Nicely and securely packaged, great Exif info, razor sharp photos with stunning object resolution. BUT, I'm afraid to hold it. It randomly emits a LOUD buzzing NOISE (loud NOISE) that persists even after the camera is turned off. Only by pulling out the battery was it possible to stop it. I bought this lens for my Sony a7iii. I have Metabones and MC-11 adapters for Canon mount lenses. My Sony a7iii works great with all my other Canon lenses and older lenses (including the IRIX 15mm). Of course,