Leica R system User manual

Description of the LEICA R-lenses





The user of precision optical instruments in   mance. All LEICA R-lenses may be used at full
science and technology is aware of the achie-    aperture.
vements of modern glass technology in lens
composition. The creative lens designer takes
advantage of modern design techniques toge-
ther with computer technology to gain new in-
sights and to optimize the properties of glass
in the creation of optical systems whose per-
formance characteristics are at the limits of
physical possibilities.  All LEICA R-lenses have
been computed with most modern technolo-
gy. Caref u lly matched anti-ref    I ectio n coati n gs
on highly refractive glasses - glasses which
were practically all developed in the factory's
own glass research laboratory - assures al-
most 100% light transmission within the entire
visible spectrum. The additional ultraviolet
light is further absorbed by means of UV ab-
sorbing ,,Absorban" cement layers. This alsoensures that all lenses maintain the same co-  ERNST LEITZ WETZLAR G M BH
lor transmission, regardless of focal length.    D-6330 Wetzlar,Tel. (O 64 41) 29-0, Telex 4 83 849 leiz d
The optical systems have been matched to    Subsidiary: Ernst Leitz (Canada) Ltd., Midland, Ontariorender colors true to the original. Even at full
aperture, the residual aberrations of the                                 --l                                                                                                                      -r ss    .ogl.      Printed in W-GermanyLEICA R-lenses have been corrected so well   List lri-ttthat in practice they do not affect the perfor-                                              X/81/AY/w.