Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bad performance - not recommended

The lens is okay only in low ranges. The motor is pretty noisy. The lock feature for the lens is good. But if you do not lock it and the lens is dangling, the tube slides to its maximum length on its own. The focus at high zoom is pretty bad, the autofocus would go to one side completely, then the next side before it focuses properly. If you try to move the lens on AI-Servo, you can feel the third party lens not integrated properly.