« on: April 21, 2013, 07:07:03 AM »
It's classed one up because its a FF body ...
And therein lies the conundrum ... for if the size of the sensor is the criterion, then the 6D with its 20.2MP sensor trumps the 1DX with its 18.1MP sensor ... on paper.
There is no conundrum. Size as in physical dimensions, not MP count. The 6D, 5DIII, and 1D X all have the same size sensor, and it's the ability of that physically larger sensor to collect more total light than an APS-C sensor that leads to the better high ISO performance.