NGC 5792 in Libra, with some 22 quasars and AGN's, and their red shifts (z) from NASA's Million Quasar Catalogue marked.
Our shot
(Original image here) is quite deep - 18 hours of luminance plus 3 hours each of RGB taken with a 20" PlaneWave.
The catalogue is patchy and only covers the bottom half of the image. A red shift of 3.5 indicates that the light was emitted about 12 billion years ago.
Most of the quasars have an obvious blue colour to them. A quasar is the highly red-shifted light from an active galactic nucleus of an extremely distant and itself usually invisible galaxy, emitted as material spirals torrentially into the central black hole. The blue colour in our image would have been invisible hard ultraviolet when emitted, but it has been stretched by the expansion of the universe.
Excepting in the zenith, seeing was about the worst we've ever experienced while taking this image over the last week, so its main claim to fame is depth, lots of quasars and AGN's, and (hopefully) accuracy of colour.