7D+100-400+ 1.4XII=no focus

Started Mar 10, 2012 | Discussions thread
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OhioBob
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7D+100-400+ 1.4XII=no focus
Mar 10, 2012

Just got a used 1.4XII and tried with my 70-200 II 2.8 and works great tried it on the 100-400 at any focal length and it will not even try to focus. Tried to same combo on my old XT and the same outcome.
Both these cameras should try to focus at 100mm it shows f6.3.
Any one else using this combo and have it working?

 OhioBob's gear list:OhioBob's gear list
Canon EOS 7D Canon EF 50mm f/1.8 II Canon EF 85mm f/1.8 USM Canon EF-S 17-55mm f/2.8 IS USM Canon EF 100-400mm f/4.5-5.6L IS USM +6 more
Canon EOS 7D
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