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RF 400, or EF 400 with adapter?

Started Jul 11, 2021 | Discussions thread
BirdShooter7 Veteran Member • Posts: 9,127
Re: RF 400, or EF 400 with adapter?

PicPocket wrote:

Tambopata wrote:

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.

Probably. Guess.

If we are guessing, my guess is that it is the exact same lens as EF version with the adapter bolted on. The adapter has 12 pins too. My guess is this is no different

My guess is that Canon didn't see much improvement they could do to the EF lens in the time frame they wanted to release this in. The corresponding EF lenses are fairly new designs. This is also probably why the price didn't jump up like every other RF redesign

We can revisit the guesses when someone is able to do an objective side by side

Which brings us right back to here:

https://www.dpreview.com/forums/post/65308542

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