Hey guys I need help with this lens. No matter how much I afma I can not get this lens to be sharp on my 5d markii. It's really annoying when you have such an amazing lens and it won't focus accurately. Now I can't place all the blame on it because every lens on my camera is at about +14. So obviously my camera is off also. Can I send the 5d markii out to canon? Or it and lenses? I am worried I am just going to get it back and try are going to say they are all within our specifications.