Search:

Ron i think the best edge we could see between 20-100x. more then that just makes too much magnification.
I don't know have you ever used or seen electron microscope but i was luck couple of time....

Microscope is a very helpful tool. If person knows how to use it.
if you are trying to figure out by watching to the bevel how sharp your blade is then Sorry that is not microscopes mistake.
if...