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

Started Mar 21, 2013 | Discussions thread
pavinder
Regular MemberPosts: 213
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Re: Aperture/focusing distance changes at different FL for zoom lenses?
In reply to Ulric, Mar 21, 2013
It's not that the aperture closes down, but that the focal length increases.

Of course the aperture closes down!  As the focal length increases, the aperture closes.

That's what it means when the number goes from 3.5 to 4 to 5.6 etc!

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