I have on ocasion had several people attempt to sell us "in house lens moulding machines). We have declined for amoung other reasons our volume doesn't support it. However part of the hype from the sales people state it makes a "good mid-index lens."
My Question: What is thier mid-index material made of? Poly, polyurathane, urathane, CR-39(not) what?
Chip
Bookmarks