I recently bought a CanonT50 from my neighbor at his moving sale. It came with several lenses but one of them I don't seem to be able to attach to the camera. I'm assuming it isn't compatible with the camera but I wanted to ask some other people first before I set it aside. The lens I'm trying to attach is Chinar F=28mm (should be a telephoto lens I believe.) The canon camera has a red dot to line up with the lens for attachment and the lens has an orange dot. Also the pins in the back are closer together than my other lenses (hence I think it isn't compatible). Finally, The other weekend I went camping is some pretty rough terrain. I fell down a few times and now this lens as a rattling sound (I'm assuming I broke something inside?) The lens is intact however. Could someone advise me on these situations?