Lagoon Nebula Lagoon Nebula (M8) in Sagittarius Technical Details Telescope: C11 and f6.3 reducer Mount: MI-250 Camera: SBIG ST-10XME Filters: None Dates: August 23, 2005 Exposure: 32x15secs for 8 minutes total at -12C Notes: This nebula is about 7,200 light years away. It is about 50 light years wide, and is being lit by newborn stars within it.