The Lagoon Nebula ( Messier 8, NGC 6523 ) in the constellation Sagittarius - by Mike O'Day ( https://500px.com/mikeoday )
The Laboon Nebula ( M8 ) is visible to the naked eye under dark skies from most latitudes except the far north. Seemingly covering an area about three times that of the full Moon, M8 actually covers an area somewhat greater than 110 light years and is around 4300 light years from Earth in the Sagittarius-Carina spiral arm of the Milkyway galaxy.
Messier 8, NGC 6523 - Lagoon Nebula.
Skywatcher Quattro 10" f4 Newtonian telescope.
Skywatcher AZ Eq6 GT Mount.
Orion auto guider - PHD2.
Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter.
Nikon D300 (unmodified) (14bit NEF).
Field of view (deg) ~ 1.35 x 0.90.
20 x 120 sec ISO400.
26 x 30 sec ISO 1600.
23 x 240 sec ISO 200.
PixInsight and Photoshop.
2 August 14 .
re-processed 24 April 2016 to include the additional subs ( the first version only made use of the 23 x 240 sec ISO 200 subs ) and putting use the processing lessons I have learnt over the past year.