Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_the_milky_way_winners.thumb.jpg.0a840852a676f881f4a849dd8099085d.jpg

jjosefsen

Advanced Members
  • Content Count

    344
  • Joined

  • Last visited

Community Reputation

208 Excellent

About jjosefsen

  • Rank
    Star Forming

Profile Information

  • Gender
    Male
  • Location
    Denmark
  1. jjosefsen

    Nebulousity around M45 - 7 hours data

    I love when an image reveals something unexpected like that.. 300 million lightyears away.. Think about it, when those photons were emitted there wasn't even really dinosaurs on earth yet, reptiles had just started to walk the earth.
  2. jjosefsen

    Nebulousity around M45 - 7 hours data

    Outstanding post @Xiga!
  3. jjosefsen

    NGC891 Take 2

    If my calculations are correct that is some serious long focal length imaging you are doing, judging by the gear used. Well done, and very interresting target!
  4. jjosefsen

    Nebulousity around M45 - 7 hours data

    I don't use Photoshop, so hopefully someone else can help you. BUT I did remember bookmarking some videos before I decided to bite the bullet and get PixInsight. https://photographingspace.com/noise-reduction-photoshop/ https://www.davemorrowphotography.com/NoiseReduction-for-NightSkyPhotography He mentions a photographing space action pack for PS, which contains some NR tools, maybe it would be easier to use that pack instead of doing it manually.
  5. jjosefsen

    Nebulousity around M45 - 7 hours data

    You use APP and Photoshop right?
  6. jjosefsen

    Nebulousity around M45 - 7 hours data

    Good point. It could use a little noise reduction in general, mostly in the background.
  7. jjosefsen

    Nebulousity around M45 - 7 hours data

    I quite like it to be honest! The framing is tight, but I think it just fits, and you captured some lovely nebulosity/dust. It will be hard not to over expose stars as bright as those.. In PI it is possible to do a HDR composite, where you combine images of different exposure lengths (example: master of x number of 5s subs, master of x number of 30s subs, master of x number of 300s subs), I don't know if this is possible in APP.. The result would be a 64bit image with high dynamic range.
  8. jjosefsen

    Dew

    I use dew heaters on refractor and guide scope, works well.. But how would you prevent dew in say a 150mm-200mm Newton reflector?
  9. jjosefsen

    Pelican Nebula - 8 hours H-alpha

    Nice looking - the DSLR data definately improved it in the end here, quite smooth! I find it hard to distinguish between the PS version and the APP version, perhaps a litle more detail in the APP version.
  10. Up and running on the Bubble Nebula, seeing is bad unfortunately.. Relative humidity is at 99% and dew heaters are running 100%.

    But it is new moon and there are no skies so have to get some RGB while I can!

     

    N.I.NA: in full swing!

    image.thumb.png.e6f63b2fe8a0e883202fa68314f4621f.png

  11. Thanks that's very nice of you. I have to say I am a little excited as well, there is definitely more to be had from better acquisition and better processing. I also find myself wondering what a faster (and better corrected) telescope could do. Exciting and expensive thoughts!
  12. Fat fingered Freddy strikes again Thanks for the correction.
  13. Thanks, it's growing on me I think..! I think there is potential for more as I learn the nuances of this camera. In particular I'm hoping I can lure some more details out of galaxies when they come around, with the smaller pixels and better resolution.
  14. jjosefsen

    Over sampling with a CMOS

    Thanks for explaining it so well! Im afraid I am very limited by my seeing, my FWHM is usually around 2.8 - 3.2 (that I can remember from memory atleast).. I often have quite high humitiy, possible because of my proximity to the coast. Bookmarking this for future reference.
  15. I decided to put this image here, as it has very much been a learning experience.. My first image with a dedicated astro camera, first time using a mono cam with filters, and first time processing a narrowband image. (Excuses out of the way now! :D) I have been pretty humbled by just how much more complex I found working with this camera (Hypercam 183m V2) compared to my trusty old DSLR. That being said I have enjoyed the challenge, and the opportunities that have arisen from it. Had I chosen the more widely used ASI1600, I feel I would probably have had an easier time getting started, as so many examples of excellent images exist with this camera. But I found I had to experiment more, which has meant a lot of "wasted data" the last month and a half. The data captured wasn't great, the Oiii data in particular was very weak and didn't contribute much.. Im going to try upping the gain for narrowband the next time and see how that goes. Still I think the result has turned out ok, despite me not spending too much time processing it. Most of the time was spent experimenting with ways to combine, when to combine it, and how to avoid noise overload when combining. Link to Astrobin for more details Thanks for looking, and CC is always welcome!
×

Important Information

By using this site, you agree to our Terms of Use.