Archived posting to the Leica Users Group, 1998/06/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]In theory, it means sharper images and no chromatic abberations. For a simple illustration of what happens to white light when it's refracted through a non-apochromatic substance, see the cover illustration of Pink Floyd's "Dark Side of The Moon" :-) Jeff - -----Original Message----- From: Dan Cardish <dcardish@microtec.net> To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us> Date: Friday, June 05, 1998 6:02 PM Subject: Re: [Leica] Leica Nomenclature >At 03:46 PM 05-06-98 -0800, Charlie wrote: >> >>>and what does "APO" mean ? >> >>APO is short for apochromatic which should mean that a point of white light >>entering the lens is focussed on the film as a point of white light and not >>a point of white light with colored edges where the light has been bent >>differently according to its frequency. > >Ah, but it doesn't actually answer the question, "what does APO mean?" I >would like to know this as well. > >Dan C. >