Andre Langevin <[EMAIL PROTECTED]> wrote: >As we are talking about the 15mm, and some Takumar and (few) K lenses >(not A) have an aspherical element, the japanese Pentax Lenses Study >Group seems to give a way to distinguish the aspherical lens fron the >non-asp. > >http://www.ucatv.ne.jp/~tweety/SuperWide/K15_35Late/K15_35Late_j.htm
Fascinating! >But there could be a better way to know which lens is ASP: > >http://www.ucatv.ne.jp/~tweety/Report/Comparison15mm/Comparison15mm.htm Notice that both shots were taken with the lens wide open! (Obviously because the exposure time was so long.) There's definitely a difference, but they both seem like damn fine lenses. -- Mark Roberts Photography and writing www.robertstech.com
