I finally took my UMN out for a field day, as I have never really seriously tried to see how it renders. I am pleasantly surprised by not only the obvious sharpness and contrast, but by what turns out to be a very nice bokeh as well. It is true that I have done a bit of sharpening at both a fine and medium radius (not too much, actually) and added a bit of microcontrast, but basically this is what I got. There is a certain cleanliness and precision to the rendering that I just have not seen with any other lens, even very good modern ones.