2/27/2023 0 Comments Four thirds system lens wiki![]() ![]() Olympus released the Olympus-Auto electro-set (1958) and Auto-B electro-set (1959) shortly after the Ace interchangeable lens rangefinder, using styling largely borrowed from the Ace. Automated exposure 35mm cameras Autoexposure 35mm fixed-lens camera lenses Lens : 20–21 The 35 S-II was also marketed in the United States by Sears as the Tower 10 (with the 48mm f/2.8) and the Tower 18 (with the 42mm f/1.8). The faster lens was later replaced by a Zuiko 42mm f/2.0. The Olympus 35 S-II replaced the 35 S in 1957 using a body similar to the Wide-S with a choice of two lenses, a faster G.Zuiko 42mm f/1.8 and a slower E.Zuiko 48mm f/2.8 carried over from the 35 S. : 13–16 The Wide-S was also sold by Sears as the Tower 20. Lens speed was increased by almost two stops compared to the Wide and Wide-E with the H.Zuiko-W 35mm f/2.0 fitted to the Wide-S. The first Olympus 35mm rangefinder camera with a wide-angle lens was the Wide-S (or Wide Super) of 1957. : 19 The 35 K was also sold by Sears as the Tower 56. : 11–12 The slowest 35 S with the 40mm f/3.5 lens was replaced by the 35 K in 1957. The initial version of the 35 S used the same 'normal' lens as the preceding viewfinder cameras, now branded D.Zuiko 1:3.5 f=4.0 cm, but Olympus quickly released versions of the same body with faster non-interchangeable lenses, including an E.Zuiko 48mm f/2.8 and a G.Zuiko 45mm f/1.9 (released in 1956). Olympus also began selling the Olympus 35 S rangefinder in 1955, alongside the Olympus 35 Vb viewfinder which had been launched that same year. In 1958, the Wide II viewfinder camera replaced the Wide with no change to the lens. : 14–15 The Wide-E was sold in the United States as the Sears Tower 54. : 13 A version of the Wide using the same lens was produced in 1957 with an integral uncoupled meter, branded the Wide-E. Using a chassis similar to the 35 V, Olympus also released the Olympus Wide in 1955, a viewfinder camera featuring the D.Zuiko-W 35mm f/3.5 wide-angle lens. : 2–10 Starting with the IV series, the lens dropped 'Coated' in favor of 'F.C.' (fully coated), in both cases referring to the anti-reflective coating. It was a viewfinder camera using a 24×32mm frame size fitted with a fixed (non-interchangeable) 'Zuiko Coated' 40mm f/3.5 lens that same lens was also used on the subsequent 35 III (released in 1949 and changed the frame size to the standard 24×36mm), IV (IV in 1949, IVa in 1953, and IVb in 1954), and V (Va and Vb, both in 1955). In 1948, Olympus marketed the first 35mm camera in Japan, the Olympus 35 I. Early 35mm cameras Early 35mm fixed-lens camera lenses Lens The Olympus Flex I was a twin-lens reflex camera first sold in 1952. The Semi-Olympus used a Semi-Proud body, which took pictures in the 6×4.5 frame using medium format film. The first 'Zuiko'-branded lens was a 75mm f/4.5 lens fitted to the Semi-Olympus I of 1936. ' Wide-angle' lenses have focal length significantly shorter than the diagonal dimension, while ' Telephoto' lenses have focal length significantly greater than the diagonal dimension.įixed-lens cameras Medium format cameras The use of 'standard' refers to the focal length compared to the diagonal dimension of the imager in this case 50mm is approximately the diagonal dimension of the 35mm film frame. ^ Provides the number of optical elements in the lens' design.įor example, an "Olympus OM-SYSTEM G.Zuiko Auto-S 1:1.4 f=50mm" is a lens with a ' Standard' focal length and a maximum aperture of f/1.4 featuring a seven-element construction and an automatic diaphragm, built for the OM-system.^ Applied to single-coated prime lenses only.Reviews of the E-M10 Mark IV were generally positive, though the camera took some criticism for having a plastic build that differed from the previous iterations that were of metal construction. 5-axis in-body image stabilization (up to 4.5 stops).20 Megapixel Live MOS sensor (Four Thirds).It continues the Olympus model of including image stabilization in-body. It is the first OM-D camera to feature a flip-down LCD monitor, and the first E-M10 model to include a 20 Megapixel live MOS sensor. ![]() The camera utilizes the micro four-thirds system and was announced on August 4, 2020, and launched on September 18 of the same year. The Olympus OM-D E-M10 Mark IV is the fourth iteration of the entry-level model in the OM-D series of mirrorless interchangeable-lens cameras produced by Olympus (since 2021 OM Digital Solutions). ![]()
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