Hello to all:
This Helix nebula, also realised with the filters of narrow band, Nii, Ha and Oiii, with 6 frames of 480 seconds by each filter, and combined like RGB in that order.
Hopefully it is of his interest, and thanks to come to see the photo.
http://farm3.static.flickr.com/2455/...4f1ecbfc_o.jpg
Many greetings
Cesar