I just received my new <span id="btAsinTitle"]Canon EF 70-200mm f/2.8L IS USM yesterday. Right out of the box I used the zoom. There is more resistance between the 70-100 range than the 100-200 range. Is this a fault? For what I paid, I expect perfection. If this is not normal (and I've never felt a zoom do this) I am going to send it back.