What you see is the 100% crop of a photo taken with Leica M9 at 400 ISO and Leica 50mm Summicron-M 1:2.
The crop is taken in the far left edge of the photograph, taken of course wide open.
As you can see, the area in focus is focus.
But now comes the fun ... the goal, put under stress by a 18-megapixel sensor was assembled in 1960 (!!!), the optical design dates back to 1956.
So after 54 years of planning this goal is still able to give exceptional performance in extreme conditions.
The 50mm Nikon or Canon designed the new millennium, much less about pixel density sensors are unable to come up with the same results.
Leica is often ruled out a priori for the higher costs that requires ... but how many goals we can use Canon or Nikon 1960 with satisfaction today without fear of "dark" of megapixels? Zero.
Leica is possible.