Canon has released the manual for the upcoming Canon EOS R3, which is scheduled to begin shipping on November 26, 2021. This is a 1037 page masterpiece of a manual.
The PDF below is compressed and the images may not be the usual quality. Downloading directly from Canon will give you the full resolution.
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The first year I remember with only a single new camera.
Why on the R3 is the buffer depth the same regardless if one writes to the SD Card or CF Express cards at 30 fps with the electronic shutter? For the R5 at 12 fps mechanical shutter there was a significant difference between the two.
Also, the official list of compatible Flash Units is shorter than I expected.
Edit: But the R3 Manual itself does say EL/EX series Speedlites can be used.
Thanks for your sarcastic answer. You must feel very clever.
At some point you have to stop reading and take a few pictures.
The camera buffer is fixed and is separate from the storage medium being written. Its depth does not change but the ability to clear it does depending on how fast the offloading is to the storage medium. The buffer will fill up faster with slow storage medium (SD) and clear faster with faster storage medium (CFX), and thus will appear to have a bigger "depth" with fast storage mediums.
It's probably a typo.
You're right but it also says that high data rate video cannot be used with SD cards. The C70 not only supports V90 cards, it requires them at high data rates. The R3 may support V90 cards but their speed advantage is apparently lost. That's what upsets me.