>>2878567EXIF says 50mm 1.8, so I'm guessing it's the plastic fantastic. Pic related is from a review of the lens and you can see it's not a looker in the bokeh department in itself.
However, the real problem with that photo is the gratuitous amount of clairity added, which often has a detrimental effect on bokeh quality, even if the lens normally produces good blur.
