Leidolf was a manufacturer of optical equipment situated in Wetzlar, Germany. [1] [2] It was founded by Rudolf Leidolf in 1921, initially producing lenses for microscopes. [1] [2] In 1948 camera production was started and in 1962 the factory ceased operations. [1] Leidolf is in no way related to Leitz (the manufacturer of Leica), even though Wetzlar has been the historical location for both companies. [1]
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A single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system that permits the photographer to view through the lens and see exactly what will be captured. With twin lens reflex and rangefinder cameras, the viewed image could be significantly different from the final image. When the shutter button is pressed on most SLRs, the mirror flips out of the light path, allowing light to pass through to the light receptor and the image to be captured.
A rangefinder camera is a camera fitted with a rangefinder, typically a split-image rangefinder: a range-finding focusing mechanism allowing the photographer to measure the subject distance and take photographs that are in sharp focus. Most varieties of rangefinder show two images of the same subject, one of which moves when a calibrated wheel is turned; when the two images coincide and fuse into one, the distance can be read off the wheel. Older, non-coupled rangefinder cameras display the focusing distance and require the photographer to transfer the value to the lens focus ring; cameras without built-in rangefinders could have an external rangefinder fitted into the accessory shoe. Earlier cameras of this type had separate viewfinder and rangefinder windows; later the rangefinder was incorporated into the viewfinder. More modern designs have rangefinders coupled to the focusing mechanism so that the lens is focused correctly when the rangefinder images fuse; compare with the focusing screen in non-autofocus SLRs.
Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system. A closely related ISO system is used to describe the relationship between exposure and output image lightness in digital cameras.
Leica Camera AG is a German company that manufactures cameras, optical lenses, photographic lenses, binoculars, rifle scopes and microscopes. The company was founded by Ernst Leitz in 1869, in Wetzlar, Germany.
Wetzlar is a city in the state of Hesse, Germany. It is the twelfth largest city in Hesse with currently 55,371 inhabitants at the beginning of 2019. As an important cultural, industrial and commercial center, the university town is one of the ten regional centers in the state of Hesse. A former free imperial city, it gained much of its fame as the seat of the Imperial Supreme Court (Reichskammergericht) of the Holy Roman Empire. Located 51 kilometers north of Frankfurt, at 8° 30′ E, 50° 34′ N, Wetzlar straddles the river Lahn and is on the German Timber-Frame Road, which passes mile upon mile of half-timbered houses. Historically, the city has acted as the hub of the Lahn-Dill-Kreis on the north edge of the Taunus. Tourists know the city for its ancient town and its medieval Catholic/Protestant shared cathedral of St. Mary. Notable architectural features include the Eisenmarkt and the steep gradients and tightly-packed street layout of a medieval town. The building of the sandstone cathedral commenced in the 12th century in Romanesque style. In the later Middle Ages the construction continued under a master plan in Gothic style. The church was never finished—one steeple still remains uncompleted. The cathedral suffered heavy damage in the Second World War from aerial bombing, but restoration took place in the 1950s. On the outskirts of town along the river stand the ruins of several stone towers.
The Lahn is a 245.6-kilometre-long (152.6 mi), right tributary of the Rhine in Germany. Its course passes through the federal states of North Rhine-Westphalia (23.0 km), Hesse (165.6 km), and Rhineland-Palatinate (57.0 km).
Leica Geosystems based in eastern Switzerland produces products and systems for surveying and geographical measurement (geomatics). Its products employ a variety of technologies including GPS satellite navigation and laser rangefinders to enable users to model existing structures, terrains in computer based systems to high accuracies, often under 1 cm.
Braun GmbH is a German consumer products company founded in 1921 and based in Kronberg im Taunus. The company is particularly well known for its industrial product design from the mid-20th century which included electric shavers and record players.
The Miranda Camera Company, originally named the Orion Camera Company, manufactured cameras in Japan between 1955 and 1978. Their first camera was the Miranda T. Many of their products were single-lens reflex cameras for 135 film (35 mm). Unlike many Japanese made cameras, Miranda did not make their own lenses and had to rely on other manufacturers to supply them.
Maria Gruber, Irene Leidolf, Stephanija Meyer, and Waltraud Wagner were four Austrian women who worked as nurse's aides at the Geriatriezentrum am Wienerwald in Lainz, Vienna, and who murdered scores of patients between 1983 and 1989. The group killed their victims with overdoses of morphine or by forcing water into the lungs. By 2008, all four of the women had been released from prison.
Oskar Barnack was an inventor and German photographer who built, in 1913, what would later become the first commercially successful 35mm still-camera, subsequently called Ur-Leica at Ernst Leitz Optische Werke in Wetzlar.
Leica Microsystems GmbH is a German microscope manufacturing company. It is a manufacturer of optical microscopes, equipment for the preparation of microscopic specimens and related products. There are ten plants in eight countries with distribution partners in over 100 countries. Leica Microsystems emerged in 1997 out of a 1990 merger between Wild-Leitz, headquartered in Heerbrugg Switzerland, and Cambridge Instruments of Cambridge England. The merger of those two umbrella companies created an alliance of the following 8 individual manufacturers of scientific instruments. American Optical Scientific Products, Carl Reichert Optische Werke AG, R.Jung, Bausch and Lomb Optical Scientific Products Division, Cambridge Instruments, E.Leitz Wetzlar, Kern & Co., and Wild Heerbrugg AG, bringing much-needed modernization and a broader degree of expertise to the newly created entity called Leica Holding B.V. group. In 1997 the name was changed to Leica Microsystems and is a wholly-owned entity of Danaher Corporation since July 2005. Danaher is a US venture capital company.
The Leica Standard, Model E was the fourth version of the original 35 mm Leica camera to be launched from Ernst Leitz in Wetzlar, Germany. The concept was conceived by their employee Oskar Barnack in 1913. Production of the camera began in 1925 but it was not until the end of the decade that it was perfected and full-scale production was established.
The Leica copies originate from the Leica camera that was launched by Ernst Leitz, Wetzlar in 1925, using the Leica 39mm screw mount of 26 threads per inch, and the standard 35mm film. The design was carried out by Oskar Barnack, beginning in 1913 by building a camera for 24×36 mm negatives that by now is called the Ur-Leica; but Ernst Leitz did not decide to manufacture it until 1924. Once started, the Leica production volume doubled each year; in 1929, some 16.000 cameras were produced. In 1930, an improved model with interchangeable lens was introduced, followed a year later by the fully developed Leica II with standardized film to lens flange distance, and in 1932 the basic Leica Standard; the Leica concept was established. This camera's features are the basis for defining a Leica copy.
Ernst Leitz GmbH was a German corporation based in Wetzlar, a German centre for optics as well as an important location for the precision engineering industry, now divided into four independent companies:
Rittal is a German company headquartered in Herborn. The company manufactures electrical enclosures for use in industrial settings. Founded in 1961, Rittal is a subsidiary of the Friedhelm Loh Group. The name Rittal is derived from the place where the company was founded – Rittershausen in Dietzhölztal.
Esther Morris Leidolf is a US-based medical sociologist, an intersex activist, writer, the founder of the MRKH Organization, and was the board secretary for the Intersex Society of North America.
Bob Schwalberg was an American photojournalist and writer on photographic technique and equipment.
Ernst Leitz II was a German business person and humanitarian. He was the second head of the optics company now known as Leica Camera and organized the Leica Freedom Train to allow people, most of whom were Jewish, to escape from Germany during Nazi times.