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  2. List of Leica lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_Leica_lenses

    Leica 50 mm f /1.4 Summilux-R 3rd version – 1997 (ROM contacts) 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 ...

  3. Leica Vario-Elmarit-SL 24-90mm F2.8-4 ASPH - Wikipedia

    en.wikipedia.org/wiki/Leica_Vario-Elmarit-SL_24...

    The Leica Vario-Elmarit-SL 24-90mm F2.8-4 ASPH is an interchangeable standard zoom lens for Leica L mount, announced by Leica on October 20, 2015. [1]A review in PCMag UK praised the lens for its sharpness, low distortion and weatherproof, optically stabilised design, while also drawing attention to its vignetting of up to 5.5 stops at 24mm.

  4. Elmar (lens) - Wikipedia

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

    Elmar lenses have a maximum aperture ranging between f/2.8 and f/4. Current Elmar lenses have a maximum aperture of f/3.8 or f/4, as in the Elmar-M 24 mm f/3.8 and Tri-Elmar-M 16-18-21 mm f/4. [1]

  5. Category:Leica lenses - Wikipedia

    en.wikipedia.org/wiki/Category:Leica_lenses

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  6. M39 lens mount - Wikipedia

    en.wikipedia.org/wiki/M39_lens_mount

    The M39 lens mount is a screw thread mounting system for attaching lenses to 35 mm cameras, primarily rangefinder (RF) Leicas. It is also the most common mount for Photographic enlarger lenses. True Leica Thread-Mount (LTM) is 39 mm in diameter and has a thread of 26 turns-per-inch or threads-per-inch (tpi) (approximately 0.977 mm pitch) of ...

  7. Maddox rod - Wikipedia

    en.wikipedia.org/wiki/Maddox_rod

    The test is based on the principle of diplopic projection. [1] Dissociation of the deviation is brought about by presenting a red line image to one eye and a white light to the other, while prisms are used to superimpose these and effectively measure the angle of deviation (horizontal and vertical).

  8. Leica minilux - Wikipedia

    en.wikipedia.org/wiki/Leica_minilux

    The Leica minilux is the first in a series of four luxury titanium-clad point and shoot cameras that were produced by Leica Camera starting from 1995; it is equipped with a high-quality lens and body to compete with similar premium compact cameras produced during the Japanese bubble-economy era, including the Contax T line, Konica Hexar, Nikon 28Ti/35Ti, Minolta TC-1, Ricoh GR series, and ...

  9. Likelihood ratios in diagnostic testing - Wikipedia

    en.wikipedia.org/wiki/Likelihood_ratios_in...

    This hypothetical screening test (fecal occult blood test) correctly identified two-thirds (66.7%) of patients with colorectal cancer. [ a ] Unfortunately, factoring in prevalence rates reveals that this hypothetical test has a high false positive rate, and it does not reliably identify colorectal cancer in the overall population of ...