I've called Adorama & they are sending a new hood. Man, I hope that's it. You see, when I put the hood on & it seems to lock good, but what I'm talking about is this......it has a little movement where it butts up to the lens itself, sort of back & forth. , just a little, but it drives me crazy. All my other Canon lens hoods don't move at all. I really don't want to send this lens back, cause I'm having way too much fun with it!