Archived posting to the Leica Users Group, 1996/01/31
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Max Berek began the design philosophy of retaining some residual aberration in the lens design to ensure a diffused effect on out-of-focus images. This continued to be the Leitz/Leica policy until very recently; they may have changed it under their new Director of Advanced Design, who has caused Leica to eschew the "Final Image Quality" test for the more conventional means of analysis. A good read is the intro to Rogliatti's _Leica and Leicaflex Lenses_ where one of the Leitz optical whizes from the later 1970's explains this. Marc msmall@roanoke.infi.net FAX: +540/343-7315 Cha robh bas fir gun ghras fir!