Archived posting to the Leica Users Group, 1999/01/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I just read in the M6 version of Leica Fotografie International, about the 12 ASPH, "one element with an aspheric GLASS surface". So we know at least one surface is glass! The discussion about the 24 ASPH implies a glass ASPH. Jim At 06:08 PM 1/24/99 -0800, you wrote: >Lucian Chis wrote: >> >> If I am not mistaking, the cost of older ASPH lenses was dictated by GLASS >> aspherical elements whereas newer ASPH have PLASTIC molded aspherical >> elements. Even for Leica. I don't know the particulars, but I would think >> you can't get the same refringency index from plastic as from heavy glass >> (glass with rare earth components). >> What do you guys know of this? >> >> Lucian >> >snip' >I hope you've got an asbestos spacesuit with a thick fireproof glass >visor because if you are insinuating the existence of plastic elements >in Leica M or otherwise glass you can say goody to your eyebrows. >Mark Rabiner :-) >