I think I got lucky here. I used a Sigma 300-800mm telephoto zoom with a sigma 2xtc mounted on a regular tripod with my new 20da. Pointed at the first "star" I could get in the sights, turned on the live preview mode, and started to focus. hehe... at first I was thinking geez this lens had some nasty aberrations with those "rings" and all. Then I was floored as I realized what I was really looking at ... it was Saturn!!!! The pic isnt great, but Im sure impressed.
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