6D AF at EV -3 : why not able to focus f/8 lenses???

Started Mar 22, 2014 | Discussions thread
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Optical Senior Member • Posts: 1,097
6D AF at EV -3 : why not able to focus f/8 lenses???

I really wonder why the 6D is not able to AF with lenses where the widest aperture is f/8, like a 400mm f/5.6 with 1.4x teleconverter.

I thought this could be done with such a sensitive cross-type AF centre point.

Can someone explain this?

Thanks, Chris

Canon EOS 6D
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