> Cameras probably just don't require such precision. Depends on the camera. I think if we combine both of your comments, we get a more clear picture of reali

> Cameras probably just don't require such precision. Depends on the camera. I think if we combine both of your comments, we get a more clear picture of reality: we've had the ability to manufacture one instance of something with precision for a while, but not the ability to do so consistently, reliably, or quickly. i.e. tolerances have shrunk dramatically over the past century or so, along with time needed to produce things with such low tolerances. However, while that is generally true across the board, tolerances haven't all gotten to the same place! Materials involved, costs, time to build, and need for low tolerances still largely affect all of it, of course. And for some things, individual variations are even considered desirable.