This is my first post in this section and hopefully not my last.
Thought I'd have a go at Jupiter since it's easy for me to find.
Took this using my Sigma 300-800 with 2x extender.
I found that the focus was a nightmare as my 20d does not have liveview.
This was the best I got from that night. Taken on the 30th of August 2009
Am looking forward to trying again.