In general, for my money - amazing glass, but I will contact the store about holes in the diaphragms, I do not exclude that the trouble is in my model) Pros: It is assembled as well as possible, gravity plays only a plus, micro-shakes, aperture, sharpness across the entire field of the frame are gone. Cons: Aperture from 2 to 2.8, which is very sad. The camera immediately stops catching the face and eyes normally, which is a huge problem for Sony (as for the camera that I originally took for focus)