Aperture/focusing distance changes at different FL for zoom lenses?

Started Mar 21, 2013 | Discussions thread
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Ulric Senior Member • Posts: 3,554
Re: Aperture/focusing distance changes at different FL for zoom lenses?
Many seemed to rapidly close down the aperture, and some had very long minimum focusing distances.

It's not that the aperture closes down, but that the focal length increases.

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