When comparing a lens mounted on the A7R and A7RII, why is it the lenses are way sharper on the A7RII? The camera only offers a 6MP increase in resolution, yet the lenses show a much greater increase in sharpness? Why is this? For example, the Sony FE 16-35mm F4 ZA OSS scores 16MP on the A7R and 26MP on the A7RII.
Can someone from DxO explain this? Thank you.