I got this lens for traveling and now I no longer need it. When zooming it sometimes continues to zoom once you have let go of the ring, a quick flick the other way stops this. it hasn't bothered me so far as it doesn't happen too often and it's not hugely intrusive as it's easy to stop, but it's something to note. I did by the lens and the camera second hand at the same time so there is a chance it's a fault with the camera and not the lens, but I have no other electronic lenses to test this. Apart from that everything works perfectly, and the optics are clear. comes with skylight filter and back lens cap but no front lens cap.