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  2. M42 lens mount - Wikipedia

    en.wikipedia.org/wiki/M42_lens_mount

    The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch .

  3. History of the single-lens reflex camera - Wikipedia

    en.wikipedia.org/wiki/History_of_the_single-lens...

    [218] [406] [407] Had M42 screw mount modified for open aperture metering. The M42 mount was a very popular interchangeable lens mount system for a quarter century. It was used by almost two dozen different SLR brands, most notably Asahi Pentax. [408] (Asahi became so closely associated with this mount that it was, and still is, often ...

  4. Lenses for SLR and DSLR cameras - Wikipedia

    en.wikipedia.org/wiki/Lenses_for_SLR_and_DSLR...

    The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch.

  5. Krasnogorsk-3 - Wikipedia

    en.wikipedia.org/wiki/Krasnogorsk-3

    The stock lens is the f/1.9 17–69 mm zoom lens Meteor-5-1, considered by many to be a quality optic. The M42 screw-mount allows for the use of widely available lenses from 35 mm still cameras such as Asahi Pentax Takumar lenses. Cameras which have been modified from the original standard 16mm (double-perforartion) to accept Super 16 (single ...

  6. Lens mount - Wikipedia

    en.wikipedia.org/wiki/Lens_mount

    N/A. Screw mount must be adjusted manually for back focus. Back focal distance from <1mm to 12mm. 1/6" to 1" 12 mm 0.5 mm pitch Screw CCTV, PCB: Edmund Optics μ-Video Bolex Bajonet 23.22 mm 16 mm: Breech lock Cinematography effective focal distance 17.526 mm (0.69 inches) due to beam splitter behind mount flange (accepts C-mount lenses with ...

  7. Pentax K-mount - Wikipedia

    en.wikipedia.org/wiki/Pentax_K-mount

    The Pentax K-mount, sometimes referred to as the "PK-mount", is a bayonet lens mount standard for mounting interchangeable photographic lenses to 35 mm single-lens reflex (SLR) cameras. It was created by Pentax in 1975, [ 1 ] and has since been used by all Pentax 35 mm and digital SLRs and also the MILC Pentax K-01 .