richyrich_one Posted February 10, 2015 Share Posted February 10, 2015 HiMy first attempt at a DSO.12 x 300 sec at ISO 800, 30 flats, no darks or bias. I'm sure my processing needs a lot of work.Constructive criticism welcome Link to comment Share on other sites More sharing options...
tingting44 Posted February 10, 2015 Share Posted February 10, 2015 wow nice for your 1st DSO! a lot better then my 1st DSO (M42)what camera did you use for capture?one thing id look at would be colour calibration as it looks a touch purple, but it might be me as I am on my rubbish work pc from the 80's lol Link to comment Share on other sites More sharing options...
richyrich_one Posted February 10, 2015 Author Share Posted February 10, 2015 wow nice for your 1st DSO! a lot better then my 1st DSO (M42)what camera did you use for capture?one thing id look at would be colour calibration as it looks a touch purple, but it might be me as I am on my rubbish work pc from the 80's lolThanks600D unmodified. Definitely too purple, consequence of trying to eek out the detail.Would I be correct in thinking a CLS filter would improve things on this type of target? Link to comment Share on other sites More sharing options...
michael.h.f.wilkinson Posted February 10, 2015 Share Posted February 10, 2015 First attempt and right into one of the hardest ones. Not bad at all. I use a CLS CCD filter and that keeps the backgrounds down a bit Link to comment Share on other sites More sharing options...
swag72 Posted February 10, 2015 Share Posted February 10, 2015 A very good first image The purple colour is very easily fixed. Look at the histogram and you will ses that it will be unbalanced. You want to move the left hand slider about in 'levels' to get the 3 colour peaks to match up. This will help in your colour.A Light Pollution filter will help massively - A good investment in my opinion. AP is all about long exposures and sadly many of us will be hampered in this endeavour by the light pollution around. Link to comment Share on other sites More sharing options...
Owmuchonomy Posted February 10, 2015 Share Posted February 10, 2015 Great first effort. The fact your 600D is unmodded means you may have better success on targets that don't rely so much on Ha (or blocking of such emissions like the horse head). As Orion is so well placed try M42. It is also a brighter target. keep posting. Link to comment Share on other sites More sharing options...
hjw Posted February 10, 2015 Share Posted February 10, 2015 That's what I call "jumping in the deep end". You know there is a brighter nebula in Orion - but hey everybody is doing this one ... Well done! Link to comment Share on other sites More sharing options...
richyrich_one Posted February 10, 2015 Author Share Posted February 10, 2015 Thanks everyone. I like to aim high (pun intended)Definitely got the bug! Must do M42, perfectly placed at the moment.I doesn't look as sharp as I would have liked, I focused using a bhatinov mask so I guess it was down to the seeing although I haven't checked the collimation recently.I had a go at the levels... Link to comment Share on other sites More sharing options...
Leveye Posted February 10, 2015 Share Posted February 10, 2015 Well done! Nice job on the re-edit. Go for more light frames and for sure you'll get more detail. Your off and running! Link to comment Share on other sites More sharing options...
alexjj67 Posted February 10, 2015 Share Posted February 10, 2015 Very nice picture. That's going to be my next target. It will be my second DSO Link to comment Share on other sites More sharing options...
zakkhogan Posted February 10, 2015 Share Posted February 10, 2015 Fantastic shot, If its not to much to ask, could i ask to see what one of the unstacked frames ?Craig Link to comment Share on other sites More sharing options...
zakkhogan Posted February 10, 2015 Share Posted February 10, 2015 Fantastic shot, If its not to much to ask, could i ask to see what one of the unstacked frames ?Craig Link to comment Share on other sites More sharing options...
JemC Posted February 10, 2015 Share Posted February 10, 2015 Wowfantastic 1st image and certainly better than my 1st attemptwell doneRegards Link to comment Share on other sites More sharing options...
richyrich_one Posted February 10, 2015 Author Share Posted February 10, 2015 Fantastic shot, If its not to much to ask, could i ask to see what one of the unstacked frames ?CraigThanks, no problem...I'm intrigued to know why though?? Link to comment Share on other sites More sharing options...
zakkhogan Posted February 10, 2015 Share Posted February 10, 2015 Thanks Rich,I ask as i was trying to image this the other week and took a few test shots to see if it was worth my while, i took a few 2min shots and got a very washed out frame with no hint of nebula. So i moved on to a different object, Its good to see what to aim for when trying to capture this, I was imagining with a 8" SCT .You have inspired me to try again Thank you Craig P.S can i ask one more thing, what is the light pollution like round your way? Link to comment Share on other sites More sharing options...
