Jump to content


Crescent nebula

Recommended Posts

Hi all, here's my image of NGC 6888 the Crescent nebula. This 7 hours of 5 minute subs finished on Saturday night using a zwo 294 mc pro and the optolong L extreme filter. I've started spending a bit more time on polar alignment with the asi air pro and getting it down to just a few arc seconds which does seem to improve the guiding to around 0.6 on average though never seems to get any better than that. I think the image lacks a little bit of contrast which maybe down to no astronomical darkness but even though conditions could be better I don't like to pass up a clear night ! The files have been stacked in astro pixel processor and processed in pixinsight and photoshop. 

Cheers Paul

Crescent forums V1 (1 of 1).jpg

  • Like 13
Link to comment
Share on other sites

42 minutes ago, Graeme said:

That's a lot of detail Paul. 7 hours really makes a difference. I shot the same target with the same camera the night before you did but only for 2 hours!



Thanks Graeme, yes 7 hours definitely brings out the OIII

Link to comment
Share on other sites

6 minutes ago, The Lazy Astronomer said:

Lovely delicate Oiii around the crescent showing quite nicely, plus you've got the soap bubble visible in the bottom right too. The only thing is the stars are quite funky - did you use Topaz denoise by any chance?

Thanks you yes the OIII has come through nicely & I must admit I'd not even seen the soap bubble bottom right. Regarding the stars I'm pretty sure it's because I was too aggressive with the morphological transformation tool in pixinsight . 👍

Link to comment
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

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.