I use it on a Pentax K-30. Excellent dive at full aperture, even at the edges, especially from f / 4. Excellent color rendering. Some slight chromatic aberration, bokeh lacks a little soft but nothing very annoying. Anyway, much better optically than the Pentax 16-50, 3x more expensive. Only defects, no internal engine (so noisy). Many blame his side a little cheap plastic, but having done heavy fall, he held the shock without problem, to my amazement elsewhere. In short, at that price, there is no photo;)