From: "Allen, Bob" <[EMAIL PROTECTED]>
> I am pretty certain that the text you quote from B&H is outdated but was
> correct prior to release of the EOS-1v. They probably copied the text from
> Canon USA's website which is pitifully out of date and poorly done (and
that
> is a gross understatement).
Well, that can't be true because others here are saying that the TCs won't
permit autofocus with a 100-400 on an A2, and those 3 pieces of equipment
have nothing to do with the new 1v, or even the 3. We may just be having a
breakdown of communication here, so to try to clarify let me try to restate
my question: The info posted on the B&H website, which most likely came
directly from Canon, states that the teleconverters are compatible with
lenses A, B, C, D, E, F and G. It then goes on to state that you must focus
manually with lenses A, B and C. Why would they say that, if in fact you
must also focus manually with lens D, unless used on an EOS 3 or 1v, which
may not have even been in existence at the time? Oy, that doesn't sound very
clear either...I hope someone understands what I'm trying to say...
> Manual focus is required when using 100-400IS and 1.4x tele with my EOS
A2> but autofocus works fine with my EOS-1v. Why?
<snip>
I understand all that...I just don't understand why it isn't made clear that
the 100-400 won't autofocus with a TC unless you use it on an EOS 3 or 1v.
> To prove to myself that I got it right, I just performed a highly
scientific
> test with my EOS-1v, 100-400IS lens, and 1.4x tele. Both with and without
> the 1.4x, it autofocused and IS'd just fine while focusing on a bag of
> dogfood (brand and size available upon request). Autofocus was noticeably
> slower when 1.4x tele was used but this may have been due to low light
level> in my kitchen (it's nighttime here) and my dog biting my bare toes
during
> the experiment.
Uh, what kind of dog, and what size bag of food? If you'd performed that
test here, with my 220 lb. mastiff's massive bag of food, I think you could
stop down to 22 with 2 TCs and still autofocus from a block away :)
Kim
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
