On Mon, 30 Jul 2001 10:51:54 -0700 (PDT), you wrote:
>Now this does raise an interesting question. Dos the
>aperture actually change size as you zoom, or only
>when the lens is stopped down for picture taking? I
>think it must vary in real time, because I don't
>notice changes in brightness as I zoom my 70-200.
Wouldn't you have to hold down the DOF preview button to tell?
Ken
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