people who walked by Burger Fi, Denver

From where I sat.

Aaah, aaah ... 

Choo!

The Nikor 60mm macro is too slow for this. (micro in Nikon lingo, they dare to be different. Or perhaps simply annoying) 

I finally realized the critical meaning of "fast"in photographers' argot. By needing speed and not having it.  The automatic focus in this lens is too indecisive, it tends to go back and forth as we do manually and that does not work when people are moving by, especially on bike. The much smaller, much faster 50mm must do. It is fine lens. It locks in a focus like bang. Plus it has wider framing. Plus it is lighter. Plus it has very nice bokeh. Plus it is less expensive.