Rezn8 Posted March 19, 2013 Share Posted March 19, 2013 Hi All...Meade 115mm APO + flattener, EOS60Da, CGEM, PHD, BackyardEOS, lousy editing in PSshot from city balcony over last two nights66 x 5min subs @ 400ISO 300sec31 x DarksCroppedLink to full image if anyone wants to try at editing.https://dl.dropbox.com/u/50035099/M83%20Edit%201.tif Link to comment Share on other sites More sharing options...
billhinge Posted March 19, 2013 Share Posted March 19, 2013 HiDone in pixinsight, mainly just histogram and curves with a range mask and the dark structure enhance script (perhaps may look too red on some monitors?) Link to comment Share on other sites More sharing options...
Cloudwatcher Posted March 19, 2013 Share Posted March 19, 2013 A quick lunch time tweak in Photoshop. Link to comment Share on other sites More sharing options...
Rezn8 Posted March 20, 2013 Author Share Posted March 20, 2013 Thanks guys, shows me what to work towards. Link to comment Share on other sites More sharing options...
astrosathya Posted March 21, 2013 Share Posted March 21, 2013 One of the images is too red and grainy, while the other looks like the optics fogged up. Is it my PC showing these effects? Either case the background sky is too black.. Link to comment Share on other sites More sharing options...
Cloudwatcher Posted March 21, 2013 Share Posted March 21, 2013 Did a bit more work on your image using the Dodge and Burn tools in Photoshop to enhance the detail in the galaxy also adding Photo Filters to saturate. The star background still needs attention but I think the main subject is looking better.......purely subjective off course..... Link to comment Share on other sites More sharing options...
lensman57 Posted March 21, 2013 Share Posted March 21, 2013 Hi All...Meade 115mm APO + flattener, EOS60Da, CGEM, PHD, BackyardEOS, lousy editing in PSshot from city balcony over last two nights66 x 5min subs @ 400ISO 300sec31 x DarksCroppedLink to full image if anyone wants to try at editing.https://dl.dropbox.c.../M83 Edit 1.tifHi,I am a novice just trying to learn how to start doing some DSO imaging from a light polluted back garden, so I hope you don't mind my having a go at your capture. I did this in CS2 as an exercise for imaging M42 with a Canon 1000d and an SW100 ed. I used your original file to create a mask and stretch the final image. There is not much I could do with the core and some of the delicate detail in the arms as the core is bleached out but as a whole I am happy with it and I hope that you are too. Many thanks for posting a great image.regards,A.G Link to comment Share on other sites More sharing options...
Rezn8 Posted March 22, 2013 Author Share Posted March 22, 2013 Wow, thanks for all the input guys. Link to comment Share on other sites More sharing options...
Jannis Posted March 22, 2013 Share Posted March 22, 2013 Did a bit more work on your image using the Dodge and Burn tools in Photoshop to enhance the detail in the galaxy also adding Photo Filters to saturate. The star background still needs attention but I think the main subject is looking better.......purely subjective off course..... I've seen how you correct color balance and make almost any pic look much better in no time like it's a childs play, and i guess it probably is too if i only knew how you did it so well.If you would be able to record a video of how you do it in photoshop i'd (and probably many others too) would be extremly happy. I've seen a few tutorials on it, but still haven't really been able to do it very well... Link to comment Share on other sites More sharing options...
ollypenrice Posted March 22, 2013 Share Posted March 22, 2013 One glance at the image tells us that nothing useful can be done with it, not because it is necessarily a bad image but because most of it has been thrown away and simply isn't there to be worked on. Look at the histogram in Levels.The image is massively black clipped. The histogram peak which we see jammed over the to the left should have the mirror image of itself visible on the left as well. Half the useful data you captured is in that discarded section and is lost. A healthy histogram should look like this;*Here the entire peak is visible with a safety margin of faint data to the left as well. This means the image has retained and incorporated all the useful data captured. It is absolutely vital never to clip out any of the main peak because that is your image.Any attempt to lighten the background sky or pull out fainter signal on the clipped image, using whatever programmes you like, will be pure invention because the data simply isn't there. I'd suggest you go back and restretch the image taking care not to black clip it. If you are fighting LP black clipping may be temptiong but it is not the way. DBE in Pixinsight will be your best bet.OllyEdit; Note that on galaxy images the left hand side of the peak does usually rise very steeply because there is either background sky or bright galaxy and not that much in between. On an extended bright nebula the peak will rise more smoothly and gently since there is a lot of nebulosity just a little brighter than the background. Link to comment Share on other sites More sharing options...
ollypenrice Posted March 22, 2013 Share Posted March 22, 2013 PS, What I realize I should have done was show the effect of black clipping on the Leo Triplet image. This is how it would look;Jet black sky and no faint signal around the galaxies. Absolutely nothing can now be done to recover the lost details.Olly Link to comment Share on other sites More sharing options...
Rezn8 Posted March 25, 2013 Author Share Posted March 25, 2013 Thanks Olly, will give it a go. Link to comment Share on other sites More sharing options...
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