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Re: [APML] Optics Question

Hi Wade,

In general, the photographic speed of a lens only depends on its focal ratio 
and has nothing to do with aperture.  So 300/F4 is 2/3 stops faster than 
FSQ106.

Cheers,

Wei-Hao

-- 
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Wei-Hao Wang  :)

Institute for Astronomy at University of Hawaii

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