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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. 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.

  4. Lens mount - Wikipedia

    en.wikipedia.org/wiki/Lens_mount

    A lens mount is an interface ... Screw Photography Asahiflex: M42: 45.46 mm 35 mm: 42 mm ... specifies the optimum flange back length required to reduce camera size ...

  5. Helios (lens brand) - Wikipedia

    en.wikipedia.org/wiki/Helios_(lens_brand)

    The next step in the modernization was the transition from the M39 to M42 threaded mount due to the transition of SLR cameras to the M42 × 1 threaded connection with a working length of 45.5 mm, which corresponded to the threaded connection common in the world. The lens received a new name Helios-44-2, and the body became completely black.

  6. Schneider Kreuznach - Wikipedia

    en.wikipedia.org/wiki/Schneider_Kreuznach

    150 mm (15 cm) f/4.5 C-mount - completely different design than the following 150mm f4.5 C-mount lens - this lens has a black and silver barrel - older in design appearance 150 mm f/4.5 Tele-Xenar for C-mount - very well crafted lens barrel, different in appearance than other lenses in the Tele-Xenar series except the 75mm f/3.8 C-mount lens ...

  7. Krasnogorsk-3 - Wikipedia

    en.wikipedia.org/wiki/Krasnogorsk-3

    There are two different lens mounts used on the Krasnogorsk-3: the M42×1 lens mount, and a Russian bayonet mount. 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