So hier noch mal für alle:
Quelle: Rob Galbraith
Gruß,
TomTom
Hey Tom,
wenn man andere Bereiche in Deiner Quelle hervorhebt, kann man trotzdem sehen, dass es sehr wohl möglich ist, dass die High ISO Fähigkeit besser als bei der Ds sein wird.

Sensor With a size of 24 x 36mm, 21.03 million image pixels and a pixel pitch of 6.4µm square, the 5D Mark II's CMOS sensor offers the identical pixel count in a sensor that's identical in size to the full-frame EOS-1Ds Mark III. The 5D Mark II's sensor also features the same light-gathering area within each pixel (called the fill ratio) and same microlens coverage over each pixel as the company's current flagship.
To achieve what Canon is saying will be the highest image quality and lowest noise ever to emerge from a Canon EOS digital SLR, they introduced several refinements: the array of red, green and blue coloured filters over the sensor have been made more transmissive, which effectively bumps up the sensor's light sensitivity, plus they tweaked the way the sensor's signal (the light it has gathered during the exposure) is amplified and then read out.
Canon is showing some serious confidence in the 5D Mark II's image sensor, and in particular its noise characteristics: they've given the camera an extended ISO range of 50-25,600, which is a three stop jump from the ISO 3200 upper limit of the EOS-1Ds Mark III (and the 5D as well).
Es ging ja bei der ursprünglichen Sache nur darum, dass ein 1DsIII Nutzer (Dirk Wächter) meinte, die 5DII sei deutlich besser im High ISO Bereich als seine DsIII.
Aber genaueres werden wir wohl oder übel erst wissen, wenn wir RAWs haben.
Grüße,
Simon