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BIF with R5 and RF 100-500mm compared to A9II and FE 200-600 G

Started Jul 4, 2021 | Discussions thread
BigBen08 Veteran Member • Posts: 7,472
Re: BIF with R5 and RF 100-500mm compared to A9II and FE 200-600 G

Georgeee wrote:

Sony 200-600 is a great lens on my A7rIII . I love its internal zooming is so smooth. IQ is great. I wish Canon had a lens like that. The lens is a main reason that I keep a Sonly body.

I also have R5 with adapted 100-400II + 1.4xIII, AF is faster than my a7rIII for sure

Your last sentence concerns me, as I'm considering the 100-500 and 200-600 for fast moving subjects (aircraft).

Do you have an opinion as why the Sony combo autofocuses slower than the Canon? Is it the a7rIII  or the lens itself. Would another camera body make a difference? Maybe I'm asking questions you can't answer. 

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