There is some thing about 5D original

aftab wrote:

This is what I found.

5DI sensor (resolution) resists degradation by lesser lenses more than other cameras. There is something about 5D1 sensor.

Let's take Canon 16-35 II for example. This lens didn't do very well in DXO test. With this lens

5DI scores 10P-mpix, minimal loss of resolution

5DII scores 12P-mpix, huge loss of resolution.

Similar results with popular (but mediocre in DXO score) Canon 24-105.

What about a better lens? Let's take Canon 100/2.8

5DI scores 12P-mpix, no resolution loss

5DII, 15P-mpix, substantial resolution loss.

Things get interesting when you take the sharpest Canon lens, 300/2.8II

5DI scoes 13 P-mpix, as if its perceived resolution has increased, only camera to do this as far as I have seen.

5DII, 21P-mpix, no resolution loss.