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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.
M42 thread mount cameras first became well known under the Praktica brand, and thus the M42 mount is known as the Praktica thread mount.[1] Since there were no proprietary elements to the M42 mount, many other manufacturers used it; this has led to it being called the Universal thread mount or Universal screw mount by many.
Male mount of Minolta MC-Rokkor 58mm 1:1.4 lens with female lens mount of an Minolta XD-7 Lenses sold per year by mount type. A lens mount is an interface – mechanical and often also electrical – between a photographic camera body and a lens.
M42 lens mount, a standard for cameras; In firearms and military equipment: ... M42 is the Unified numbering system code ("miscellaneous nonferrous metals and alloys
T-mount to M42 mount adapter ring. Because the T-mount lenses have a long flange distance of 55 mm and most 35 mm cameras have shorter flange distances, a simple mechanical adapter called T-Ring is needed to adapt a T-mount lens to any camera body without optical correction to achieve its closest focus distance.
Praktica LLC (East Germany)(really December 1969): first interchangeable lens camera with electric contact lens mount, first camera with electromechanical lens diaphragm stopdown control. [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 ...
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 .
Cameras using the M37 lens mount. Ashiflex I (1952–1953) Asahiflex Ia (1953–1954) ... Cameras using the M42 lens mount, also known as the Pentax screw mount.