Any reason the D810 doesn't come with 2 SD card slots like the D750? Why one Compact Flash slot and the other an SD card slot?

[ShunCheung]

<p>UHS-2 has an additional, second row of electronic contacts (pins): http://www.sdxc2.com/UHS-II.htm<br>

Otherwise, the sizes of SD and Micro SD cards don't change from UHS-1 to UHS-2.</p>

<p>Essentially you can use an UHS-2 card inside an UHS-1-compatible device. It is still backward compatible, but you won't get any benefit from the UHS-2 speed.</p>

[Andrew Garrard]

<p>Dieter, glad to help (and what Shun said, they're not completely incompatible). More importantly, thanks for that link!</p>