Combination of 5, 3 minute images unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
NGC 6520 is a scattered group of both bright and faint stars in Sagittarius. The brighter stars in circular pattern with a bright orange star in the centre. The surrounding Milky Way is extremely rich.