Sigma DN 19mm f/2.8 on Olympus E-M5
The Sigma DN 19mm f/2.8 for Micro Four Thirds is equivalent to a ~38mm f/2.8 on a full frame— a slightly wide normal lens.
Just posted in Guide to Mirrorless are some examples with the Sigma DN 19mm f/2.8 on the Olympus E-M5 as well as a page showing the Sigma 19/2.8 chromatic aberration with and without correction.
I tend to like the way the lens renders in black and white, so I show several black and white conversions.