Quote Originally Posted by Sean Setters View Post
Basically, yes. Bryan fills the frame with the test chart. If a camera has a lower resolution output, its image will appear smaller by comparison.
I think if you didn't realize this, the crops could be misleading. Unlike lenses ISO comparisons which are the same length if shot with the same camera body your comparison would be fairly equal.

For instance the 1D IV crop vs the 1D X or any full frame camera, the 1D IV is 1.3 times further away. The dynamic really changes if you want to make the comparison to see if the 1D IV image quality is as good as the IQ of the 1D X picture cropped to match the 1D IV.

Knowing how the crops are done I am thinking the 1D IV may actually win in the crop competition, and clearly the 5D's are ahead.

I think a fair comparison to determine which body has the best IQ would be equally sized pictures, framed from the exact same distances with the exact same lenses.