NGC6397 is one of our closest globular clusters. Its a pretty interesting place in that its really dense with stars separated in light weeks rather than the light years between our Sun and its nearest neighbor. Every so often there are collisions and when they collide new blue stars are thought to form.
The Hubble Heritage has a good piece on it
here
This is 80mins appx of RGB captured during the last new moon using a GSO RC8 and STL6303e. Processing in PI
Larger image is here
http://astrob.in/106045/D/
Thanks for looking