Just got the Panasonic Summilux 25mm and while I expected that it might "Rattlesnake" occasionally, (based on everything I have read), this lens is doing it constantly. It seems to be "hunting" and adjusting even when I am not touching the shutter button. The camera is not set to full time auto focus and it does not matter what shooting mode I am in. It annoys me and will probably lead to a sale. Even with the aperture set, as I move the lens and the shutter speed and/or ISO adjusts, the noise continues all the time. As I walk with the camera just a round me neck, the noise continues. I do not recall anyone else having it happen so often. Any advice would be appreciated. Many thanks.