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This is the second image of Messier 8, the Lagoon Nebula in this site. The first one can be found here. This one, also taken with a 20″ telescope, responds to a different processing concept. This image has been taken with narrowband filters (Halpha, OIII and SII), but processed the same way as NGC 3372. This means that the color-filter pairing tries to mimic the spectrum of the nebula. The stars, as usual, have been blended from an RGB image.
An HCP version of this nebula can be found here.
Name(s): M 8; NGC 6523; Lagoon nebula
Type: Emission Nebula
RA: 18h 03m 47s
Dec: -24º 22’ 54”
Distance: 4,300 ly
Date: Several between 2015-06-07 and 2016-04-13
Location: iTelescope.net, SSO near Coonabarabran, NSW Australia
Size (arcmin): 33×31
Telescope: Planewave CDK 20” f/6.8
Camera: SBIG STX16803 (4096x4096pix)
Guiding: Astrodon MonsterMOAG off-axis guider
Total exposure: 17 hours (Ha: 5.5h; OIII: 4.5h; SII: 5.5h; RGB 1.5h)
Processing: CCDStack, Photoshop CC 2016 and PixInsight