Archived posting to the Leica Users Group, 2007/03/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]thanks Don. I have relatively early 21 and 24 mm asph lenses which I am happy with. I am lucky/foolish enough to have both one of the original 35 f1.4 asphericals with 2 ground surfaces and one of the newer ones (don't ask) with a pressed asph surface. I prefer the original though theoretically there is only a small difference. It is my most used M lens. Frank On 13 Mar, 2007, at 13:47, Don Dory wrote: > Frank, > They inferred that they were grinding all their lenses. Your specific > question did not get asked, but they gnomes did spend a fair bit of > time > talking about introducing new CNC derived equipment to reduce > variability in > components. > > On 3/13/07, Frank Dernie <Frank.Dernie@btinternet.com> wrote: >> >> You probably can not answer this :-) but are the lenses which were >> designed with the hot pressed ASPH elements such as the 21, 24, 35 f2 >> and second 35 f1.4 still hot pressed and the later lenses with larger >> diameter asph elements ground, or have they changed the manufacturing >> method of the asph elements in these as well? >> Frank >> >> On 13 Mar, 2007, at 03:23, Mark Rabiner wrote: >> >> > On 3/12/07 11:05 PM, "Don Dory" <don.dory@gmail.com> typed: >> > >> >> Mark, >> >> It was a variant of computer controlled grinding. Better control >> >> and much >> >> tighter tolerances. >> >> >> >> Enjoy >> >> >> >> On 3/12/07, Mark Rabiner <mark@rabinergroup.com> wrote: >> > >> > Yep you were standing to the right of me. >> >>> >> >>> But I seem to recall a discussion at the Leica factory a few >> >>> months back >> >>> about 5 people standing around with Christian Erhardt in a >> >>> hallway, could >> >>> have been a jet lagged hallucination. >> >>> >> >>> Mark Rabiner >> >>> 8A/109s >> >>> New York, NY >> >>> >> >>> markrabiner.com >> >>> >> >>> >> >>> >> >>> _______________________________________________ >> >>> Leica Users Group. >> >>> See http://leica-users.org/mailman/listinfo/lug for more >> information >> >>> >> >> >> >> >> > >> > >> > Mark Rabiner >> > 8A/109s >> > New York, NY >> > >> > markrabiner.com >> > >> > >> > >> > _______________________________________________ >> > Leica Users Group. >> > See http://leica-users.org/mailman/listinfo/lug for more >> information >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > > -- > Don > don.dory@gmail.com > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information