Went to my local JB Hifi on the weekend and saw the Sigma70-300mm f4-5.6 dg macro for $150.... needless to say I couldn't resist. I mean, for that price who cares if it's terrible I can still have some fun with it. So I took some photos that night, seeing was horrible, there was local burnoffs and the air was quite smokey. But all the same, my results were pretty good for a super cheap lens piggybacked on a goto dob.
Canon 550D
Sigma 70-300mm f4-5.6 dg macro @ 300mm f9.0
249 Lights 4sec iso1600
40 Darks
101 Bias
Hi Res:
http://www.astrobin.com/full/245041/0/