Whilst rock climbing in the heart of the Southern Grampians last weekend sneaked in a 30 second widefield with my 400D and just arrived 17-70 Sigma DC lens.
30 seconds at ISO1600, lens set at 17mm, f/2.8 (equiv 27mm), adjusted in curves and slight colour adjustment to bring out the reds and blues and noise reduced.
Defenitely encouraging for next weekend's new moon astrophotography trip!