Barnard 92 (LDN 323 and others) is the dark nebula at the center of this image.
Barnard 93 (LDN 327, LDN 328 and others) is the smaller, finger-shaped dark nebula further to the left (east).
Both of these are located in M24 - the Sagittarius Star Cloud – that dominates the whole field of view.
Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
240 minutes total exposure – 4 hours
Imaged April 13th and 14th, 2018 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.
LRGB - https://www.flickr.com/photos/dcrowson/40876763054/sizes/l