I ordered the zoom lens with USM and got the basic lens weeks after and sent many calls with bad voice mail and emails ignored. Then I talked to the guy and explained it and he says you must return that lens and he will ship the correct one. I was honest and quick to ship it back at my expense but that was mistake. Then the emails and calls were even worse or not going anywhere but got thru once and he says will refund money as he has no lens that I ordered. That was month a ago and no money back and phone and emails not answered. I reported to BBB and they tried a few times and gave up but BBB is not much better of an outfit. MT in Richardson TX.