{"title":"C-Mount","description":"\u003cp\u003e\u003cspan\u003eA \u003c\/span\u003e\u003cb\u003eC mount\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003eis a type of\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Lens_mount\" title=\"Lens mount\"\u003elens mount\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ecommonly found on\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/16_mm_film\" title=\"16 mm film\"\u003e16 mm\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Movie_camera\" title=\"Movie camera\"\u003emovie cameras\u003c\/a\u003e,\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Closed-circuit_television_camera\" title=\"Closed-circuit television camera\"\u003eclosed-circuit television cameras\u003c\/a\u003e,\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Machine_vision\" title=\"Machine vision\"\u003emachine vision\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ecameras and\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Microscope\" title=\"Microscope\"\u003emicroscope\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ephototubes.\u003c\/p\u003e\n\u003cp\u003eC-mount lenses provide a male thread, which mates with a female thread on the camera. The thread is nominally 1 inch (25.4 mm) in diameter, with 32 threads per inch (0.794 mm\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Screw_thread#Lead,_pitch,_and_starts\" title=\"Screw thread\"\u003epitch\u003c\/a\u003e), designated as \"1-32 UN 2A\" in the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/ANSI\" class=\"mw-redirect\" title=\"ANSI\"\u003eANSI\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eB1.1 standard for\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Unified_Thread_Standard\" title=\"Unified Thread Standard\"\u003eunified screw threads\u003c\/a\u003e. The\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Flange_focal_distance\" title=\"Flange focal distance\"\u003eflange focal distance\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eis 17.526 millimetres (0.6900 in) for a C mount.\u003c\/p\u003e\n\u003cp\u003eMerely to say that a lens is \"C-mount\" says very little about the lens's intended use. C-mount lenses have been made for many different formats. C-mount lenses are built for the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/8_mm_film\" title=\"8 mm film\"\u003e8 mm\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/16_mm_film\" title=\"16 mm film\"\u003e16 mm film\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eformats and the 1\/3\", 1\/2\", 2\/3\", 1\", and 4\/3\" video formats, which corresponds to a range of image circles approximately from 5 to 22 mm in diameter.\u003c\/p\u003e\n\u003cp\u003eDepending on the format, the design of the lens and its performance will differ considerably. For example, for the 4\/3 format, a 12 mm lens is a wide-angle lens and will have a\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Retrofocus\" class=\"mw-redirect\" title=\"Retrofocus\"\u003eretrofocus\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003edesign. For the 2\/3-inch format, a 12 mm lens is \"normal\" and can have a simple and fast double Gauss layout. For the 1\/3-inch format, a 12 mm lens is long and can have a telephoto design.\u003c\/p\u003e\n\u003cp\u003eSome TV lenses lack provision to focus or vary the aperture, so may not operate properly with film cameras. Also, some TV lenses may have bits that protrude behind the mount far enough to interfere with the shutter or reflex finder mechanisms of a film camera.\u003c\/p\u003e\n\u003cp\u003eAlthough C-mount lenses have a back focal distance far too short to be used with 35 mm film SLRs or any existing digital SLR (except some\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Mirrorless_camera\" title=\"Mirrorless camera\"\u003emirrorless cameras\u003c\/a\u003e, e.g. Canon\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/EOS_M\" class=\"mw-redirect\" title=\"EOS M\"\u003eEOS M\u003c\/a\u003e), they can be mounted on interchangeable-lens mirrorless digital cameras such as the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Micro_Four_Thirds_system\" title=\"Micro Four Thirds system\"\u003eMicro Four Thirds\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eused by Olympus and Panasonic. However, the vast majority of C-mount lenses produce an image circle too small to effectively cover the entire sensor which has approximately 22 mm diagonal, this produces\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Vignetting\" title=\"Vignetting\"\u003evignetting\u003c\/a\u003e.\u003csup id=\"cite_ref-1\" class=\"reference\"\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/C_mount#cite_note-1\"\u003e[1]\u003c\/a\u003e\u003c\/sup\u003e\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Nikon_1_series\" title=\"Nikon 1 series\"\u003eNikon 1 series\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Pentax_Q_series\" title=\"Pentax Q series\"\u003ePentax Q series\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ecan use C-mount lenses without vignetting.\u003c\/p\u003e\n\u003cp\u003eC mount was created by\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Bell_%26_Howell\" title=\"Bell \u0026amp; Howell\"\u003eBell \u0026amp; Howell\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003efor their Filmo 70 cine cameras.\u003csup id=\"cite_ref-2\" class=\"reference\"\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/C_mount#cite_note-2\"\u003e[2]\u003c\/a\u003e\u003c\/sup\u003e\u003cspan\u003e \u003c\/span\u003eThe earliest Filmos had slightly different mounts, known as A mount, and B mount. C mount was found on Filmo 70 cameras with serial numbers 54090 and higher,\u003csup id=\"cite_ref-3\" class=\"reference\"\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/C_mount#cite_note-3\"\u003e[3]\u003c\/a\u003e\u003c\/sup\u003e\u003cspan\u003e \u003c\/span\u003eprobably from about 1926. Soon after, other camera manufacturers adopted the same mount, and it became a\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/De_facto_standard\" title=\"De facto standard\"\u003ede facto standard\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003efor 16 mm cine cameras.\u003c\/p\u003e\n\u003c!----\u003e","products":[],"url":"https:\/\/www.wow-optic.com\/collections\/c-mount-lenses.oembed","provider":"WOW Optic","version":"1.0","type":"link"}