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

Started Aug 3, 2021 | Discussions thread
RLight Senior Member • Posts: 4,426
Re: Is RF 28-70 F2.0 suitable for fast moving objects? (AF speed)

bernie r wrote:

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.

Yes, it's suitable... But the RF 70-200 2.8 is faster.

+1 here. You nailed both, and this is where I might grab a 70-200 over the 28-70; speed usually equates to reach. But the 28-70 is capable; no issues here with it not keeping up on my lowly R, except maybe the swing test. Most cameras and lenses fail that test though with the only passer being the M6 II + 70-300 IS USM. That’s a HARD benchmark to pass. The 28-70 faired well still though.

If I had the R5 the 28-70 probably would pass that test though. The scan rate of the original R is a bit slow for demanding AF needs.

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Camera:
Canon EOS R5
Canon RF 15-35 2.8
Canon RF 28-70 2
Canon EF 70-200 2.8
Canon RF 85 1.2
Canon EF 500 f/4 L IS II USM + 1.4X III
Other:
Gitzo Fluid Gimbal Head
Gitzo GT4543LS Systematic Series 4 Carbon eXact Long Tripod
Benro Mach3 TMA38CL Carbon Fibre Tripod
Benro G3 Ball Head
Canon Speedlite EL-1 Flash
Canon Speedlite 470EX-AI Flashgun
Gitzo Adventury 45L

 RLight's gear list:RLight's gear list
Canon EOS M6 II Canon EOS R3 Canon EOS R50 Canon EF-M 55-200mm f/4.5-6.3 IS STM Canon EF-M 15-45mm F3.5-6.3 IS STM +3 more
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