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Canon 100-400 L i vs ii

Started May 4, 2016 | Discussions thread
RS_RS Senior Member • Posts: 1,788
Re: Canon 100-400 L i vs ii
1

Jon Tarbuck wrote:

A few people have said that the first version doesn't work well with the 1.4x canon teleconverter - will it autofocus? I have a 5d3 so af works down to f8...

I used the original 100~400 with the Extender 1.4× II on the EOS-3 and EOS-1V film bodies and later the 5DIII with upgraded firmware, all providing f/8 PDAF, and with several other Live View capable digital EOS bodies. My copy of the 100~400 certainly did not work well with a known--good copy of that Extender. Whereas the 100~400 II works very well with the Extender 1.4× III.

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