http://petapixel.com/2013/09/15/sandisks-new-cfast-2-0-card-clocks-fastest-memory-card-world/
&
http://www.sandisk.com/about-sandisk/press-room/press-releases/2013/sandisk-offers-world%E2%80%99s-first-high-capacity-256gb-compactflash-card-supporting-the-latest-video-performance-guarantee-specification/
http://www.magiclantern.fm/forum/index.php?topic=8254.0