Archived posting to the Leica Users Group, 2004/11/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The WA aspherics have one aspheric surface. This surface is pressed using a technology developed by Hoya and Leica according to Erwin. It is generally the first surface after the aperture. I don't know which surface is aspheric in the new 50 or 90AA. The tri-elmar has more than one aspheric surface. Just what I have read. Frank On 7 Nov, 2004, at 21:47, Mark Rabiner wrote: > On 11/7/04 8:06 AM, "William G. Lamb, III" > <lambroving@worldnet.att.net> > typed: > >> >> Henning, >> >> While in theory that may be the case, I'm not convinced that the LEICA >> pressed asphericals are the equal of the ground versions. In many >> pictures >> I've seen from Frank's lens the results are superior to my 35/2 ASPH. >> Particularly in bright sunlight the results are smoother and the >> colors >> don't become "blocked" in the higher contrast. My 28 ASPH has no bad >> manners that I've yet detected, but I'm never quite sure what I'm >> going to >> get with either of my 35/2 ASPH's. (In all other circumstances, my >> 35/2's >> perform just fine.) Maybe this is just a Leica "thing"? >> >> William >> > I have heard numerous times that Leica has moved beyond the pressed > blank > technology to another one having to do with a lot of laser computer > grinding. That kind of thing I think. > That's ok with me I find the idea of my outer elements shipped in hot > soft > and fresh from Hoya unnerving. > Anyone know about this? > Maybe I dreamed it. > > Mark Rabiner > Photography > Portland Oregon > http://rabinergroup.com/ > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >