Lens Sharpness Variation

[BillOz]

Here's an interesting article about the perceived sharpness of different copies of a given lens model.
Certainly there will be those who disagree, but this guy has nothing to gain from any point of view, and has a lot of expereince and expertise.

http://www.dpreview.com/articles/7333489584/variation-facts-and-fallacies

[Jay Beckman]

No argument here...

I've read this article in a couple of different places and he's right on the money.

There are manufacturing tolerances, not manufacturing absolutes...