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(4) [Minolta (Minolta)】 -------------- When the advent of the 1959 Minolta 135 SLR camera SR-2, MD bayonet fixed, China's "Two Birds" - Seagull and Phoenix also learn Minolta production MD bayonet SLR camera . Early Minolta manual lens MC lens, late, compared with MD lens. Minolta MC and MD lenses are the same kind of mechanical bayonet, MD bayonet years of production and received the body can achieve different functions. MD lens is divided into the earlier MD ROKKOR lens and later MD lenses. MD ROKKOR lens and the lens of MC, manual and aperture priority AE function; MD lens to achieve the dual-priority AE and program AE function. The MD ROKKOR the lens in the lens "Rokkor" and "Minolta MD lenses only marked with a" Minolta ". -------------- Minolta MD bayonet However, early Minolta camera or lens is not outstanding, production integration in the world's first AF SLR camera α7000, whose brightness and glory to peak until 1985. Of course, the price paid for this purpose is to abandon the MD has been in use bayonet instead of MA card port (also called α-mount). Compared with MD mount of MA bayonet inner diameter from 45mm increase to 50mm, the lens aperture ring to cancel instead of the body regulating the exchange of information between the lens and body all rely on the electrical contacts. -------------- [Minolta MA bayonet, that is, α bayonet] Minolta will sell camera business to Sony in 2006, its MA bayonet Sony inherited down, and Sony on this basis, also inherited a lot of Minolta's original lens, and the support of Carl Zeiss ZA automatically focus lens. ==================== (5) [Pentax (Pentax)】 -------------- Pentax is the founder of the Japanese SLR camera, the glory of the SLR king once enjoyed in the 1960s. However, Pentax has been stubbornly follow the M42 screw shortcomings aware of the M42 until 1975 before starting to switch to a K mount. The practice of this slow response, but also make it lost the founder of the throne of SLR cameras. 1975, the switch in the M42 screw-mount Pentax abandoned K-type bayonet ring, PK bayonet, it is also the world using one of the most bayonet, including Ricoh Kai, really good as well as domestic and Phoenix The production of the SLR cameras with PK mount. -------------- [Pentax MF bayonet] Nikon F mount, Pentax PK mount compatibility is very good, and later, such as program exposure, auto focus, power zoom and other new features increase did not abandon the original lens compatible. In addition to rarely several lens, almost all, since the inception of PK bayonet Pentax lens can be common. Early K and KA lenses are manual focus lenses, and later developed by FA and F-series lenses, compared with autofocus lens. Pentax in the original KA-mount an AF connectors and seven electrical contacts, and fully compatible with the original K and KA card port. If the AF lens is mounted on the MF SLR, MF lens is mounted on the AF camera body, in addition to the outside of the AF, the body can all play a lens function. And the evolution of the Nikon F mount, Pentax AF development in the MF - mount design can be described as "maintaining the status quo". -------------- [Pentax AF mount] Early Pentax AF lens is a body-driven, there is no internal focus motor, tube top aperture adjustment ring inside the CPU, there is no novelty. 1991 Pentax introduced the second generation of intelligent AF SLR camera Z-10 and Z-1. The characteristics of these two AF SLR camera with automatic zoom control function also requires the lens should have a zoom motor. Pentax introduced a series AF lenses, the FA (FA Fully Automatic, fully automatic of the meaning), and improved port and the original KAF card, added two more power contacts for power supply to the lens zoom motor. The new lens mount code KAF2, old and new series of AF lenses are compatible. 2003, with the new * ist SLR, Pentax introduced the no aperture adjustment ring of the FA-J series lens. With the release of a variety of digital SLR cameras in Pentax, Pentax has also developed a DA digital-specific lenses (can only be used on APS-C format digital SLR cameras), D the FA Digital traditional general-purpose lens, lens and built-in ultrasonic motors. ==================== [Olympus (Olympus)】 -------------- Olympus is a creative manufacturer, never short of ideas are to make. As early as 1963, Olympus introduced a half frame SLR PEN F, Today is still a lot of collectors aspire to boutique. However, in the 135 SLR camera field, the OM-1 is the mountains of Olympus. In 1972, Olympus released its first 135 SLR camera, named as M-1, due to violation of the registered trademark of Leica M cameras, it changed its name to the OM-1. OM, namely the short title of the Olympus M system, which is also the mouth of the card name. OM-1 is known as the world's smallest SLR, it uses a pentaprism in-depth design of the mirror box, so the body is very small, and the viewfinder is very bright, viewfinder range of up to 97%, combined with the air shock absorber, vibration and sound of the shutter release is greatly reduced, and also has the function of the mirror pre-promotion. OM-1 before and after the production for nearly 15 years, showing its popularity high. -------------- Olympus OM bayonet] However, due to the lack of sufficient technical strength, the only sword easy road Olympus SLR product development after in the development of miniaturized products. From MF to AF in the evolution of Olympus back in 1983 on the launch of the experimental nature of the OM-30, but the first real AF SLR camera OM-707 was released in 1986, and 8 autofocus lens with appearance. OM-707 