Archived posting to the Leica Users Group, 2008/01/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Since when do they use this designation? All the best! Raimo K Personal photography homepage at: http://www.uusikaupunki.fi/~raikorho ----- Original Message ----- From: <wildlightphoto@earthlink.net> To: "Leica Users Group" <lug@leica-users.org> Sent: Saturday, January 05, 2008 3:17 PM Subject: Re: [Leica] The Tele elmarit 135 Is So A Real Pooch of a Lens > Raimo K <raimo.m.korhonen@uusikaupunki.fi> wrote: > >>APO means apochromatic correction of the lens, there are no apochromatic >>elements. > > In Leica's case, APO is the designation they use for the extra-low > dispersion glass which their optical designers feel is essential to > designing lenses with apochromatic performance. This is like Nikon's use > of the ED designation for their extra-low dispersion glass. Raimo is > correct that there are no apochromatic elements, but there is APO glass > which is used to design apochromatic lenses. > > > > Doug Herr > Sacramento > http://www.wildlightphoto.com > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >