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Tony, I think you mean 1.4x tc. and no it does not, though with both at 5.6, its pretty close. however, the AF is not as fast as the bare 70-300. I find 70-300 a great lens for hummers. better keeper rate than 100-400 due to its better AF and of course sharper at 300 than 100-400 at 400, as long as you can get close enough to the birds.
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