Archived posting to the Leica Users Group, 1999/11/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 11:17 AM 11/18/99 -0500, TEXWORKER@aol.com wrote: >. The longer the lens the more spread >you get in the visual spectrum of light where as asph and flourite lens tend >to make them come to focus at the same point You are confusing aspherical correction, which benefits wide lenses, with apochromatic correction which benefits longer lenses. Anything shorter than 90mm or 100mm really won't benefit from Apo correction, while anything much longer than that won't benefit from aspherical elements. And very few lenses (mostly Canon) have fluorite crystal elements. Eric Welch Carlsbad, CA http://www.neteze.com/ewelch Make it idiot proof and someone will make a better idiot.