Scott in NC, on 24 Dec 2018 - 7:44 PM, said:
TEC and AP certainly do make lenses. Taking a glass blank (which by itself isn't really useful for anything), then grinding, figuring, and polishing it into a lens, certainly qualifies as "making a lens." If we can't say that those companies make lenses since they didn't make the original glass, then we might as well go to the extreme of saying that Ohara, Hoya, etc. don't make glass since they didn't produce the original raw materials (sand, etc.) from which the glass was made. But doing so would be ridiculous.
LZOS make lenses...
TEC, AP takes the thread at in a middle proccess and then put a “ all made in house “ sticker.
Polishing is not even the most revelant proccess, in fact is one of the most automated (if not one want introducing a zonal error to sell it as high quality aspherized ;-) ), there is not much space into improvement / ingenuity. Lens assembly is more relevant for instance.
Edited by edif300, 24 December 2018 - 07:51 PM.