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The Contaflex series is a family of 35mm Single-lens reflex cameras (SLR) equipped with a leaf shutter, produced by Zeiss Ikon in the 1950s and 1960s. The name was first used by Zeiss Ikon in 1935 for a 35mm Twin-lens reflex camera, the Contaflex TLR; for the earlier TLR, the -flex suffix referred to the integral reflex mirror for the viewfinder.
Icarex is a line of 35mm single lens reflex cameras (SLRs) made by Zeiss Ikon, derived from an earlier Bessaflex project developed by Voigtländer.The Icarex line, which included the Icarex 35, Icarex 35CS, Icarex 35S, and SL 706, was aimed at a mid-range market above the Contaflex SLR, which was intended for advanced amateurs, but below the Contarex line for professionals.
Johnson Matthey Technology Review, known as Platinum Metals Review before 2014, is a quarterly, open access, peer-reviewed scientific journal publishing reports on scientific research on the platinum group metals and related industrial developments. [1]
Contarex I, showing aperture selected in the "Bullseye/Cyclops" window. The Contarex I, aka Bullseye (catalog 10.2401), was built between 1959 and 1966. [14] It was the first 35mm SLR camera with a focal plane shutter that provides direct light meter coupling to the shutter-, aperture-, and film speed-settings; they are interconnected by cords.
In 1930, Ernst Wandersleb and Willy Merté from Zeiss developed Tessar lenses with apertures of f /3.5 and f /2.8. [6]: 87 [7] In 1925, E. Wandersleb and W. Merté of Zeiss created the Biotessar consisting of two elements cemented in the front, a single negative element in the center, and three cemented in the rear. [8]
The first Zeiss Sonnar, patented in 1929, was a f /2.0 50 mm lens with six elements in three groups and released with the Zeiss Contax I rangefinder camera in 1932. In 1931, Bertele reformulated the Sonnar with seven elements in three groups, allowing a maximum aperture of f /1.5 .
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The Tenax I is a 24x24 mm fixed lens camera by Zeiss Ikon launched in 1939.. The Tenax I was actually launched after the Tenax II.Like the Tenax II, it is a 24×24mm square-format camera taking over 50 exposures on a standard 135 film (35 mm), with a rapid-advance lever next to the lens.