Optic: Canon 400 mm f:5.6 L.
Camera: Modified Baader Canon 350D (Ha pass filter - see
here) at ISO800. Processing: Iris
software. Exposure: 70 minutes (14 x
5 minutes). Location: Pic du Midi (altitude 2860 meters, french Pyrénées).
Date: August 30.87, 2006.
Crop of the observed field
full frame (click on the image for enlarge)
A negative view version (the
red layer only)
Click here for display a large version (3460 x 2300 pixels).