Using An SD Card In The Canon 5DMkIII Brings The Camera’s Speed To Its Knees

[amband]

Oh dear. Problems for the 5D III?
[indent=1]
Well…after some testing I have determined that, if you care at all about high speed shooting or clearing you buffer quickly, YOU DO NOT want to put a card in the SD slot.
Why? Because, for some reason unbeknownst to me, Canon decided to build the 5D Mark III with one very fast CF slot which supports the newer UDMA7 protocol and an SD slot which does NOT support the high speed standard.[/indent]




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[nahua]

This is correct - for stills. Although you can leave the SD card in there, you just don't want to shoot directly to it. However, it has no effect on video (yet, waiting for magic lantern). I have tested with All-I and IPB for video, no write problems.