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_comet_46p_winners.thumb.jpg.b3d48fd93cbd17bff31f578b27cc6f0d.jpg

Xiga

M42 - 2 hrs of Dodgy Data - Just for fun!

Recommended Posts

Posted (edited)

Like the lunatic that I am, I decided to get the scope out last week during that storm that was passing through. The skies were clear and there was no moon about, so I figured why not! Only problem was the 17-20 mph winds, lol.

I got 2 hrs of subs but had to throw away half of them due to guiding problems more so than the wind, amazingly. This was the 2nd time in a row i'd had Dec guiding problems, and that's after about 2 years of not having a single problem guiding. After the 1st hr of wasted subs, I turned off Fast Switching in Dec and chose to only Dither in RA, and the Dec problems mostly went away, at least to allow me to capture 1 hr of 'still dodgy but just about useable' subs. Once M42 disappeared behind the neighbour's roof, I then re-calibrated on the Celestial Equator (Dec 0) and when I switched to the Pinwheel Galaxy I was able to guide as normal again (with Fast Switching and Dithering in both RA and Dec both turned on again) and didn't lose any subs, despite the wind, so I've decided that from now on I won't be calibrating at the target itself, i'm always going to do it at Dec 0.

I decided to throw this in with another 1 hr of subs (plus 10 x 30s for the core) that I took back in Jan 2017 (has it really been that long?!). That hr also had issues, with some weird streaking in the lower left that I could never work out what caused it. The D5300 hadn't been modified at that stage either. So I fired it all in to APP and decided to stack it anyway, and give it a quick process. Then chose to crank it up to 11 on the colour front, just for laughs.

It won't be going on the wall anytime soon, lol, but I suppose it came out a bit better than I was expecting, all things considered.

20 x 360s with an IDAS-D1

D5300, 80ED, HEQ5-Pro.

Stacked in APP, processed in PS.

CS!

edit - I forgot to downscale it - so no pixel peeping allowed 😋

M42 v5.jpg

Edited by Xiga
  • Like 26
  • Thanks 2

Share this post


Link to post
Share on other sites

Lovely detail right down to the core Ciaran, well done!!

  • Like 1

Share this post


Link to post
Share on other sites

Beautiful and very nicely processed.  I think I'm in a very small minority but I actually prefer a slightly burnt out core which shows the dynamic range of the trapezium area but most quality images show it exactly as you have here!

  • Like 1

Share this post


Link to post
Share on other sites
6 hours ago, tooth_dr said:

Lovely detail right down to the core Ciaran, well done!!

Thanks Adam 👍

5 hours ago, michael.h.f.wilkinson said:

Very nice result indeed!

Cheers Michael 

4 hours ago, MartinB said:

Beautiful and very nicely processed.  I think I'm in a very small minority but I actually prefer a slightly burnt out core which shows the dynamic range of the trapezium area but most quality images show it exactly as you have here!

Thanks Martin. I know what you mean about the core. I too usually prefer the bright bits up there to, well, look bright! Another example is M31. I prefer a nice big core for it, rather than a small point of light. But M42 is just so darned bright that it has to be tamed. I could have gone brighter on this tbh, but it was late and I was in a hurry to just get something thrown together quick. Hopefully I can get a chance to get some proper data on this soon before it's too late. 

Share this post


Link to post
Share on other sites
Posted (edited)

I looked at this again and the detail on the brown dust between the running man and m42 is amazing. These Nikons are great 😆

Edited by tooth_dr
  • Like 1

Share this post


Link to post
Share on other sites
1 hour ago, tooth_dr said:

I looked at this again and the detail on the brown dust between the running man and m42 is amazing. These Nikons are great 😆

Lol, thanks Adam ☺️ I do love my wee D5300.

Good luck with your D800e. You'll have a cracking widefield setup once you get the Samyang 135 all set up. 

Share this post


Link to post
Share on other sites
21 hours ago, Xiga said:

I won't be calibrating at the target itself, i'm always going to do it at Dec 0.

That's definitely the way to go. I found my guiding improved with this method. Nice image too. You got some lovely star colour and detail.

  • Like 2

Share this post


Link to post
Share on other sites
1 hour ago, Allinthehead said:

That's definitely the way to go. I found my guiding improved with this method. Nice image too. You got some lovely star colour and detail.

Thanks Richard 😀

I find it amazing though that I've somehow managed to image for the last 2 years without realising this, and my guiding has always been great (0.6" - 0.9" on most nights). It's only been the last 2 sessions where I had trouble. I guess I've just been lucky! 

Share this post


Link to post
Share on other sites

Very good image Ciaran - flat background, star colours, rich dust, focus.  Very well accomplished.

  • Like 1

Share this post


Link to post
Share on other sites
21 hours ago, Barry-Wilson said:

Very good image Ciaran - flat background, star colours, rich dust, focus.  Very well accomplished.

Thanks Barry! 🙏

Share this post


Link to post
Share on other sites
5 hours ago, HenryFitz said:

Can I download these number of photo's, Ciaran?

Hi Henry 

Are you asking me to post the the raw stack? 

I don't mind sharing it (it's certainly not not anything special, lol). I'm currently away for Easter though so it would have to wait to tomorrow night 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   1 member

  • Similar Content

    • By HenryFitz
      For deep sky observations, can you make suggestion which will be more fitted with my behavior: mobility is not a big concern as a least 11" aperture is must whereupon computerized stuff is no good choice for me. 
    • By Xiga
      Hi guys
      I'm breaking the cardinal rule here of posting late at night, right after finishing PP, so let's see what sense the dawn brings! 🙃 
      I shot this in the early hrs of 29th of March. There was no moon present (i think!) and conditions were pretty good, AFAIK. 
      This is 28 x 360s, so about 2.75 hrs in total. Taken as usual with the D5300, IDAS-D1, and SW 80ED. 
      APP used for stacking and gradient reduction, everything else done in PS. 
      Would have liked twice, or 3 times, the data, but it's just not happening, so i've just decided to process what i've got. 
      Thanks for looking, and all CC welcome as always 😀

    • By Xiga
      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:


    • By MarsG76
      Image of the great Orion Nebula, M42 or NGC 1976, taken in natural color through my 8" SCT at a focal length of 2032mm using an astro modded and (the recently) cooled Canon 40D DSLR.
      Total exposure time was just 1 hour 21 minutes and 45 seconds, image consists of 15 x 15sec, 12 x 30, 60, 120 and 180 second subs at ISO1600.
    • By MarsG76
      Hello Astronomers,
      Image of the great Orion Nebula, M42 or NGC 1976, taken in natural color through my 8" SCT at a focal length of 2032mm using an astro modded and (the recently) cooled Canon 40D DSLR.
      Total exposure time was just 1 hour 21 minutes and 45 seconds, image consists of 15 x 15sec, 12 x 30, 60, 120 and 180 second subs at ISO1600.
       
      Clear Skies,
      MG

×
×
  • Create New...

Important Information

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