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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Howard S Senior Member • Posts: 2,072
Re: Canon 300mm f/4 with canon 1.4 or 2X extender (mk3 vs mk2) or 100-400mm
1

FWIF I have both 300/4 IS andd 400/5.6 and based on my experience the 400/5.6 is much faster AF than the 300/4 IS with or without 1.4x

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