Ophiucus is full of Barnard’s dark nebulae. This image shows a view of four of them:
B67a – top right
B75 – top center
B262 – center
B261 – bottom center
Three of these are part of the Astronomical League’s Dark Nebulae Program.
Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
240 minutes total exposure – 4 hours
LRGB - https://www.flickr.com/photos/dcrowson/22069396766/sizes/l
Imaged August 11th, 12th and 14th, 2015 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.
I also used a Canon T1i and 70mm lens to image the same field one of the nights. The 17.7 x 11.8 degree image shows 59 Barnard Dark Nebulae.
Canon Image - https://www.flickr.com/photos/dcrowson/22069045461/sizes/l
Canon Annotated Image - https://www.flickr.com/photos/dcrowson/21436252304/sizes/l