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Need someone to explain something to me.
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<blockquote data-quote="Texas" data-source="post: 643013" data-attributes="member: 42267"><p>Moving from zoom to a similar decrease in light, this time from focus distance:</p><p></p><p>Macro lenses are notorious for extending way out during close focus and the amount of light captured at the sensor/viewfinder goes down, a lot. But the f number (as advertised / spec'ed) stays the same due to wrinkle in the definition.</p></blockquote><p></p>
[QUOTE="Texas, post: 643013, member: 42267"] Moving from zoom to a similar decrease in light, this time from focus distance: Macro lenses are notorious for extending way out during close focus and the amount of light captured at the sensor/viewfinder goes down, a lot. But the f number (as advertised / spec'ed) stays the same due to wrinkle in the definition. [/QUOTE]
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