jaymrobinson wrote in post #5862180
The article is in Japanese, but notes that this lens is much bigger than the Canon 50mm 1.4 with much better flare control and bokeh.
He basically said that it beat the Canon in all counts, including flare and sharpness. Most impressively, he said that the bokeh was fantastic and without the usual harsh outlines, throughout the frame. It seems that Sigma has made bokeh the overriding goal of the lens, and that the over-sized front element wasn't for show at all. He recommends the lens to users of both FF and APS-C systems.
There were a couple of the f1.4 shots that had "gauze" (the one of the flowers, and the one of the train station sign), but others that were very sharp and without that haze. I would need to see a side-by-side with the Canon 50/1.4 to really appreciate the difference, but all in all, I think it is a pretty amazing optic (if you are of the mindset that the sharpness and contrast of a typical over-corrected Japanese lens should be traded off for better bokeh). The bokeh is really the best I have ever seen from a sub 85mm lens.