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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 1st version; Leica 50 mm f /1.4 Summilux-R 2nd version; 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

  3. 1951 USAF resolution test chart - Wikipedia

    en.wikipedia.org/.../1951_USAF_resolution_test_chart

    A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.

  4. Summarit - Wikipedia

    en.wikipedia.org/wiki/Summarit

    The Summarit was initially introduced as Leica's fastest lens in 1949 with a maximum aperture of f/1.5. Since then, the Noctilux and Summilux named lenses have superseded this old aperture. [1] On 3 August 2007 Leica revived the name and announced a series of less expensive lenses, the Summarit-M.

  5. Elmar (lens) - Wikipedia

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

    Leica 35–70 mm f /3.5 Vario-Elmar-R zoom (Minolta design and glass production) Leica 70–210 mm f /4.0 Vario-Elmar-R zoom (Minolta design and glass production) Leica 75–200 mm f /4.5 Vario-Elmar-R – 1976–1984 (Minolta design and glass production) Leica 80–200 mm f /4.5 Vario-Elmar-R zoom; Leica 80–200 mm f /4.0 Vario-Elmar-R zoom

  6. Eyeglass prescription - Wikipedia

    en.wikipedia.org/wiki/Eyeglass_prescription

    This specifies the part of the prescription designed primarily to improve far vision. In a bifocal lens, this generally indicates what is to be placed in the top segment. NV is an abbreviation for near vision. This may represent a single-vision lens prescription to improve near work, or the reading portion of a bifocal lens.

  7. Noctilux - Wikipedia

    en.wikipedia.org/wiki/Noctilux

    A Leica M8 with a Leica Noctilux-M 50mm f/1 lens. Optical Diagram of Leica Noctilux 50mm f/0.95 ASPH lens. detailed view. The name Noctilux is used by Leica to designate their camera lenses with the widest maximum aperture. Lenses with that name have been in production since 1966. So far all Noctilux lenses have been made for the Leica M mount.

  8. Summilux - Wikipedia

    en.wikipedia.org/wiki/Summilux

    Leica Summilux-M 50 mm f /1.4 Version 2 (1961 – 1968) Leica Summilux 35 mm f /1.4 Version 1 Optical Diagram of Leica Summilux-R 50mm f/1.4 II lens.. The name Summilux is used by Leica and Panasonic Lumix to designate camera lenses that have a maximum aperture brighter than f/2, typically at f/1.4, but dimmer than f/1.0.

  9. Summaron - Wikipedia

    en.wikipedia.org/wiki/Summaron

    The Leica Summaron 35 mm f/3.5 screw mount introduced in 1948 The Leica M3 with the Summaron 35 mm f/2.8 with its googles, from 1958 Leica Summaron 28 mm f /5.6 introduced in 2016. The name Summaron is used by Leica to designate camera lenses that have a maximum aperture of f/2.8 or f/3.5 or f/5.6.