Excellent resolution across the frame at a covered aperture. Good bokeh. The drawing is pleasant. Fast focus. Stabilizer. Convenient size. Yes, there is a certain amount of XA, but they quite successfully choke on cameras when shooting in JPEG, this does not bother me personally. As for the price - against the background of the price of Zeiss 24 / 1.8 or 16-70 / 4, the price of this lens seems to be very justified.
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