On Thu, 1 Feb 2001, Plumviewer wrote:
> Julian Loke wrote:
> >
> > >> http://bobatkins.photo.net/info/faq30/eos3af.html
> >
> > > "Plumviewer" <[EMAIL PROTECTED]> wrote: ...
> > > And, repeated acknowledgment that the 70-200 2.8 L is kind of
> > > an AF odd ball ...
> >
> > Hi Plums,
> >
> > This point escaped me. What do you mean about the 70-200/2.8?
> >
> OK, here's what I think is odd ball about AF and the 70-200 2.8L.
>
> The lens chart of every Canon Lens brochure since arrival of the 1N and
> the 70-200 2.8L carries a footnote - *** Only the central focusing point
> should be used when these zoom lenses are used with EF Extenders. (This
> is the latest footnote and now refers to the 100-400L zoom as well as
> the 70-200 2.8L).
I think that was also written in the manual of the 70-200, but it is not
written in the manual on 100-400. The manual is btw a "manual" compared to
the "sheets" that come with most lenses. It has long lists of how the IS
is affected in all the EOS cameras, and it even goes to give exposure
compensations for EOS-1N RS and EOS 5/A2/A2E for using the 100-400 with
either EF1.4x or EF2x. That is quite strange as these cameras are metering
through the lens... but no mention about using any other focusing point
than the middle one.
But of course when 100-400 is used with the 1.4x, the aperture drops so
small that only middle AF point is active (with EOS 3 and EOS 1V)... so it
should have a different footnote. One that doesn't say "should be" but
says "can be"... ;-) And with 2x even the middle point is lost.
So, back to 70-200 f/2.8L...
> In June of 1995 I bought and A2E, 70-200 2.8L and EF 2x extender. The
> 2.8L was very new then and I asked the Canon rep about the "footnote,"
> on the EOS 1n's brochure. He said "Forget about it. All focus points
> will work."
>
> Well, he was right. Little did I know that that the 2.8 L and EF2x
Yes, I've too used this combo previously. No problems with any focusing
points. All work. How is the precision... haven't noted any differences.
Maybe there is, but again in real life.... well too little things to worry
about.
Best regards,
Hugo.
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** Hugo Gävert **
** [EMAIL PROTECTED] http://www.hut.fi/~hugo **
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