Upload & Sell: On
"When pressed what Sony considered best bokeh, they referred to the a-mount 135 STF."
Well, at least they are upfront about it, can't ask much more. Smoother=better to Sony.
Might be of interest if not already posted:
"Roger Cicala over at LensRentals found the Sony 50mm F1.4 lens to be the sharpest centrally of any 50mm prime, outperforming the 55mm F1.8 ZA. However, peripherally, the 50/1.4 takes a plunge in terms of resolution, and the 55mm F1.8 pulls ahead. In fact, just 4mm out from center in the image circle, tangential resolution (which we assess by considering the highest frequency MTF trace: 50 lp/mm) drops below that of the 55/1.8 (solid purple line). Source: LensRentals Blog"
It's flattish curves are what drives the FE55 images, very different lenses with different main uses.