Hi all,
Sharing my first attempt at combining Ha and OIII data for the Helix. I am hoping to also add NII data in the coming weeks to put together a tri-colour image.
Acquisition details:
CFF 105mm at f/4.5 (with Riccardi reducer)
30 hours of OIII
38.5 hours of Ha
A link to Astrobin:
https://www.astrobin.com/full/362928/0/?nc=user
Version with a touch of noise reduction:
https://www.astrobin.com/full/362928/B/
Third version with a more aggressive histogram stretch:
https://www.astrobin.com/full/362928/D/?nc=user
This is my first planetary nebula, so colours and processing certainly need refinement.
Thank you for looking
Suavi