Upload & Sell: Off
Frank and others have discovered that the a7r enhances lesser lenses, something Zeiss wrote about in a white paper: 'How to read MTF Curves Pt II'...
I mention it on occasion because it is a shining beacon of accuracy in the midst of a swamp of nonsense that you 'need the best lenses on high resolution sensors'. No, you don't. Optical truth is stranger than received wisdom. Which is fabulous news for fans of old lenses - ALL of them will have never looked better, and that is a scientific fact.
The a7r doesn't enhance a lens,per se, but it does permit a lens' innate characteristics to show through. And of course, at 36MP it does out-resolve a lot of lenses, especially in the corners.
What I think is funny is that most people don't understand that exactly what you are saying is correct; they look at the pixel level of a lens test and see that a camera may exceed the performance of that particular lens, when in fact, that is really unimportant in most cases.
Only if you are intent on matching the resolving capabilities of the camera do new lenses become required with these high resolving sensors. For the rest of us, using the lenses we love for their particular rendering capabilities will meet our requirements, and do so with more pixels to employ for reproduction purposes.
It's a win in all respects...