The L is a very sharp lens though, some times , I need to be inconspicuous.NOTE: in this digital era , a bit of distortion, color contrast or vignetting is not a serious issue and thus, the most important part of IQ now is resolving power , and thus, it is a great lens for what it is designed to do.I know many L snobs say this is a junk lens but I guess they never ever shoot in Burma or Cambodia w