Hi Steve,
The F-stops listed on a lens spec like that are the largest
apatures the lens can have when zoomed to its shortest focal length
(24mm @ f/3.5 for this lens) and its longest focal length (70mm @ f/5.6
for this lens). If you have an automatic camera it will make these changes
for you automatically.
At 05:49 PM 8/22/2002 +0100, you wrote:
>Hi all
>
>Sorry if this is a dumb question.
>When you get a spec. for a lens,
>for example: 24-70mm f3.5/5.6
>I know the f3.5 is the speed of the lens,
>but why is the 5.6 listed?
>
>Many thanks
>
>Steve.
Brian Blankenship
B & N Graphics
http://www.bngraphics.com
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