Leica aspherics - Edit

Original post

Googling aspherics and I came across an interesting post on the LEICA Barnack Berek Blog by Heinz Richter reporting on Leica's manufacture of aspheric lenses

The interesting insights for me were :

• Optical glass types
• Tolerances
• Manufacturing processes of aspheric lenses
• The effects of polymer molecules on light diffusion
• Labour intensivity of assembly and manufacture
• The reason why aspheric lens manufacture remains in-house

Edit - I thought the article was worthy of a wider audience and posted a link to the article on the FredMiranda Alt Forum. The thread received a reply from Brandon Dube, that was comprehensive in its commentary on the article and manufacture of aspheric lenses and disappointingly the LEICA Barnack Berek Blog article contains a few inaccuracies. It is well worth reading Brandon's reply for the quality of information and insight given, the link is here.

A video from the FM post on lens manufacture