Canon 5D Mark III Review & Wedding Setup

Started Dec 26, 2012 | Discussions thread
OP Halkett Photography Junior Member • Posts: 46
Re: What is the actual speed of 5D3 memory slots?

I don't shoot any images in JPEG, so my comments were referring to taking all images in RAW format.  What I meant by second writing or backing up your images to the SD slot is, If you select this option; the images on the CF card slot will only read at limited speed.  That is, it will be writing the same sized filed to the SD slot at 133x speed (20MB/s), so no matter how fast the CF card can read (150MB/s), it will be limited by the SD card slot read speeds.  Hope that helps

Regards,

Derek

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moe
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