How does that go......"for every two fold increase in leads per inch on the side of the package the magnification power of the head visor must be increased by two"....?

Michael Karas


By the way,,,,for anybody that does not now use these for close up soldering work should consider getting a visor. Here is a link to the original and premium manufacturer of the OptiVisor.

http://www.doneganoptical.com/catalog/opti/

MJK