For one, I got no idea if that is even true. Heck CP,AP,MS Color and others might have been using the lens themselves to shoot once in while and sell it to the end user. What`s the difference? Too much hearsay is not good, have you seen or experienced it yourself? End point is, is the equipment you bought in a good condition and at a decent price? You need to lighten up. The camera/lens you are using now might have been thru several hands, testing and trying it out.