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CS-mount has a flange focal distance of 12.526 millimetres (0.4931 in), [4] [5] compared to 17.526 millimetres (0.6900 in) for a C mount, but is otherwise the same as C-mount, including the fact that lenses for many different formats are made for it. CS-mount lenses are built for the smaller formats, 1/2 inch and down.
A lens mount is an interface – mechanical and often also electrical – between a photographic camera body and a lens. ... "Size of the 4/3-type Sensor: The ...
For example, a 28 mm lens is a wide angle lens on a traditional 35 mm camera. But the same lens on an APS-C camera, with a lens factor of 1.6× (relative to a standard full-frame 35 mm format camera), has the same angle of view as a 45 mm (28 mm × 1.6 lens factor) lens on a 35 mm camera—i.e. a normal lens. [20]
The first in the C series, the Mamiyaflex C, was introduced in 1957 as a follow-on to the earlier Mamiyaflex line, which had included the Automat A (1949) and Automat B (1954); the primary innovation of the C was the introduction of an interchangeable lens mount. The Mamiyaflex C was accompanied with 80mm, 105mm, and 135mm lenses.
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.
Comparison of image sensor sizes, including Nikon DX. The Nikon DX format is an alternative name used by Nikon corporation for APS-C image sensor format being approximately 24x16 mm. Its dimensions are about 2 ⁄ 3 (29 mm vs 43 mm diagonal, approx.) those of the 35mm format.