there's something fishy about that rumor though. today's full frame shoots at a 100,000 iso, it goes that fast so you can get a faster shutter speed, it has nothing to do with color. and in some full frames, they sacrifice pixels just to get a faster iso. in this case they took it away (or maybe it goes to a 100k or 200k or whatever, and thats an expansion).
a cropped mode makes little sense unless the cmos gets closer to the lens, otherwise i might as well change the size. the cripple is that i can only use full frame on a full frame camera, the lens sticks too far in otherwise. and they didn't seem to change the shape of the camera at all. a mk2 and a mk3 look different.
from my understanding, they changed how the cmos works, so the pixel size may not totally come into play here, still i'd like to see some samples. and to get 50mp they had to sacrifice the iso, that's not good either. right now a file size is like 40megs - for 22mp. so 50 -- 100megs plus?
i'm not sure if it will be worth it or not.
---Mike Savad
MikeSavad.com