I had imagined harder to get me a subject in focus. But I must say that for me the true distance scale and is well calibrated. Distance estimated adjusted fit. It is nice that this lens has an incredibly large depth of field. In general, the focus of my lens is very good. The optical performance is on a par with the more expensive 'Canon L' - models.
Yes, the distortions often described (and vignetting) there, but absolutely keep within limits and never bother me really.
A great plus is that this lens is fully compatible format. On my Canon 6D there is there at the corners slight shadow, but I could eliminate with Lightroom easily again, if I wanted it for.
Photography is how I find with this Obketiv hassle free. If one wishes a camera sets the aperture priority and to a selected aperture and the lens.
All in all a really cheap but high-quality bargains.
