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Need someone to explain something to me.
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<blockquote data-quote="Marcel" data-source="post: 642976" data-attributes="member: 3903"><p>Variable aperture zooms usually have less light coming in at longer focal range. This does not mean the aperture blades are closing, it just means the actual change of lens elements arrangement is allowing less light to come in even with the aperture open all the way.</p><p></p><p>So in a real life low light situation, the slower lens (5.6 compared to 2.8) should take more time to achieve focus or might even mis-focus.</p></blockquote><p></p>
[QUOTE="Marcel, post: 642976, member: 3903"] Variable aperture zooms usually have less light coming in at longer focal range. This does not mean the aperture blades are closing, it just means the actual change of lens elements arrangement is allowing less light to come in even with the aperture open all the way. So in a real life low light situation, the slower lens (5.6 compared to 2.8) should take more time to achieve focus or might even mis-focus. [/QUOTE]
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