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Xiga

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Xiga last won the day on October 9 2018

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About Xiga

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    https://www.flickr.com/photos/32169902@N00/sets/72157674925075376

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    Northern Ireland
  1. Thanks Paul! I've amended the OP now, but I used AstroPixelProcessor for stacking and gradient reduction, and PS for everything else. I started out doing Narrowband, then only later did I start to do a few true colour images, so natural colour processing is something I've had to gradually get better at over time. I now know that until APP adds colour-preserving stretching (due soon I believe) then it's not sufficient to simply start from a DDP stretched image. Most of the colour has been washed out by that stage. So what i do at the moment is work on 2 separate stacks. One, I stretch manually in PS using sharkmelley's excellent arcsinh colour stretching method. I use this one for colour only. I can then add in a DDP stretched image (or my own stretched one) for Luminosity. This gives the best of both worlds, but the key is to get the background to roughly the same level beforehand.
  2. Thanks mate. The small amount of data went further than I thought it could tbh. Thanks Adam! Cheers Kirk! I also love these targets so I look forward to seeing your version
  3. Hey guys So with no new data at hand (or on the horizon it would seem) i decided to go back and re-process my short stack of M81 & M82, being the glutton for punishment that i am! The last time i re-processed this was about a year ago, so i was curious to see if i could get any more out of it. It's hideously low on data (nothing new there!), this is just 9 x 600s of colour (with an IDAS-D1) together with 7 x 1200s of Ha (which i only used to Lighten the Reds in the Ha jets of M82 and the small spiral regions of M81). AstroPixelProcessor used for stacking and gradient reduction, and PS for everything else. I mistakenly shot the colour at ISO 800, instead of the usual 200 i always use. A mistake i imagine every DSLR user has made before! And i have to say i really noticed it during processing. There was noticeably less colour in the stars. That being said, i was still able to bring out more colour in the core of M81 this time. And i think M82 looks a bit better as well, it was definitely over-sharpened before. I really love these targets, but they just make me wish i had more reach! CS! Here is the original thread: And here's the new one, including a cropped version:
  4. That's strange, 20 is quite a high setting but i can still see quite a lot of Color noise throughout. When i applied just 15 to the jpg it seemed to make a much bigger difference than what i'm seeing in your version above. I was going to suggest that it must be down to the mask that you applied (i would guess it was quite a strong one) but then you said you applied it to the whole image first, before then doing it a 2nd time on the masked areas, so something isn't quite working as it should. I've shown below a tight crop of a small section which shows the difference in Colour Noise between your V2 image, and one i edited myself based on the original image and applying a Colour NR setting of just 15. In hindsight perhaps 15 is a tad too high, but it shows that you are definitely doing something different with the filter than i am: Do your settings look like this? Also note, Colour NR is different to Lum NR. The Colour Noise exists pretty much throughout the whole image, not just the darkest areas, so it needs done almost everywhere (although you may still need a light mask in a few areas). Lum NR on the other hand will need a much more careful mask, so as to not ruin the sharp detail in all the bright areas (of which there are a lot in M42).
  5. Nice one Adam, it looks great! As you say, the green cast (most noticeable in the core) is now gone. ps - I would still be tempted to apply a small amount of Color NR if it were me. But then everyone's tolerance for such things are different, so please feel free to ignore me at will
  6. Xiga

    A Bonus M101

    Good choice ordering it with the belt mod pre-installed! If the option had been there when i bought mine some 5 years ago now, i would have done the same myself. The IDAS should allow you to get your feet wet with the brighter objects, but don't forget you are going to need a good software solution for gradient reduction (GradientxTerminator, AstroPixelProcessor, etc). Having to deal with high levels of LP, be prepared for the urge to modify the camera and get an Ha filter to bite sooner than you might think. Thanks Marmo720!
  7. I wouldn't worry too much about future proofing for now. Just get the one that best suits your skies as they are now. It could still take the council years to convert all the streetlights over to Led, and in any case, should you need to replace the filter, you can always sell it on for 2/3 - 3/4 of the RRP. If you can find one on the 2nd hand market, then even better. I got lucky with mine on ABS for around £100.
  8. Here you go Ryan: This is a single 480s sub of the Pacman Nebula from my D5300 using an IDAS-D1. The camera was unmodded at the time. The sub has been calibrated with Bias and Flats. Note, this one was taken from LP hell - Class 8 Bortle, Mag 18.7: https://1drv.ms/u/s!AhhWC3D3zU7BpGWvXnFQoMB809dE And here is another. This one is a single 360s sub (again calibrated) of M42, using the IDAS-D1 and before i got the camera modified. The main difference with this one compared to the one above, is that this one was taken form darker skies, Class 4 Bortle, Mag 20.5: https://1drv.ms/u/s!AhhWC3D3zU7BpGdDVQWCk3PGmLmK HTH.
  9. Gorgeous, rich, and so much detail. Marvelous stuff as always Barry! It was fun spotting all the animals! My fav has always been the 'Leeping Leopard'. Or is it a 'Crouching Cheetah'?
  10. That's a gorgeous M42 Adam, well done! The amount of dust on show is unreal, it really looks the part. The dual rig is paying off big time. Even with the rubbish winter we've had, you've still managed to get 13 hrs on this, which is no mean feat! (i could only manage 1 hr ) Just to add to Barry's and Goran's CC above, i also agree that the dust near the bottom could take a bit more contrast enhancement. The signal in this area is so strong, that you can push it a lot more than is normally the case. The added benefit will be that it should add more depth, and give the image a bit more of a 3D feel to it. Of course, as Goran says, you will need to use a mask to make sure the darker areas of the image are left unaffected. I also see a bit of a green tint, albeit subtle. If you run HLVG on a Colour layer in PS you should see an improvement (i tested it in PS and it definitely helps). I also think a smidge of Color NR would help too. If you use the Camera Raw filter you can apply a small amount (~15) of Color NR only (note, NOT Luminance) and it will help clean up some of the colour noise. Cracking image
  11. Now that's what i call dusty! I really like the separation you've managed to isolate in the dust below the HH itself. This is one of those objects that you get used to seeing in the same orientation all the time. So i'm automatically conditioned to like the landscape version, but for some reason that my brain can't quite fathom, i find myself being strangely drawn to the portrait version. Excellent work as always Richard
  12. Xiga

    A Bonus M101

    Thanks Richard The HEQ5-Pro is a great mount. I'm more than happy with mine, and regularly shoot 1200s subs, so I'm sure it will serve you well. I've also done the Rowan belt mod, but that's a project for much later down the road. If you're interested in shooting emission nebulae, then the modification will be essential. But you can start out on other targets (galaxies, globulars, reflection nebulae, open clusters) to begin with.
  13. Xiga

    A Bonus M101

    Thanks Phil. Good luck with your imaging, the D5300 and 80ED make for a nice combo. If you need to get the camera modified, i highly recommend JTW Astronomy. Thanks Barry!
  14. Xiga

    A Bonus M101

    Thanks Adam Looking at it again, I wonder should I have stretched the stars a bit more? In processing this one, I came to realise that I've been over-stretching the stars in most of my images to date. So I deliberately backed off a fair bit on this one. So now i'm not sure if they are ok, or could do with a bit 'more'?
  15. Xiga

    A Bonus M101

    Thanks for that! I'm actually pleasantly surprised that my version is not a million miles off of that, lol. Probably more like 1,000km
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