Sharp right into the corners without ifs and buts

Apparently I have drawn a bull's-eye in the production lottery.
On my Nikon D810, the lens is already at full aperture sharp right into the corners, however, the resolution is even lower.
The lens has a breathtaking sharpness does not differ at aperture 8 on the D810 the Aufloesungsmaximum at the corners of the center.
The built-in chip also works the diaphragm and aperture priority mode.
The focus is manually but that's not really a handicap.
At aperture 8 and everything is 0.8m to infinity by 40cm.
Even in backlit no reflexes and especially little chromatic aberrations!
The distortion of the lens can be easily corrected in Lightroom or PS.
Given the price really a buy recommendation.