Canon 300mm f/4 with canon 1.4 or 2X extender (mk3 vs mk2) or 100-400mm

Started Jul 2, 2013 | Questions thread
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DGways OP Junior Member • Posts: 32
Re: Canon 300mm f/4 with canon 1.4 or 2X extender (mk3 vs mk2) or 100-400mm

Thanks, can anyone vouch for the autofocus speed of the 300 f/4 with the 1.4x teleconverter (mk2 or mk3 specifically)?

also, does anybody know if autofocus will work with a 300 f/4 lens, a 550d body, and a mk.3 2x teleconverter?

thanks, I'd love to hear more about these combinations. The responses so far have been great.

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