I just got the Canon EF 50mm 1.8f Lens come in today. I've seen several photos on Flickr of the 50mm lens being able to take close-up shots. I've tried taking all kinds of shots. All the shots I've taken aren't that clear and as far as "close-up" shots go, the lens won't even focus on it (it makes some noise as if it's fighting back). I think it's defective because when I first opened the actual shipping box, I noticed my UV filter was out of it's case and out in the shipping box. What would you guys recommend? Should I send it back to Amazon (its a new product) for another? Thanks for your help in advance.