Archived posting to the Leica Users Group, 2012/03/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Some glass is very expensive to manufacture. The raw materials are not always expensive, though the Flourite and ED type glasses are very expensive, with high refractive index glasses they have to be annealed for several months in order for the refractive index to be constant through the sample. This is an expensive process, and one of the reasons this sort of glass is not much used. FD On 29 Mar, 2012, at 05:40, Richard Man wrote: > It's the Glass myth, notably on the "highly refractive indexed" glass used > in the Noctilux. It's so much more convincing to think that there are > secret ingredients that only the elves of Schott laboratory can have access > to, and that only Leica can purchase. > > Of course it's the optical design, the advantage of the RF design and the > hand assembly tolerance that give Leica lens its magic. The glass itself is > just a small part that everyone can have access to. > > > > On Wed, Mar 28, 2012 at 9:12 PM, Chris Crawford < > chris at chriscrawfordphoto.com> wrote: > >> All glass is cheap. Christ, its just melted sand! Optical glass has other >> ingredients, but it is still very cheap to manufacture. The cost in making >> lenses is in the cost of the precision machinery needed to grind the glass >> to precise curves and the labor needed to assemble them. >> >> -- >> Chris Crawford >> Fine Art Photography >> Fort Wayne, Indiana >> 260-437-8990 >> >> http://www.chriscrawfordphoto.com My portfolio >> >> http://blog.chriscrawfordphoto.com My latest work! >> >> http://www.facebook.com/pages/Christopher-Crawford/48229272798 >> Become a fan on Facebook >>