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Hi Dave
Yeah – I had already read that and noticed the comment about Canon sensors with a 300mm F5.6 MIRROR telephoto lens.
It is interesting to also note that Canon, for the EF 2x II Converter, state that:
“…the EF 2x II still allows autofocus with any EOS body when used with a lens f/2.8 or faster”.
That is why I decided not to buy one of these for the Canon, as it appears that there may be a design limitation in the Canon that prevents the auto focus being activated with slow F ratio optical systems?
Cheers
Dennis
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