Archived posting to the Leica Users Group, 1999/09/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Art Sala wrote: > Ken: > > I heard that Zeiss is the only lens manufacturer that has the ability > to grind glass aspheric elements. Then again, I don't know if it matters > (photographically speaking) whether the aspheric element is ground glass, > moulded plastic or some sandwiched hybrid. Maybe some other lug lens > guru can give more technical insight. > > Cheers, Arturo > Arturo, I believe Leitz ground the Aspheric glass lenses in the first Noctilux 1.2 in house. The way I heard it, they where the first to do it for a mass produced lens. I also don't think, that any of the later aspheric lenses contain only molded instead of ground lens elements. I suppose it makes sense, to buy the pre-moulded aspheric elements and then do the final grinding in house. I am sure if you ask Marc Small or Erwin Putz, they will be able to trough some more light on to the subject. Regards, Horst Schmidt