Is there a nikon lens of equivalent sharpness and focal length for the dx format?

You may have had the ISO set as indicated, but you had enough light to create a very strong shadow. This may have contributed to the high quality of the photo's detail. Or, perhaps I am in error on this. What say others?

I understand that this comment is somewhat oblique to the main point of this inquiry, but my eyes seem to be telling me there is more pincushion distortion, especially in the vertical lines in the Tamron shot. This would not be so visible, however, in a shot that did not have straight lines.

DnGallagher:

Could you please identify the software you used to obtain this very complete EXIF report?

Bill Gordon