Archived posting to the Leica Users Group, 1996/10/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]++++++++ The color and contrast that a lens can see gives it the "character" you were talking about. This is done with glass makeup (chemical additives) not the phisical shape. The coating may indirectly help this ability by absorbing stray light, but the refractive index and material makeup of the glass gives it character. John +++++++++++ All true. So, to be literal, it is is the quality and composition of the glass, in addition to its shape, that sets Leica optics apart. Is there an objective benchmark against which to measure those parameters? George Zachar