Helix Nebula in Ha

Reprocessed and stretched a bit further to show the outer halos of the Helix Nebula in Ha. Imaged from the burbs of Melbourne, Australia on 21 August 2014. Instrument used was a 10" RCOS, AP-900 mount, STL-11000 Mono CCD running at -15 C, Baader Ha filters. 10 X 1500 subs. Processed with CCDStack 2 and Photoshop CS 6.

Done