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Will R7 and EF 100-400L II track with 2 extenders fitted?

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Le Kilt Senior Member • Posts: 2,527
Will R7 and EF 100-400L II track with 2 extenders fitted?

Trick question really, but oh yes it will
Testing the R7 today with the EF 100-400mm F4.5-5.6L IS II, and added the extender 1.4x III and extender 2x II. Effectively 400 x 1.6 crop x 1.4 x 2 = 1792mm equivalent.

First tests horrendous with birds in flight, but birds/swans floating around and dogs on land at 400mm end, it latches on and tracks no problem. Ok, these were not moving fast, but it finds them in an instant and doesn't let go

With two extenders softening things, the end result is nothing to write home about, it's the AF tracking that blew my mind.
P.S. BIF tracking with just the 1.4x extender was very good.

First shot from phone, nothing special but gives a bit of 'perspective'.

1/1000' ISO 2500 - Ok, a bit of tidying up in PP and slight crop.

 Le Kilt's gear list:Le Kilt's gear list
Canon EF 16-35mm F2.8L II USM
Canon EOS R7
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