Lens from the must-have series) Mine was acquired with little or no verification - that's how the circumstances developed. Probably lucky, but I did not encounter any soap or AF inaccuracy. As I wrote above, its main purpose is to shoot in places unsuitable for shooting, where it shows all its advantages. Despite the Chinese assembly, it is structurally very good: no backlash, sounds, squeaks. Dust does not swallow. Definitely recommend as a base lens for any FF camera.