The Sony a6400 is an impressive value like the Sony a7III, but there seems to be some controversy about it’s new AF system. To be clear it is not Sony a9 level, but it is the best AF performance out of similarly priced APS-C cameras. That’s not very hard to believe, but some Youtuber’s are going through great lengths to demonstrate the performance while others are just taking Sony’s word for it, which is based on internal testing.
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Sony a9 Action Shooting Kit: B&H Photo / Amazon / Adorama
Sony a9: B&H Photo / Amazon / Adorama
Sony a6400 Preorder: B&H Photo / Amazon / Adorama