Archived posting to the Leica Users Group, 1997/10/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The modern technique of blank molding of aspherical elements was developed by Docter Optic Technologies of Wetzlar (now, WHY does that name sound so familiar?). I believe this technique has been licensed to Leica and Zeiss. Blank molding is just that: the elements are cast in molds constructed with great precision on an aspherical form. The lens elements still require polishing, of course. I have a pair of the Docter Aspherical 10x40 BGA binoculars -- nice glasses AND they outperform those Chicago Cubs of the birding world, the Zeiss 10x40 BGA's, which I also own. Docter bought out the old Eisfeld plant, the Carl Zeiss Jena binocular works, when the Zeiss entities combined upon the reunification of the Germanies. When the owner -- the eponymous Mr Docter -- passed on, the company was split, the binocular & riflescope division being now independent of the rest of the concern. Marc msmall@roanoke.infi.net FAX: +540/343-7315 Cha robh bas fir gun ghras fir!