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steviemac500

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Everything posted by steviemac500

  1. Thanks everyone, I appreciate all the positive comments.
  2. This is my take on M42. It's an HDR image with a mixture of 300s and 10s in L and RGB. I also used 20mins and 10s in HA then used this to enhance the detail. Total of around 23 hours. Hope you like it! Hi res below. https://astrob.in/q734k5/0/
  3. I can never resist this target - one of the most beautiful in the sky. This my latest take on the Seven Sisters - total of 12 hrs, 6hrs of 300s in Lum and 2 each in RGB. Hi res link below. Hope you like it. https://astrob.in/ro1vs3/0/
  4. Thanks for the comments. I'm aware of the issues with the star alignment but it's only in one section of the mosaic. It's a simple fix by increasing the RNSAC tolerance - I just didn't take enough care first time round! When I add the HA I'll take a bit more care. What I am really interested in is people's thoughts on the final colour as I said above, there seems to be a conflict about blue or brown.
  5. Hi, I am interested as to people's thoughts on this. It's a 4 panel mosaic shot over several nights. Now, I know that most M31s are quite heavily blue but my data didn't have any in the galaxy but there is definitely blue in the image as its quite obvious in some of the stars. I read that in reality there are very few blue stars anyway and the more realistic colour is towards what I have here? I'm not 100% convinced but would be interested in what you think. Please ignore the pinched stars and the slight misalignment, I'm not quite finished and was going to add some HA in as well. Hi-res link below. https://astrob.in/wmpbtl/0/
  6. Yep, I see it now, can't believe I missed it but in fairness you have to look pretty hard or be looking for something anyway to see that!! I never noticed it first time round and I don't think it detracts from the image if you're not looking too hard. At a loss to explain it though as APP normally is faultless. Don't ever hesitate to offer criticism though otherwise how do we learn and this will be something I will scrutinise more in the future, Still, AN have published it so I am going to remain happy with that!
  7. Thanks for all the support. The latest edition of Astronomy Now has published the image. Well chuffed!!
  8. Thanks Dave, the camera has been recently serviced so I’m not sure it’s that. It’s only on the bigger stars too.
  9. A friend of mine has asked why there are spikes on some of the stars. I’m assuming it’s something in the processing and my money is on deconvolution but I’m not sure. Any ideas?
  10. A widefield shot of the Crescent. This is a 6 panel mosaic consisting of 5hrs in Ha and O3 in each panel giving a total integration of 60hrs. The mosaic was constructed in APP and then processed in PI minimally with a little noise reduction and then colour combined with the standard mix. I added the Ha layer back in PS to bring back some of the detail. I have attached the Ha as I like it too!! Hope you like them, C & Cs welcomed as always! https://astrob.in/mcv66q/B/ Steve
  11. Thanks for the comment. Could you explain the procedure for adding the stars in with pixel maths please?
  12. This is my last image before heading back to the cloudy skies of Scotland for a few days. Biclolour rendition - 10hrs in each of O3 and Ha. I've tried to minimalise the processing this time and used my Ha as a final layer to add back in the detail. ****No stars were harmed in the production of this image!! @wimvb the Starnet++ module is very good. I tried it on this image and the results are excellent, it just didn't suit this picture. Thanks for looking. Steve
  13. Thanks Wim, I’ll have a look at the other file later. Your mask generation is very interesting, I don’t understand it, but it’s interesting. Why the 3x3 element, everything I’ve read has said to use a 5x5? Funny, I like starless nebula images but for some reason in Cyprus, no one else does! By the way, what language is that bottom line written in and where do you go to learn it?
  14. @carastro, sorry I wasn’t being offensive, I was trying to be funny about how this post kept going round the same conversation. Morphological Transformation is usually used to dilate or erode stars. It can create a splotchy effect with the filaments present if it’s used badly, as in my image. I tend to use it to draw more attention to the nebula but I may not anymore.
  15. Personally, I’ve nothing against PS, I use it frequently for bits and pieces but most of my processing is done in PI. Could just never get to grips with PS and I even bought a book to help!!
  16. Thanks for the support guys, the learning curve as ever remains high. @Xplode, sometimes you need a shove to refocus and quit bad habits, I may lay off MT for a while . @Datalord, thanks for your help and finally @carastro, just to be clear, it was the Morphology causing the artifacts not the noise reduction, in case anyone else was wondering.
  17. Here you go. I've re tried MT and it does produce the artifacts.
  18. I’ll have a look. It’s on the other computer.
  19. It is quite bad when you pixel peep . I’ll have to have a look at the data later as it’s on the on the other computer. I may just forgo MT altogether.
  20. Yes, you’re absolutely right, they are without doubt a by product of processing. So the MT happens very late in the processing, in fact it’s usually the last thing I do. The final image is the result of only 1 iteration with MT with .20 amount and 0.75 selection. To my eye, it was the best compromise as any higher settings increased the artefacts a lot.
  21. When you say you agree with xplode, are you talking about the noise reduction causing the artefacts?
  22. Sorry, artefacts on which image?
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