I shot this at 5:52 AM CDT this morning. Nikon D70 at prime focus of a 10" f/5.6 Dob, pushing it by hand to follow the ISS. I used a P-Clix timer to fire the shutter at 1 sec intervals, so all I had to do was keep the ISS in the field. 1/4000 sec @ ISO 800.
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