Thread: calculating focal length
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Old 04-04-2007, 12:47 PM
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iceman (Mike)
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Join Date: Sep 2004
Location: Gosford, NSW, Australia
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From my recent Jupiter image (2nd April), I calculated my focal length to be 10,028m (or f/33).

349 pixels across, 5.6 microns, 40.2 arcseconds.

Thanks for the formula and example!
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