Can someone explain 2560 x 1072 on a 5DM3? Bigger then 2K?

[mannfilm]

Alot of us pro's with 5DM3's are stunned by the idea of 2560 x 1072 (+2K.) Its really huge news. Could someone explain what the current status is? If real, this should be its own permanent thread.

[weoul]

with what  FPS?

[CFP]

You can get this resolutions only in crop mode. So it will increase your crop factor from 1 to 2.25

And of course it's only possible with a very fast card and an highly optimized build so that you can achieve the required 110 Megabyte/s write speed. (At 24 frames per second. Lower f/s will redurce the required write speed.)

[friano75]

2.5k crop mode works but only 15 seconds long for me. amazing