Messier 16 (Eagle Nebula, top) and Messier 17 (Swan or Omega Nebula, bottom), shot from home in southern Alberta with the objects low on the horizon, July 30, 2011. This is a stack of 5 x 5 minute exposures at ISO 1600 with the filter-modified Canon 5D MkII and the Borg 77mm f/4.3 astrograph lens (300mm focal length), and using the IDAS V nebula filter.
The Amazing Sky 