Variable crop mode

[guentergunter]

Is it possible to access other crop modes than 5x and 10x on 5D2?

Then, we could choose a crop factor that exactly fits (or comes very close) to 1080p or 2K, or whatever.
Thus, no (or little) sensor space would be wasted.

[eatstoomuchjam]

Crop mode recording is always 1:1 on the sensor regardless of the zoom unless I'm mistaken.  You'd only be changing the preview size.

[guentergunter]

But the recordable resolution increases (great) when you zoom in
However, zooming in also crops the recorded image -> bad (due to the loss of wide angle)

So, I thought about a cropping mode that crops just enough (maybe 2,4x) to gain a specific resolution (e.g. 2K).