Admittedly, I don't shoot Pentax anymore, but in my line-up, I still keep that nifty A 50/1.2. Recently, I've discovered a quality of this Pentax that I've not seen before, the ability to render 3D. I know this lens is not that strong at long distance shot due to aberration, which helps to produce the smooth bokeh. However, at moderate distance, it can produce stunning result. Short distance, it's sharp, and buttery.
I shot this with my Sony A900. I just hope that this would help out some of you on the fence right now looking to buy this lens. It's simply breathtaking on full frame.
3Dish:
Sharp, buttery close shots:
Painterly rendering at far distance: