Optical Glass!

[Ranchu]

Learned a lot of hard to find information about optical glasses here. The original, in French. http://www.pierretoscani.com/echo_cristal.html Google translation. http://translate.google.com/transla...w.pierretoscani.com/echo_cristal.html&prev=_t

 

[Nikkor AIS]

Very cool, thanks for the link.

 

[Ranchu]

Glad you liked it, AIS.