richyrich_one Posted February 10, 2015 Author Share Posted February 10, 2015 Thanks Rich,I ask as i was trying to image this the other week and took a few test shots to see if it was worth my while, i took a few 2min shots and got a very washed out frame with no hint of nebula. So i moved on to a different object, Its good to see what to aim for when trying to capture this, I was imagining with a 8" SCT .You have inspired me to try again Thank you Craig P.S can i ask one more thing, what is the light pollution like round your way?Not too bad at all here. Link to comment Share on other sites More sharing options...
ollypenrice Posted February 11, 2015 Share Posted February 11, 2015 A very good first image The purple colour is very easily fixed. Look at the histogram and you will ses that it will be unbalanced. You want to move the left hand slider about in 'levels' to get the 3 colour peaks to match up. This will help in your colour.A Light Pollution filter will help massively - A good investment in my opinion. AP is all about long exposures and sadly many of us will be hampered in this endeavour by the light pollution around.To re-stress Sara's point, look at the top left of the histogram peak in each colour channel. This is the point to line up for a starting point in colour balance.Olly Link to comment Share on other sites More sharing options...
richyrich_one Posted February 12, 2015 Author Share Posted February 12, 2015 I appreciate all the good comments but I'm not happy with the final image. It's a chronic affliction I'm afraid.Would anyone who is a bit more experienced at processing in PS mind having a go at the autosave.tif?I would like to know if it's the data or my processing that's lacking. I'm suspect it's both. I would be interested to see what an expert could do with it.May be a competition to see who can do the best edit? Any takers? https://www.dropbox.com/s/kyk48hyiihaecsh/Autosave003.tif?dl=0 Link to comment Share on other sites More sharing options...
ollypenrice Posted February 12, 2015 Share Posted February 12, 2015 Here you go. The biggest weakness in your system is a severe lack of signal in red, maybe because of an LP filter? Green was over represented and tha lack of red makes it hard to lose the magenta caste.Olly Link to comment Share on other sites More sharing options...
richyrich_one Posted February 12, 2015 Author Share Posted February 12, 2015 Autosave003Olly processing.jpgHere you go. The biggest weakness in your system is a severe lack of signal in red, maybe because of an LP filter? Green was over represented and tha lack of red makes it hard to lose the magenta caste.OllyThanks very much Olly! I really appreciate your efforts.I've been playing around with it following this tutorial http://www.askc.org/Astro_Photo%20Workshop.html and the reults were something similar to yours. But wasn't sure whether I had pushed it too far.At least now I know it's the data. Looks very noisey, more/longer exposures I presume would improve this??No filters were used just stock 600D and SW CC. The green problem I think I understand (bayer matrix has 2 green for each red and blue) The lack of red has me concerned. Interesting you suggest the reason could be a LP filter, I was thinking of ADDING a CLS filter, is this the same thing? If so i thought it would have improved things. I don't want to make things worse!Really need to look at getiing the 600D astro-modified. This hobby just keeps on taking! Link to comment Share on other sites More sharing options...
ollypenrice Posted February 12, 2015 Share Posted February 12, 2015 The target is Ha dominated but it can work well in LRGB only. This version has no dedicated Ha layer. http://ollypenrice.smugmug.com/Other/Best-of-Les-Granges/i-6shTXhn/0/X3/Horse%20HaLRGB-X3.jpg However, an astronomical red filter passes Ha freely. (What a dedicated Ha filter does is exclude other wavelengths so increasing contrast.)Modding the camera (or a camera) would certainly help.Olly Link to comment Share on other sites More sharing options...
richyrich_one Posted February 16, 2015 Author Share Posted February 16, 2015 The target is Ha dominated but it can work well in LRGB only. This version has no dedicated Ha layer. http://ollypenrice.smugmug.com/Other/Best-of-Les-Granges/i-6shTXhn/0/X3/Horse%20HaLRGB-X3.jpg However, an astronomical red filter passes Ha freely. (What a dedicated Ha filter does is exclude other wavelengths so increasing contrast.)Modding the camera (or a camera) would certainly help.OllyThanks.That's beautiful shot btw. Link to comment Share on other sites More sharing options...
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