I had to buy a USB docking station to set the autofocus to normal operation (without adjustment, the lens missed the target by 10-15 cm when shooting a portrait). but after setting it began to hit exactly the target. I put "5", the purchase is completely satisfied. With its pros. Sharp picture, fast focusing, high detail, beautiful bokeh with even circles. Got cons: When shooting at an open aperture, a very narrow zone of sharpness. The lens is heavy. Over time, you get used to the shortcomings and stop noticing.