Hi,
A couple of weeks ago I saw an image of the helix revealing the outer structure. I was very naive and I gave it a try, I accumulated 41 x 20m frames of Ha and the outer shell was barely noticeable!
I am sure this target is better suited for bigger apertures... I will stay away from planetary nebulas and go back to more 'generous' objects!
I always have problems color balancing bi-color images, and this is not exception.
Thanks for taking a look!
The image details are:
* Mount Atlas
* OTA Epsilon 160
* Camera Atik 460EX
* Filters Astrodon 5nm
* 41 x 20m frames Ha @ 1×1
* 12 x 20m frames OIII @ 2×2
LINK TO HIGH RES IMAGE