Seems like the power zoom lens has some issues. See the review comments from "imaging-resource.com" Unfortunately, the Power Zoom kit lens has a couple of quirks that mean we can't recommend it, unless shake-free video is your main goal. As we noted in our Lumix GX1 review, a vibration-induced blur issue means you have to pay close attention to your shutter speeds when shooting at telephoto. It's frustrating, it does crop up in real-world shooting, and it will cause occasional soft results if you simply leave the camera in Program mode. We' re also not fans of the zoom and focus rocker placements on the lens barrel. Still-image shooters will definitely find the non-Power Zoom lens to be a better choice, even if it's a shame to lose the Power Zoom's size advantage.