So they're not the cheapest thing sin the world, but SanDisk have just announced their latest CF cards - and they are the UDMA Mode 6 cards we've been hearing referenced in the EOS 5D Mark II, EOS 50D and EOS 7D product specs.

With sizes from 16GB to 64GB and a write speed of up to 90MB/sec (double the current fastest cards, the Extreme IV), the SanDisk Extreme Pro cards will be the ones to be using if you want to make the most of your camera's burst shooting functions. 

The EOS 5D Mark II, EOS 50D and EOS 7D can all make use of these UDMA Mode 6 cards, so expect to see increased buffer performance as the camera writes data from the buffer to the memory card quicker, thereby freeing up the buffer for more images. 

For more information, get over to the SanDisk website.

To achieve such high speeds, they're using a dual core processor to handle the data. Prices from £197 to £657 depending on capacity. (16GB, 32GB, 64GB)

Did you know that Canon and SanDisk were two of the original partners in the CompactFlash card alliance? Because they both subscribe to the specifications of the group, SanDisk memory cards and Can cameras always work well together. In fact, I don't think I've ever heard of an issue with a SanDisk card and EOS camera.