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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Re: Canon 300mm f/4 with canon 1.4 or 2X extender (mk3 vs mk2) or 100-400mm
In reply to DGways, Jul 2, 2013

The Canon 400f/5.6L is probably the fastest focusing, & sharpest lens at 400mm of the ones you are considering. The 100-400 is next, 300 + 1.4tc 3rd in image quality. You will lose IQ with a 2xtc which may make the prospect unapealing. I started a thread a week or so ago on the subject of using a 1.4tc on the 300f/4 IS. I have a Sigma 120-400 OS, & am going to persist with it for the time being, & maybe look again at the 300+tc later. Sigma also do a stabilized version of the 50-500 that has had fairly good reviews, although it is a heavy beast, & not called the "Bigma" for nothing. But for BIF & wildlife, the 400f/5.6, although not having IS, is probably your best bet.

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