There should be plenty of threads on this but I have some samples on my flickr in a dedicated Sigma 50/1.4 thread. Bokeh is smoother with the Sigma but it also exhibits onion bokeh.
Dec 24, 2011 at 09:55 PM
Previous versions of M Vers's message #10192205 « bokeh with Canon 50mm 1.4 vs Sigma 50mm 1.4?? »
