Hey Julian,
I suspect this thread may be in the incorrect forum. It might be better suited in one of the astrophotography forums.
But to answer your question, in short, YES.
Have a look at what one fellow is capable of doing with DSO's through his 25" dob:
http://www.dansdobimaging.com/
There is also an article in the Projects & Articles in the left heading dealing with this too by Mike, the Iceman, Salway:
Astrophotography with a dob
The various stacking software available, much of it free too, is capable of dealing with image rotation that would be encountered with an alt/az mount, whether it tracks or not.
I'm sure there are much more qualified folks out there who can shed more light on this than I can.
Mental.
