This one is a bit of a puff-piece, but will give you some idea of how it's
done, at a basic level.
https://www.dpreview.com/articles/2764178778/a-focus-on-aspherics-panasonic-lens-factory-tour
Enjoy!
David.
------
Unsubscribe or change to/from Digest Mode at:
http://lrflex.furnfeather.ca/
Archives are at:
//www.freelists.org/archives/leicareflex/