Looking for something to image early in the evenings last month while I waited for my preferred targets to rise, I shot a few images of Omega Centauri.
Here is the result - 4 hours Lum and just under 1 hour each of R, G and B in 5 minute subs.
Taken from my dark sky site near Coona at the iTelescope facility with a PW CDK12.5 and STX16803.
Processed (roughly) in PI.
Here is a link to a larger version.
http://www.pbase.com/equitius/image/156638834/original
Pete