I have had this lens since inheriting my grandfather's photo equipment. Big, heavy, build quality/feel is excellent, but the optics do not live up to those expectations. Mine looks to be better optically than some examples out there. All taken with my A3000 using a Fotasy Minolta MD to NEX adapter, straight out of the camera set to standard aperture priority. @f4, the f2.8 was real soft and bokeh was busy enough to make you dizzy. f5.6?, forget which, focus is on left flower f5.6 you can really see how it degrades towards the edges in this one.