Yes, the AF is slower with the extenders, especially the 2x. With the 1.4x on the 70-200 II, it's on par with the 100-400; with the 2x it's slower. It's all relative, though - even 'slower' is pretty darn fast with the 70-200+2x.
Yes, the AF is slower with the extenders, especially the 2x. With the 1.4x on the 70-200 II, it's on par with the 100-400; with the 2x it's slower. It's all relative, though - even 'slower' is pretty darn fast with the 70-200+2x.
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