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Is RF 28-70 F2.0 suitable for fast moving objects? (AF speed)

Started Aug 3, 2021 | Discussions thread
Mister Green New Member • Posts: 17
Re: Is RF 28-70 F2.0 suitable for fast moving objects? (AF speed)

Tommy S wrote:

I am tempted to buy this humongous glass, but I read in a thread @Canon EOS R an opinion expressed by an advanced amateur, that 28-70 tends to have some AF speed issues with fast moving objects. As I am not able to test it before purchase I would like to hear from the the real users of RF 28-70 if you have any observations in this regard.

I can guess that moving such a big piece of glass might require some sort of brutal force and the whole system might be slower than RF/EF 24-70.

Jared Polin, a youtuber, posted a video last year of the R5 with an F1.2 lens to test AF accuracy.   He had his son running up close and zig-zagging around, and got near 100% accuracy.  I remember at the time thinking that was the last lens I would use for fast moving subjects, and if it can keep a subject in focus, almost any lens can.

I am not sure about the 24-70 lenses, but I would guess they do better than the F1.2 prime.

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jnd
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