« on: January 30, 2012, 08:41:55 AM »
The 7D outperforms the 5Dmk2 at high ISO image quality per area sensor.
A 7D sensor scaled to FF at 46MP would have better image performance than 5Dmk2 in every aspect.
You keep saying that, where's your proof? I think it's clear that the 7D gave up ISO performance to hit the DR numbers it did. DxO labs is probably the most respected independent lab out there, and their tests show that the 7D is not even close to the 5DII in ISO quality.
Again, the 5DII hits 1815 ISO before falling below acceptable quality.
The 7D is only able to hit 854 ISO before falling below acceptable quality.
The 7D does a decent job, but it in no way "outperforms" the 5DII in ISO quality.
So show me the proof, or I write you off as a troll.
And, no, at best a 46mp FF sensor based on the 7D would perform at the level of the 7D, possibly more noise issues cropping up from the larger size. It would still be subpar to the image quality of the 5DII in every category. The trade off might be ok for you, but some of us actually want better quality at high ISO, and a 7D equivalent FF sensor doesn't cut it.
Sensor Scores 5DII 7D Bold type denotes winner in each category
Over all Score 79 66
Color Depth (bits) 23.7 22
Dynamic Range 11.9 11.7
Low Light ISO 1815 854
Edit - to include other DxOMark scores for the 5DII and 7D