Panasonic Lumix G X Vario PZ 45-175mm

Hi,

I just received my 45-175mm lens from Amazon today ($216). When I first took out the lens, I noticed there was a rattle sound. When I shake the lens, there is a rattle sound. Is this normal for this type of lens? I can't tried it on my GH1 since I lent my GH1 to a friend.

Also, has anyone have hands on experienced on the 45-175mm vs the 45-200mm in terms of picture quality?

Thanks.