Thread: Question about focal length
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Old 08-08-2009, 08:02 AM
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Kirkus (Kirk)
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Join Date: Dec 2007
Location: California, USA
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Question about focal length
If I'm imaging a planet at prime focus with, let's say a scope with a FL of 750mm, would the image be twice as large using a scope with a focal length of twice that -- 1500mm?
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