Yep, my new 10-22 came today! I'm trying to fill out the online form for the warranty, but I don't know where to find the serial number of the lens. Any help? Also, on a side note, does anyone know if just a regular 77mm UV filter will work with the EFS 10-22? The glass bulges out a tiny bit in the front, so I was just wondering if there as a special filter I had to get, or if just any 77mm will work.