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  2. List of Leica lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_Leica_lenses

    Leica 60 mm Macro-Elmarit-R 1st version – 1972 – outside bayonet lens hood fitting; Leica 60 mm Macro-Elmarit-R dn2 version; Leica 75 mm f /2.0 Elcan-R code C-341 – extremely rare; Leica 80mm f /1.4 Summilux-R; Elmarit-R 135 mm. Leica 90 mm f /2.8 Elmarit-R 1st version – 1964–1996; Leica 90 mm f /2.8 Elmarit-R 2nd version – 1983

  3. Oil immersion - Wikipedia

    en.wikipedia.org/wiki/Oil_immersion

    Oil-immersion objective lenses look superficially identical to non-oil-immersion lenses. In light microscopy , oil immersion is a technique used to increase the resolving power of a microscope . This is achieved by immersing both the objective lens and the specimen in a transparent oil of high refractive index , thereby increasing the numerical ...

  4. Antibiotic sensitivity testing - Wikipedia

    en.wikipedia.org/wiki/Antibiotic_sensitivity_testing

    The results were difficult to interpret and not reliable, because of inaccurate results that were not standardised between laboratories. [25] Dilution has been used as a method to grow and identify bacteria since the 1870s, and as a method of testing the susceptibility of bacteria to antibiotics since 1929, also by Alexander Fleming. [25]

  5. Leica Camera - Wikipedia

    en.wikipedia.org/wiki/Leica_Camera

    The Leica R4 (1980) and Leica SL2 MOT (1974) The Leica Visoflex II (1960) Leica's answer to the SLR: a Leica Visoflex II on Leica IIIf From 1964, Leica produced a series of single-lens reflex cameras, beginning with the Leicaflex , followed by the Leicaflex SL, the Leicaflex SL2 , and then the R series from R3 to R7, made in collaboration with ...

  6. Elmar (lens) - Wikipedia

    en.wikipedia.org/wiki/Elmar_(lens)

    Leica Tele-Elmar 135 mm 90 mm (9 cm) screw mount lens for Leica. ... www.kenrockwell.com /leica /lens-reviews.htm This page was last edited on 6 July 2024 ...

  7. Leica Digilux 2 - Wikipedia

    en.wikipedia.org/wiki/Leica_Digilux_2

    The main selling point of the Digilux 2 is that it functions in a manner reminiscent of a rangefinder camera; the Leica lens features manual zoom, aperture and focus rings and the shutter speed can be manually adjusted via a dial on the camera. Many users cite the excellent Leica DC Vario-Summicron lens as their reason to purchase.

  8. Walter Mandler - Wikipedia

    en.wikipedia.org/wiki/Walter_Mandler

    Mandler is credited with the design of more than 45 high performance Leica lenses for the Leica rangefinder cameras and Leica SLR cameras, including many landmark designs: Ernst Leitz Canada Elmarit-R 19 mm/2.8 Leica Summicron 50 mm/2 Leica Macro-Elmarit-R 60 mm/2.8 Leica Summicron-R 90 mm/2 Leica Elmarit-R 90 mm/2.8 Apo-Telyt-R 180 mm/3.4 ...

  9. Nocticron - Wikipedia

    en.wikipedia.org/wiki/Nocticron

    Nocticron („Night-time“ from latin nox, noctis „night“ and ancient Greek kronos „time“ [1]) is the brand name of Leica lenses with an extreme speed of f/1.2. Because of the large aperture size and its image stabilisation system it is possible to take images with relatively short exposure time especially in available light situations.