Re: EOS 100-300mm f5.6L with Tamron 1.4x SF AF

[Ken Durling]

On Tue, 16 Jan 2001 22:21:21 -0600, you wrote:

>You've got the right idea, but a 5.6 wide open is well...a 5.6. It doesn't
>get any faster than its' maximum aperture, and THATS the aperture that the
>camera has to use to AF. Throw on a TC, and the maximum aperture is one or
>two stops slower, i.e. f/8 or f/11.


But what about a 2.8 lens not AF-ing well when stopped down to f/8 or
slower?  That's what I don't get.  Isn't that what people have been
saying?  Maybe I misunderstood.  If so, your above explanation makes
sense to me.




Ken
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