« on: July 07, 2014, 10:18:04 AM »
That is laughable for several obvious reasons, first, they are saying the Ziess lens is perfect and causes zero resolution loss, that is impossible, it is either breaking the laws of physics, or their measurements are suspect yet again. And, just read any Nikon forum where people own both, and there are a surprising amount, they will tell you that is simply not true, yes the E does resolve slightly more, but 30% more, no.
Not exactly perfect. just able to use the full resolution of the sensor.
If they sensor was 8 MP and a lens resolved 8, would you call that perfect? Just pushes the limit of the sensor.
No that isn't how it works, there is a complex relationship between each individual elements efficiency and a systems efficiency. Pretty much all lenses can actually resolve way more than any sensor, just look at the difference between a lens optical bench tested lens and one that relies on a camera sensor, huge difference.
So if the sensor was a 20MP sensor and the lens and sensor were both perfect then you'd expect to get 20MP of resolution, this is what DXO are claiming for the D800E and Zeiss 135 combo. However if we ignore all other factors and the lens is only 99% perfect it can only possibly resolve 99% of a perfect sensors resolution, and no sensor/camera is perfect. So the perfect sensor and 99% perfect lens could equate to 19.8MP in a simplified form.
For the full equations look here under "System Resolution": http://en.wikipedia.org/wiki/Optical_resolution