skye at night Posted September 30, 2009 Share Posted September 30, 2009 Hello,was going to post this in the imaging help area, but it seems to be overflowing with 'M31 help needed images'!!Besides.. I know the issues.. It needs better data and a stable processing package (testing pixinsight but not playing ball) and more skill and patience.Pretty much just a stack of 14 images totaling only 10 minutes...Canon with 135mm f/2 lens @ f4ThanksSteve Link to comment Share on other sites More sharing options...
JCJC Posted September 30, 2009 Share Posted September 30, 2009 That's very nice Steve.........it's nice to see M31 in context.Had a go myself with a very similar setup M31.Looks a tad purple to me, could be my monitor though.Jordan Link to comment Share on other sites More sharing options...
Tim Posted September 30, 2009 Share Posted September 30, 2009 It's not bad for 10 mins, the colour balance is odd though, a bit purpley as suggested.Pixinsight will get rid of that vignetting, and you can set it to end up with a neutral background. You can try using the Dark Structure enhance routine to bring out the dark lanes a bit. Crop the pic first to get rid of the overlap features else it wont be able to deal effectively.Actually, that isn't far from how I saw it in the eyepiece at Kelling. Link to comment Share on other sites More sharing options...
skye at night Posted September 30, 2009 Author Share Posted September 30, 2009 HelloWas supposed to be a test shot for pixinsight, but just not working on my mac...The purpley is just due to lack of darks and flats I think..longest exposure was 40 secs.Steve Link to comment Share on other sites More sharing options...
Beyond_Vision Posted September 30, 2009 Share Posted September 30, 2009 The purple is down to the colour balance darks and flats will not effect it. James is running Pix-Insight on a Mac and as far as I know has no troubles. Link to comment Share on other sites More sharing options...
Tim Posted September 30, 2009 Share Posted September 30, 2009 ahhhh, you said the M word.........Flats will get rid of the vignetting, and darks will get rid of any hot pixels/amp glow effects.How do the individual shots look? Do they have the purple cast? I would think it is likely caused by not having the colour channels matched in the stack, and then emphasized in the stretching. Its very easy to fix that.That fast lens has really done the business in 40 seconds. When you say "the longest exposure", do they vary much? You will likely get better results from using same length subs in one stack, else you end up with an averaged image between the weakest and the strongest. Link to comment Share on other sites More sharing options...
skye at night Posted September 30, 2009 Author Share Posted September 30, 2009 all were manually controlled so approx 40 secs.. stacking may have introduced colour...pixinsight does not seem to agree with me or my computers....so going off it rapidly...Only got older version of PS which does not have curves so limited..So was looking at pixinsight...May have to give astroart and a couple of other s alook at on my wifes work laptop.Steve Link to comment Share on other sites More sharing options...
harry page Posted September 30, 2009 Share Posted September 30, 2009 Hi Stevei was having a quick look at your intergration problem and see Pixinsight will only stack FITS images:confused:So you will have to either create these ( not sure which camera you have ) or convert to Fits , which you can do in Pixinsight.You really want to avoid jpegs untill you are finished processing.I do not use Jpegs until I want to load them into the webGood luckHarry Link to comment Share on other sites More sharing options...
skye at night Posted September 30, 2009 Author Share Posted September 30, 2009 Harry..I am just in the process of testing that out. so glad you have confirmed...I had to transfer the images from one computer to another that had the software so had for various reasons to do as jpg.going to see what I can do then in pixinsight and nebulosity..I am using a Canon 20DathanksSteve Link to comment Share on other sites More sharing options...
Tim Posted September 30, 2009 Share Posted September 30, 2009 Steve, I had a quick play in PI and PS, just using the jpeg as posted. It should give you an idea of what is possible with that set of data, but much better from raw files to fits obviously. Link to comment Share on other sites More sharing options...
skye at night Posted September 30, 2009 Author Share Posted September 30, 2009 Yep..Thats what I was trying to do..I know the jpeg issue, but wasnt too bothered as the exercise was to evaluate pixinsight..Going a bit more to plan now.Thanks All !!!!Steve Link to comment Share on other sites More sharing options...
Tim Posted September 30, 2009 Share Posted September 30, 2009 That used Automatic background extraction. Fast and dirty and the results vary. It has left a ring as you can see. There is more control with the dynamic extraction Link to comment Share on other sites More sharing options...
themos Posted September 30, 2009 Share Posted September 30, 2009 Nice to see Mu and Nu Andromeda in the field. Link to comment Share on other sites More sharing options...
Cloudwatcher Posted September 30, 2009 Share Posted September 30, 2009 Hi Steve. Does your early version of Photoshop on the Mac have the Magic Wand/Quick Selection Tool? If so you could isolate the galaxy with the Quick selection tool set on Auto-Enhance then use the Colour Balance tool to change the colour to suit your taste. The Saturation tool also helps............ this is a quick ten minuet job just as an illustration and probably not to everyones taste. Link to comment Share on other sites More sharing options...
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