#1  
Old 03-04-2014, 11:06 PM
Jon's Avatar
Jon (Jonathan)
Registered User

Jon is offline
 
Join Date: Nov 2012
Location: Canberra
Posts: 558
M83

Here's another M83. 5 hours total data (150:50:50:50) from the suburbs in Canberra, Atrik 383L+ on the Meade 10" SCT at f/6.3.

Full resolution image here

Cheers

Jonathan
Attached Thumbnails
Click for full-size image (M83 smalll.jpg)
188.7 KB93 views
Reply With Quote
  #2  
Old 04-04-2014, 03:18 AM
atalas's Avatar
atalas
Registered User

atalas is offline
 
Join Date: Mar 2005
Location: Sydney
Posts: 5,151
Nice work Jonathan.
Reply With Quote
  #3  
Old 04-04-2014, 09:18 AM
strongmanmike's Avatar
strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,689
That's an excellent M83 Jon, you have structure showing in the two small galaxies on the right and you can make out the faint arm that reaches out to them below M83, a very good result, you must be happy with that I like M83 presented at this orientation too

Mike
Reply With Quote
  #4  
Old 05-04-2014, 07:00 AM
alpal's Avatar
alpal
Registered User

alpal is offline
 
Join Date: Jan 2012
Location: Melbourne
Posts: 3,784
Hi Jonathan,
That's a great M83 with lots of detail.
I hope you don't mind - I made some small changes?
The core has been sharpened slightly & I've
worked on the stars to make them smaller, softer & increased their colour.
Do you like that better?

cheers
Allan
Attached Thumbnails
Click for full-size image (M83 Southern Pinwhell Ice in Space_1_small.jpg)
191.9 KB40 views
Reply With Quote
  #5  
Old 05-04-2014, 07:43 AM
Jon's Avatar
Jon (Jonathan)
Registered User

Jon is offline
 
Join Date: Nov 2012
Location: Canberra
Posts: 558
Hi Alan,

Yes, that's great! How did you sharpen the core to make it clearer but not harsh?

Cheers

Jonathan
Reply With Quote
  #6  
Old 05-04-2014, 07:56 AM
alpal's Avatar
alpal
Registered User

alpal is offline
 
Join Date: Jan 2012
Location: Melbourne
Posts: 3,784
Quote:
Originally Posted by Jon View Post
Hi Alan,

Yes, that's great! How did you sharpen the core to make it clearer but not harsh?

Cheers

Jonathan
Hi Jonathon,
I am glad you like those small changes.
The core was the easy part.
I sharpened the whole picture at about 2 pixels on another layer.
I then placed a hide all mask on it. (black)
I then used the brush to paint over the core in the areas
I wanted sharpened using white on the mask but painting on the pic.
I then blurred the mask at about 12 pixels & adjusted opacity to suit.

cheers
Allan
Reply With Quote
  #7  
Old 05-04-2014, 08:11 AM
Jon's Avatar
Jon (Jonathan)
Registered User

Jon is offline
 
Join Date: Nov 2012
Location: Canberra
Posts: 558
Ah, ok. Sharpen at a small value then blur again at a lager value. I can see how that brings out detail but prevents the harshness I get with sharpening on its own.

Now, making the stars smaller and softer ... Tell me about thst one. Whenever I've tried it it's left rings around the stars.
Reply With Quote
  #8  
Old 05-04-2014, 08:12 AM
Astroman's Avatar
Astroman (Andrew Wall)
<><><><>

Astroman is offline
 
Join Date: Feb 2005
Location: Paralowie, South Australia
Posts: 4,367
Very nice work Jonathan, and nice processing Allan.
Reply With Quote
  #9  
Old 05-04-2014, 08:28 AM
alpal's Avatar
alpal
Registered User

alpal is offline
 
Join Date: Jan 2012
Location: Melbourne
Posts: 3,784
Quote:
Originally Posted by Jon View Post
Ah, ok. Sharpen at a small value then blur again at a lager value. I can see how that brings out detail but prevents the harshness I get with sharpening on its own.

Now, making the stars smaller and softer ... Tell me about that one. Whenever I've tried it it's left rings around the stars.
Hi Jonathon & thanks Andrew,
That's much harder & from memory:

New layer
Select colour range highlights.
Select modify - expand by 4 pixels -feather by 2 pixels.
Alt lasso to deselect the galaxy.
Ctrl M to get curves.
Ctrl H to hide.
Adjust right had side much lower.
Left hand side close to center line but slightly lower.
That will make the stars smaller.
Blur by 2 to 3 pixels - that will stop rings & soften the stars.

Flatten.
New layer
Reselect stars
Switch to LAB mode.
Increase colour with a & b sliders to equal values.
Place a show all mask on & then paint over some stars with black
to stop the brighter ones getting too much colour.
Adjust opacity.

Flatten & switch back to RGB mode.


I hope that helps?

I think I need to make some videos to add to Louie's ones here:

https://www.youtube.com/channel/UCJ5...Ge66vsuSaXb-0A

All of that comes from variations of Louie's work.

cheers
Allan
Reply With Quote
  #10  
Old 05-04-2014, 11:08 AM
Rigel003's Avatar
Rigel003 (Graeme)
Registered User

Rigel003 is offline
 
Join Date: May 2006
Location: Adelaide, South Australia
Posts: 1,082
Very nice image, Jonathon. Good detail and nice colour differentiation between the blue arms, pink HII regions, and yellow core. Interestingly the astrobin site lists a wealth of detail for every aspect of the image train and capture parameters but no mention of the scope used.
Reply With Quote
  #11  
Old 05-04-2014, 12:06 PM
Jon's Avatar
Jon (Jonathan)
Registered User

Jon is offline
 
Join Date: Nov 2012
Location: Canberra
Posts: 558
Really? I'll fix that. It is a Meade 10" SCT classic with an f/6.3 focal reducer. Perhaps not the ideal scope for this sort of stuff, but I mainly use it for photometry and spectra these days, at which it performs well. I still like to grab the odd pretty picture on clear moonless nights :-)
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 01:00 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Astrophotography Prize
Advertisement
Bintel
Advertisement