Archived posting to the Leica Users Group, 1999/09/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi! If my memory serves me correctly on the 450mm was "solid cat" and the rejection rate was so high they dropped it fairly soon. No, catadioptric - mirror - lenses do not need aspherical elements and not many have them - but I´m not an expert on this. All the best! Raimo Photos at http://personal.inet.fi/private/raimo.korhonen - ---------- > From: Frank Filippone <red735i@earthlink.net> > To: leica-users@mejac.palo-alto.ca.us > Subject: RE: [Leica] Plastic Aspheric Lens Elements > Date: 12. syyskuuta 1999 16:22 > > This is an old lens... the Vivitar Solid Cats from the 70's. They sold a > 600, 800 and maybe an 1100 MM. Later there was a 450MM. > All used plastic front elements, and I believe that the design of a > catadioptric lens requires a non-spherical front element. Produced by > Perkin Elmer of Connecticut. > > I think these were the first high performance consumer (non military and > non-underwater) lenses so designed with plastic Aspherical elements. > > Frank