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F-ratio myth
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22-02-2018, 02:09 PM
Shiraz
(Ray)
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Join Date: Apr 2010
Location: ardrossan south australia
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same with seeing-limited imaging - angular star size is fixed by the sky, linear size in the focal plane depends on focal length, so shorter scopes produce smaller spots
Last edited by Shiraz; 22-02-2018 at
02:40 PM
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