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RF 400, or EF 400 with adapter?

Started Jul 11, 2021 | Discussions thread
Tambopata Regular Member • Posts: 164
Re: RF 400, or EF 400 with adapter?
1

tkbslc

It's the exact same lens with the same motors, how could it perform AF better?

It's all in the electronics. The RF mount has more connectors than the EF mount (12 vs 8 if I recall correctly), probably more power can be delivered to drive the AF-motors faster, more AF actuations per second to deliver faster and more precicse AF. Canon is quiet about it, but my guess is that all the wireing is changed to allow for complete access to the RF protocol.

The optical formula is still pretty new and there's likely not enough advancements made since the release of the EF-versions to make a completely new RF- version. That will come with the RF 300/500/800.

 Tambopata's gear list:Tambopata's gear list
Canon EOS R5 Canon EF 600mm f/4.0L IS II USM Canon RF 24-105mm F4L IS USM
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