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FE 100-400GM will not AF at 400mm

Rgwaller1
in General Discussions about Sony Alpha

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When I use my A7rIII with the FE 100-400GM when I go to 400mm it will not AF. If I use 398mm or less it AF without a miss. Is anyone having this problem? It does not matter in which Focusing mode I have it in.

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https://www.sonyalphaforum.com/topic/9253-fe-100-400gm-will-not-af-at-400mm/
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