HELIX NEBULA
Optic: Canon 400 mm f:5.6 L. Camera: Modified Baader Canon 350D (Halpha pass filter - see here) at ISO800. Mount: Takashi EM200. Exposure: 110 minutes (55 x 2 minutes). Processing: Iris software. Observatory: Pic du Midi (altitude 2860 meters, french Pyrénées). Date: July 27, 2006.
Crop around the nebula
Negative view
Click here for display the image at the original scale
