Thread: F-ratio myth
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Old 22-02-2018, 02:00 PM
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Peter Ward
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Quote:
Originally Posted by Shiraz View Post
also applies to stars Peter. Faster optics produce smaller more intense focal plane spots from unresolved objects like stars - works just the same as with extended sources.
Well I've give you the Airy disc size.... is solely determined by F-ratio....but suspect the seeing will swamp any differences in practice.
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