Nice lens from an IQ standpoint. Garbage lens from a mechanical reliability standpoint. Dropped it from my bag to the couch cushion - the autofocus stopped working. This is a known issue with this lens. Got it fixed, used it in slightly cold weather (not below freezing), the autofocus stopped working again. I am done with this lens. Stick with the nifty fifty version (f1.8) - that thing is indestructible and if it breaks, who cares - it is a hundred bucks.