mount, and the earliest OM-1, the old manual focus lenses can also be used on the OM-707. However, OM-707 sales are dismal, and Olympus to give up the development of the 135 SLR in favor of production ZLR bridge camera. Thus, the OM bayonet came to an end. Olympus 4/3 system mount In June 2003, Olympus's first replaceable lens digital SLR cameras, the advent of E-1. It uses a new 4/3 format, 5 million pixel Kodak CCD and a new lens mount system, which we call the 4/3 mount, and co-ordinated with the Zuiko Digital lens is 4/3 System bayonet. In addition to its own Olympus Zuiko Digital lens, 4/3 bayonet camp also includes the Leica for its partners - the part of the lens of the Matsushita D digital lens and Sigma. ==================== [Kangtaikesi (the Contax)] -------------- Speaking of old rival Leica Contax Zeiss had to Tikal. As mentioned earlier, the Leitz company created in 1913 by 135 cameras, caused a worldwide sensation. In order to compete with the Leica, 1926, Carl Zeiss Zeiss Ikon AG company formed through the acquisition of Ica, Contessa-Nettel, Ernemann and Goerz and three other small camera manufacturers. At an early stage, Zeiss Ikon manufacture many types of cameras, but the failure to develop models of the Leica compete. In 1932, Zeiss Ikon introduced the Contax camera Zeiss lens, it is more expensive than the Leica, focusing accuracy, supporting the lens, not only represents the top machine in the Zeiss Ikon series, and since then, Contax fame, was a great success. In 1945, the Zeiss Ikon camera factory in Dresden by the Allies bombed, Carl Zeiss is divided into two. Moved to Stuttgart, West Germany, is committed to make the Contax rangefinder viewfinder camera is more modern; Zeiss East Germany were arranged in the hometown of the Zeiss Jena, is committed to producing SLR camera is not completed in the past, and introduced marked "Carl Zeiss Jena" series lens. In 1949, the East German Zeiss introduced its first 135 SLR cameras the Contax S, set-top pentaprism, the use of the M42 screw. The launch of the first 135 SLR Contaflex Zeiss West Germany until 1953 using the BM (Bayonet Mount) bayonet (Rollei SL35 series QBM bayonet is carried over from Carl Zeiss 1956 Zeiss acquired a blessing Lenda Voigtlander, and in 1972 Voigtlander sold Rollei). SLR camera in 1961, the East German Zeiss discontinued all models happy and healthy, instead of production Pentacon camera. In 1968, the last of the West German Zeiss SLR Contarex SE. Production by the East German Zeiss Contax cameras with M42 screw, produced by the West German Zeiss Contax cameras, both M42 screw port, BM bayonet. With the rise of the Japanese SLR camera in the late 1950s, the German domestic production of Contax cameras due to the high cost of the competition at a disadvantage. In 1972, the West German Zeiss announced to stop production of Contax cameras, and actively seek cooperation with the Japanese camera manufacturers. In 1973, Carl Zeiss Contax brand production to resume cooperation with the Yashica (Yashica), the Yashica responsible for the production of body, Carl Zeiss concentrate on the design and manufacture of the lens, industrial modeling to Germany Porsche (Porsche) Group. Crystallization of cooperation in 1974 show at Photokina, that is, the Contax RTS, the RTS on behalf of "real-time system (the Real Time System). C / Y bayonet (or Y / C, Bayonet), the use of the bayonet Carl Zeiss lens production spans 30 years, a very large lens group. C / Y mount Zeiss lenses in the eyes of the photographers, AEG, AEJ, MMG and MMJ points: AE is able to achieve the type of lens aperture priority and manual exposure settings, made in Germany known as AEG (G refers to Germany), made in Japan called the AEJ (J to refer to Japan); MM is short for Multi Mode, said that the type of lens, shutter priority and program exposure called MMG, made in Germany, in Japan known as the MMJ. Germany and Japan with Carl Zeiss optics imaging does not make much difference, but the psychological impact of its photographers was very obvious. -------------- [C / Y bayonet] In July 2000, the parent company of Japan's Kyocera (Yashica, 1983 Kyocera acquisition Yashica) has launched a new 135-SLR cameras the Contax N1, which is an AF SLR, the new N bayonet, which also means that the original C / Y mount lens can not be used in this AF SLR camera. Canon, Minolta, from MF to AF in the development process, Kangtaikesi final choice ton output capacity, abandoned the original bayonet. The mouth of the inner diameter of the N card to 55mm, even better than Canon's EF mount also large 1mm. However, Kangtaikesi changed too late for AF SLR camera market has long been among themselves. 2002 Kangtaikesi also released a full frame digital SLR cameras, the Contax N the Digital expensive, so the market reaction is very general. -------------- [Bayonet] April 12, 2005, is a sad day for fans of Contax brand, Japan's Kyocera Corporation announced a freeze on the production of the Contax brand cameras. Following the 1972 Kangtaikesi once again out of the camera made the historical stage. ==================== [It] In addition to the above the camera card estuary, Leica R bayonet, the Sigma SA mount, Konica AR bayonet fujiki FX card port and so on. Mount because of patent reasons and makes interoperability between the major brands of SLR camera lens can not be, but we have to admit that the significance of evolution from the bayonet screw exported. The history of the development of the bayonet is also 135 the history of the development of the SLR camera. ============================
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