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Old 16-04-2010, 01:04 PM
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M83 10.1 hours

Couple of big nights to get this data. Luckily it was clear and reasonably still on each night. I am gong to add Ha to it at some stage but for now I am reasonably content with this image.

I am looking for a method of reducing my stars in photoshop that does not include the minimum tool which I find a little too harsh, if anyone knows of a method could you please let me know.

M83

comments and criticism welcome
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  #2  
Old 16-04-2010, 01:12 PM
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renormalised (Carl)
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Excellent shot, Paul
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  #3  
Old 16-04-2010, 01:16 PM
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Paul, thats a doozy, what a shot!

thanks for sharin'

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Old 16-04-2010, 01:18 PM
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Crisp !!!
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  #5  
Old 16-04-2010, 01:31 PM
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Lovely image Paul. As for star reduction 2 methods I use with reasonable success are:
1. Images plus has a nice star and halo reduction tool.
2. Using Photoshop Min filter but before carrying out ant other action go to edit, fade min filter and adjust the slider to get a desired result.

I cannot think of any other reduction tools which work any better or in most cases work as well.
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Old 16-04-2010, 01:32 PM
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Mate, I'm constantly in awe of your work. The dedication of 10 plus hours for a start, but equally the results, awesome.
I managed 2 hours the other night, albeit only at 1200mm and was happy with what I got, until I saw this, LOL.
Keep at it.
Gary
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  #7  
Old 16-04-2010, 01:49 PM
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Hi Paul
I would only criticize the stars in this image, with the seemingly overprocessed star cores. The galaxy on the otherhad is very well done indeed.

Cheers
Martin
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Old 16-04-2010, 02:04 PM
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Paul, you make me want to give up. The time and effort you put into procuring and processing is way beyond me. Most excellent shot of my favorite galaxy.
Thats OK as I'll dabble at the edges.
Allan
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  #9  
Old 16-04-2010, 02:10 PM
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Plenty of detail & good image scale - a very nice image Paul!

I double dog dare you to add some more saturation though!

Cheers, Marcus
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Old 16-04-2010, 03:41 PM
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Quite a treat Paul. Amazing details in the arms and core of the spiral. You even got the spiral arms on the two small background galaxies. Top work and dedication.
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Old 16-04-2010, 03:44 PM
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Stunning image Paul

leon
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  #12  
Old 16-04-2010, 03:55 PM
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Quote:
Originally Posted by Paul Haese View Post
Couple of big nights to get this data. Luckily it was clear and reasonably still on each night. I am gong to add Ha to it at some stage but for now I am reasonably content with this image.

I am looking for a method of reducing my stars in photoshop that does not include the minimum tool which I find a little too harsh, if anyone knows of a method could you please let me know.

M83

comments and criticism welcome
wonderful shot Paul. Have a look at pixinsight as there is a deringing and star reduction routine in there
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Old 16-04-2010, 04:24 PM
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Another fantastic image Paul. Wow I can't believe the 8 inch RC is performing this well. You know GSO are bringing out a 12 inch and a
truss 16 inch by the end of the year. I wouldn't want to have shares in the more expensive RC companies. This is what Roland Christen has been fearing for the refractor business that China would bring out quality scopes at super low prices. A bit harder to do in the APO business but somehow they do it in the RC business which I would have thought was equally as hard.

Stars are a tad over-deconvoluted. That tutorial that Marcus linked of Ken Crawford's use of multiple levels of deconvolution is a really worthwhile tutorial. A lot of control can be gained by doing it.
A little bit more colour could be pushed in it from my viewpoint but then I like everything garish hehehe.

Greg.
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  #14  
Old 16-04-2010, 05:57 PM
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Thanks all for the comments and suggestions.

Doug I will try the fade on the min filter. I have been doing another layer and then just changing the opacity, might be worth using the method you suggested.

Gary, I thought you knew me. LOL. I am crazy enough to be out there for long durations to collect the data; and I am pretty stubborn when it comes to getting things sorted. Still a long way to go until I am totally happy with this type of imaging.

Martin, I reckon Greg got it right. Couple of those star cores are probably due to deconvolution that I did in CCD stack on the luminence layer. I spotted this late in the piece and knew someone would see it. Thanks for picking it up.

Allan, just do what I do, setup the scope and start collecting data night after night. Use exactly the same guide star each night and at the same angle. Strive for perfection (that is what I like to do all the time) but never give up.

Marcus both you and Greg have suggested that I up the saturation. Might have to give that a go then. I sort of knew I should but I was being conservative. I will remedy this as soon as possible.


David, I might have to take a look at pixinsight at some point. Thanks for the tip.

Greg GSO have promised to do a deal with me on the 12" for the promotional stuff that my images and reviews have done for their sales. Time will tell if they are serious about this offer. At any rate these scopes are nicely figured and as many can see will produce pretty reasonable images even for a hack like me.
I use Ken's deconvolution all the time now in a limited capacity on most of my images just to bring out the sharp detail. Interestingly I adapted the masking technique for nearly every aspect of my processing now, jus so that I selectively change one part of the image. I went over the top on the stars though and as I said early only realised late in the piece. Just rushing a little.

Thanks once again. Much respected.
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  #15  
Old 16-04-2010, 06:58 PM
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Ok saturation increased and stars dealt with. When I do the Ha I will blend it with the Lum to help reduce the stars.
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  #16  
Old 16-04-2010, 07:06 PM
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WOW!!!! Stunning image Paul. Glad i got to see this one.
Cheers.
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  #17  
Old 16-04-2010, 08:04 PM
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Very smick indeed Paul, insane detail, and it seems youve tweaked up the brightness from the 1st post too, it was a bit dim.

Youve also processed the outer regions nicely to keep the structure roundish, looks more natural, you often see this clipped and it becomes an awkward lop-sided shape.
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  #18  
Old 16-04-2010, 08:27 PM
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Very nice indeed
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  #19  
Old 16-04-2010, 09:28 PM
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I think you have improved some aspects of the image but I think you may have washed out a bit of the small Ha areas in the galaxy. You could try a selective saturation boost for these areas.
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  #20  
Old 16-04-2010, 09:37 PM
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Awesome
frank
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