Check this image of NGC 5139 taken with the EQ6/SS2K
with a Synta 150mm refractor.
http://members.iinet.net.au/~westsky/NGC5139.jpg
Whilst the image could be a lot better(note the slight field rotation ),this
was my fault not the mount's.My polar alignment was out by 7 degrees and as
this was a 20min unguided image I think the results are quite good

7 degrees misalignment and 20 min UNGUIDED exposure. Are you joking??

Roland Christen