In reference to the original post... Buy any lens made since the 1970's or so from the big four (Nikon, Fuji, Rodenstock or Schneider). You won't be able to tell the difference unless you are a goofy pixel peeper like I used to be and revert to being sometimes. Sample variation will matter much more than make/model comparisons in many cases. What will matter even more in getting sharp and contrasty pictures is your own technique, your tripod, the wind conditions, etc.