SlimPaling Posted January 26, 2018 Share Posted January 26, 2018 After dodging endless nights of thick clouds and rain for the last few weeks I have managed to get some of the longest duration subs that I have done so far to see how my system copes. The attached image is of IC 443 .. "The Jellyfish Nebula" ... images being taken over three widely spaced evenings. I managed to get 12 x 1200 sec CLS subs and 7 x 300 sec RGB subs. The subs were calibrated and stacked in MaximDL and processed in Photoshop. I have to spend quite a lot of time trying to control the overpowering bloating of the large star at the bottom of the image (Eta Geminorum) but this is the best that I could get so far. My night sky here in Nottinghamshire is not good at the best of times but I am reasonably happy with my results so far. Any suggestions that will help me produce clearer images in the future would be welcomed as always :-) Mike Link to comment Share on other sites More sharing options...
SimonS Posted January 26, 2018 Share Posted January 26, 2018 Very nice image! Love the detail you have captured Link to comment Share on other sites More sharing options...
alacant Posted January 26, 2018 Share Posted January 26, 2018 Hi. Excellent shot. I think all poor weather imagers deserve an enormous pat on the back. 26 minutes ago, SlimPaling said: help me produce clearer images The only thing I can think of (very much non-expert) is that there's a lot of information missing. It's as if you've cut the histogram in half by setting black in the middle of the data. I think with the other half intact, you'd have more detail. HTH. Link to comment Share on other sites More sharing options...
LightBucket Posted January 26, 2018 Share Posted January 26, 2018 Yes, very good image but the backgraound is too black, it has been clipped I think too.... maybe you had to do,this to calm the bright stars down a bit...? Link to comment Share on other sites More sharing options...
Adam J Posted January 26, 2018 Share Posted January 26, 2018 Yep as others have said you clipped the background and lost detail. I have never tried this but am told its a faint object. Link to comment Share on other sites More sharing options...
SlimPaling Posted January 26, 2018 Author Share Posted January 26, 2018 Hi ... what you have all said is interesting. I must admit I wasn't taking a lot of notice of the histogram when I was trying to get the star bloat of Eta Geminorum under some sort of control. Looking back at a previous processing effort (see attached) I can see that the histogram is not clipped so badly .... but Eta Geminorum is over powering :-( That's when I started to "play" with things. I have lost track on what I did after this to cause the histogram to be so clipped. Mike Link to comment Share on other sites More sharing options...
SlimPaling Posted January 26, 2018 Author Share Posted January 26, 2018 By doing a bit of "cutting & pasting" I have now combined the best of two versions and managed to retain the unclipped histogram (see below) .... I think this version is as good as I am going to get it .... for the time being anyway Mike Link to comment Share on other sites More sharing options...
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