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Telephoto
Noob question - focal length vs aperture
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<blockquote data-quote="Dave_W" data-source="post: 126472" data-attributes="member: 9521"><p>I would phrase it this way, at 200mm you're sampling less of the world and than at 70mm. As a result the sheer quantity of photons entering your lens is less at 200mm than at 70mm due to a smaller sample area, hence less light.</p></blockquote><p></p>
[QUOTE="Dave_W, post: 126472, member: 9521"] I would phrase it this way, at 200mm you're sampling less of the world and than at 70mm. As a result the sheer quantity of photons entering your lens is less at 200mm than at 70mm due to a smaller sample area, hence less light. [/QUOTE]
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Noob question - focal length vs aperture
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