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Leica Rangefinder and SLR Lenses

Leica RF and SLR lenses use the following terms to indicate features of each lens:


  • XYZmm: Focal length
  • f/x.y: Maximum aperture

Lens Mount

  • xxx-R: Lens for the R (35mm SLR) system
  • xxx-M: Lens for the M (rangefinder) system
  • xxx-S: Lens for the S (MF DSLR) system

Lens Speed

  • Noctilux: Fastest lenses with max aperture around 1.0
  • Summilux: f/1.4 lens
  • Summicron: f/2 lens
  • Summarit: f/2.4 or f/2.5 lens
  • Elmarit: f/2.8 lens
  • Super Elmar, Elmar, Tele-Elmar: f/3.4+ lens
  • Telyt: f/3.4 telephoto lens
  • Vario-Elmar: Zoom version of Elmar (see above)


  • ASPH: Lens with aspherical elements
  • APO: Lens with apochromatic correction

Note: There are sometimes small numbers engraved next to the infinity symbol (∞) on the focusing scale. These numbers indicate a difference of the actual focal length of the lens compared to the nominal value in tenths of millimeter. For example, if the number is 14 and the lens is 50mm, the actual focal length is 51.4.

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