway for the comments
Quote:
Originally Posted by bigjoe
Showed this and some of Mike's to friends after showing them it in a 10" sct (which they loved).
They all said WOW!
Great work Marco
Bigjoe
Thanks BigJoe
Quote:
Originally Posted by Shiraz
Another beautiful image Marco - stunning. regards Ray
Do you understand what I am saying? While this makes the glob look bigger, is it real?
I don't get you this time mate. I cannot see any glow, halo or whatever you are talking about. There is still some chroma to be removed on the background that is not in the center (with much higher s/n) that *may* give a strange perception (I didn't remove the chroma noise from the background), apart from that, cannot see any "distinct circle shape" that "abruptly finish".. 
you know I love ya work 
both times I pointed out pretty minor observations anyway, see?..I just get bored saying all the brilliant comments all the time 
...have to pick on the finer points occasionally.. just to keep it real 
