> On Wed, 31 Jan 2001, Dicky wrote: ...
>
> Hi Richard,
>
> Are you aware that the EOS-3 will have less than optimal
> autofocus performance for the EF 28-135mm f/3.5-5.6 IS
> USM zoom lens? There was a recent thread in the archives
> about this issue.
>
> Cheers
> Julian Loke
Julian, This is a thread I'm unaware of. I use the EOS3 with the
28-135 IS lens and printed 13x19 inch prints and they're beautiful. I
only use AF. I have never had a problem using AF with this
combination. I cannot imagine what you mean by "less than optimal
autofocus performance". I use the 28-135 as much as my 28-70 f/2.8 L
lens and can tell no difference the the AF performance. Even under the
most harsh conditions (low light levels) there is little difference
between the two. I know lots of people with that combination and they
have never mentioned an AF problem to me. Do you remember specifically
what was less than optimal about the AF: speed, accuracy and hunting are
the only qualities I can think of that are affected by AF. Are their
other criteria? Ray Amos
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