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.

Backyard Space Dude

NGC6888 - The Crescent Nebula in HOO

Recommended Posts

Hi everyone! Managed to capture 9hrs Ha and 11hrs Oiii (7nm) on this one.


SW 80ED DS-Pro
ZWO ASI1600MM Pro
SW NEQ6 Pro
ZWO ASIAir Pro
SiriL
StarNet++
Adobe Photoshop CC

Thanks for looking!

50348289211_c7f76c263b_o.jpg

  • Like 36

Share this post


Link to post
Share on other sites

Just zoomed in on the Crescent and the detail is amazing. Excellent image.

  • Like 3

Share this post


Link to post
Share on other sites

Wow, about as good as it gets on this Nebula

striking detail and colors, the O3 really makes this pop, almost 3d,

well done 

Paul

 

  • Like 1

Share this post


Link to post
Share on other sites

Stunning, as good as any I have ever seen of this target.

Alan

  • Like 1

Share this post


Link to post
Share on other sites

Very nice...   and you've also just got the top of the Soap Bubble at bottom middle

Dave

Edited by Laurin Dave
  • Like 1

Share this post


Link to post
Share on other sites

That's an absolutely incredible image! Well done. Best I've seen of the crescent 

  • Like 1

Share this post


Link to post
Share on other sites

Awesome job.  It is the best that I can recall seeing of this nebula.  

  • Like 1

Share this post


Link to post
Share on other sites

Wow, I honestly wasn't expecting this response! Thank you all so very much for your kind words. 

7 hours ago, steppenwolf said:

Lovely 3D looking image - really like this!

Thank you Steve, it all started with your book so I'm a little star-struck knowing you liked my image!

 

4 hours ago, Laurin Dave said:

Very nice...   and you've also just got the top of the Soap Bubble at bottom middle

Dave

Yes, haha I totally forgot it was there until I started post-processing, then was gutted that I didn't frame it better! 

  • Like 3

Share this post


Link to post
Share on other sites

Very very impressive! And with an ED80 :icon_salut:

  • Like 1

Share this post


Link to post
Share on other sites

A very rare beautiful photo. Rich of details and shadows. Excellent postprocessing.

Would you mind share more details on the imaging and postprocessing?

  • Like 1

Share this post


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

A very rare beautiful photo. Rich of details and shadows. Excellent postprocessing.

Would you mind share more details on the imaging and postprocessing?

Thank you! This is the basic process as I remember it:

Captured data over 5 nights in September from my back garden in a Bortle 4 zone (borderline 5).

Fully calibrated and combined in SiriL,

Simple stretch in Photoshop,

Exported and run through StarNet++,

Each channel into Photoshop for stretching, spot healing any star residue, curves, noise reduction (combination of Topaz Labs DeNoise and Astronomy Tools), smart sharpening,

Combination of the HOO palette,

Some changes to hue and saturation, further sharpening of the Oiii using masks,

Reduced the star size separately (still haven't fully got the hang of this as you can see some really bad artefacts when zoomed in) before adding them in and reducing them further to taste,

Spend hours pondering over what to do next, sleep on it, post it the next morning!

  • Like 1

Share this post


Link to post
Share on other sites

I cant stop looking at this, its mental! 😊

  • Like 1

Share this post


Link to post
Share on other sites
On 17/09/2020 at 22:51, Backyard Space Dude said:

Thank you! This is the basic process as I remember it:

Captured data over 5 nights in September from my back garden in a Bortle 4 zone (borderline 5).

Fully calibrated and combined in SiriL,

Simple stretch in Photoshop,

Exported and run through StarNet++,

Each channel into Photoshop for stretching, spot healing any star residue, curves, noise reduction (combination of Topaz Labs DeNoise and Astronomy Tools), smart sharpening,

Combination of the HOO palette,

Some changes to hue and saturation, further sharpening of the Oiii using masks,

Reduced the star size separately (still haven't fully got the hang of this as you can see some really bad artefacts when zoomed in) before adding them in and reducing them further to taste,

Spend hours pondering over what to do next, sleep on it, post it the next morning!

Many thanks! What about the imaging? I mean gain, time of the single light? I apologize for these questions but I'm used to compare with h my usual data and try to understand where I can improve

  • Like 1

Share this post


Link to post
Share on other sites
On 18/09/2020 at 22:17, GiorgioF said:

Many thanks! What about the imaging? I mean gain, time of the single light? I apologize for these questions but I'm used to compare with h my usual data and try to understand where I can improve

No problem at all! Gain 139, temp -20. 600s exposures. 

  • Thanks 1

Share this post


Link to post
Share on other sites

At first glance, its pretty good! Especially the crescent.

However :)  (lol) being the pixel peeper I am, ive had a real close look at it and maybe there is something up with the way the image has been saved off because there is quite a lot of pixelisation going on in the surrounding neubulosity:

Capture4.JPG.08b486d72dfc2fc27ddd8727e6c3870e.JPG

Probably an easy fix, just have a fiddle with the export settings or try a .png file to see if that makes any difference. If its present in the .tiff file, it may be caused by a noise reduction routine somewhere along the processing workflow.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

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