Messier 16

Optic: Canon 400 mm f:5.6 L. Camera: Modified Baader Canon 350D (Halpha pass filter - see here) at ISO800.  
Mount: Takashi EM200. Processing: Iris software. Observatory: Pic du Midi (altitude 2860 meters, french Pyrénées).

Messier 16 nebula (full frame)
Stack of 28 x 120 seconds exposures - 400 mm lens used at full aperture (f:5.6). July 27, 2006

Detail of Messier 8
Crop at the original size - Soft unsharp masking applied