You can get some great refurbished lenses from places like B&H, Borrowlenses (I've bought from then before and am extremely happy), Adorama, etc. No lens is covered for physical damage unless you buy an extended warranty. BTW, my 70-200 F/2.8 is a factory refurbished lens is the one I shoot most with. But here's the thing with photography, you are better off with really great glass on a decent body than decent glass on a really great camera body.