Jump to content


Quick n dirty M45 - 3x1200 no CLS - why a halo?


Recommended Posts

I was disappointed with the images I got at Kelling because of a large halo effect around the brighter stars. I assumed this was caused by my CLS filter in front of the IR/UV nosepiece in the QHY8. So last night I dropped the filter and ran this test image. Got a nice orange sky of course, but PI got rid of that.

There is still a large halo around Alcyone though. Is this likely to be caused by the glass of the refractor, the reducer, or be an artifact from the IR/UV filter??? :(

On the plus side, it's the first time I have been able to get any decent amount of the reflection neb around M45 from home, the Borg has helped with that I think, and the long subs too.

Borg 77EDII > DGL 0.85 reducer > QHY8 - 3x1200secs >DSS>Pixinsight (levels, DBE, ABE, curves)

Crop of alcyone superstretched included to highlight the issue.





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.