The Big Dipper was shot with a Canon 1000D (Digital Rebel XS) and an 18-55mm zoom lens at 20mm of focal length with a 2-minute exposure at ISO 1600 at f/3.5 on this barn-door tracker, driven by hand. Clouds obscure stars in the upper right corner of the frame.
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发表于 2011-8-23 21:33:33
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