Holy Mega-pixel Madness Batman!!
That's a lovely big field & so very full of galaxies, noice one mate.
Looks like three large clusters down the bottom of frame alright with loads more sprinkled around for good luck, all that from 5 hours worth...do we have an envious drool smiley?
You know Mike you should really go deep on Abell 1689 & do a supercluster some justice...hint, hint.
A couple of galaxies trying to hide behind a star in the top right corner caught my eye, seems one of them goes by the name of 6dFGS gJ123539.4-110402...just rolls off the tongue, very romantic.
Oh yeah & M104 looks pretty good too.
Here's hoping for some better seeing conditions for you.