I have my picky hat on today. While I am pleased for the early review, someone should remind the author that the K-S1 is not the oldest body that supports K
AF4 electronic aperture actuation/control. That honor falls to the K-50. The conflation of CA with purple fringing is forgivable, but only barely; missed focus on a lens test, however, is inexcusable. To be honest, I am still not sure what the intended plane of focus was on the first set of photos, nor am I sure that the image used for the full frame was the same as for the detail or that focus was not adjusted between frames. My advice...fall back to manual focus in live view and don't touch the focus ring until the aperture series is done.
Yes, I am a bit disappointed, but it is only the first review.
Steve
(...to the model, "Souriez pour la caméra, s'il vous plaît"? )