NGC 7293
Helix Nebula
Date: 1 September 2011, 10 October 2012, 14 November 2012, 29 September 2013 and 30 October 2013
Optics: Orion AG14 Astrograph f/3,8
Camera: Canon EOS 5D Mark II, modified
Exposure: Total 420 min, 5 min single exposures at ISO 1600
Location: Hohe Asch Observatory
Image processing with Fitswork and Photoshop CS5
A.S.