From: "Eric" <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
Date: Wed, 19 Mar 2003 12:52:29 -0000
>Hi all,
>
>I currently have a 100-400L and a Canon 2x extender and was
wondering if it
>was only canon extenders that you lost auto focus on, or all
lenses slower
>than 2.8 regardless of the extender used.
>
>For what its worth, I use this combo on an EOS 3
Most EOS cameras can maintain autofocus to F5.6, The EOS 3 can
autofocus down to F8 (cant remember what the 1V will do, but I
assume it will also go to F8, anyone know what the 1D and 1DS will
do?).
In either case the 100-400 with Canon 2X is smaller than F8 at all
focal lenghts. The lens becomes a 200-400/F9-11. With a Canon
1.4X it becomes a 140-560/F6.3-8, so you could have autofocus with
the EOS 3 at all focal lenghts.
Darrell
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