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Rolleiflex 6000 System
The Rolleiflex 6000 System is a line of medium format single lens reflex cameras made by Rollei, in regular production starting from 1983 with the 6006. The 6006 was derived from the earlier SLX (1976) and retains compatibility with its lenses and accessories, adding an interchangeable film back with an integral dark slide. Like the SLX, the 6000 series cameras incorporate electronic autoexposure and motorized film transport, competing directly with the line of similar integrated-motor Hasselblad V-system cameras which started with the 500EL. The 6006 was followed by the 6002 (1986), 6008 (1988), 6003 (1996), 6001 (1998), and 6008 AF (2002). The 6002 may be regarded as a simplified version of the 6006, or alternatively as a replacement for the SLX, with a non-interchangeable back; the 6008/6003 are positioned similarly. Rollei released numerous sub-variants of each model. History Broadly, the 6000 System can be divided into two distinct generations: the 6006/6002, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Zeiss AG
Zeiss ( ; ) is a German manufacturer of optical systems and optoelectronics, founded in Jena, Germany, in 1846 by optician Carl Zeiss. Together with Ernst Abbe (joined 1866) and Otto Schott (joined 1884) he laid the foundation for today's multinational company. The current company emerged from a reunification of Carl Zeiss companies in East and West Germany with a consolidation phase in the 1990s. ZEISS is active in four business segments with approximately equal revenue (Industrial Quality and Research, Medical Technology, Consumer Markets and Semiconductor Manufacturing Technology) in almost 50 countries, has 30 production sites and around 25 development sites worldwide. Carl Zeiss AG is the holding of all subsidiaries within Zeiss Group, of which Carl Zeiss Meditec AG is the only one that is traded at the stock market. Carl Zeiss AG is owned by the foundation Carl-Zeiss-Stiftung. The Zeiss Group has its headquarters in southern Germany, in the small town of Oberkochen, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jenoptik
Jenoptik AG is a Jena, Germany-based integrated photonics company. The company is listed on the Frankfurt Stock Exchange and is included in the TecDAX stock index. History The group can trace its heritage back to the original Carl Zeiss AG company, founded in Jena in 1846. In 1846 Zeiss opened his optical workshop in Jena. After Carl Zeiss's death, Ernst Abbe, who had joined the workshop, became the sole owner and established the Carl Zeiss Foundation Jena, which subsequently owned the Carl Zeiss company and the Schott glassworks. In 1948, the Zeiss factory and the Schott glassworks were nationalised. Following World War II, Jena fell within the Soviet occupation zone, later to become East Germany. In 1948, when it was apparent that the Soviet authorities were moving toward establishing a separate Communist state in their occupation territory, most of the main Zeiss company swiftly relocated to West Germany. The Soviet and East German authorities took over the old Zeiss fact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresnel Lens
A Fresnel lens ( ; ; or ) is a type of composite compact lens (optics), lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections. The simpler Dioptrics, dioptric (purely refraction, refractive) form of the lens was first proposed by Georges-Louis Leclerc, Comte de Buffon, and independently reinvented by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. The Catadioptric system, catadioptric (combining refraction and reflection) form of the lens, entirely invented by Fresnel, has outer Prism (optics), prismatic elements that use total internal reflection as well as refraction to capture more oblique light from the light source and add it to the beam, making it visible at greater distances. The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Glass
Ground glass is glass whose surface has been ground to produce a flat but rough ( matte) finish, in which the glass is in small sharp fragments. Ground glass surfaces have many applications, ranging from ornamentation on windows and table glassware to scientific uses in optics and laboratory glassware. Uses Photography In photography, a sheet of ground glass is used for the manual focusing in some still and movie cameras; the ground-glass viewer is inserted in the back of the camera, and the lens opened to its widest aperture. This projects the scene on the ground glass upside down. The photographer focuses and composes using this projected image, sometimes with the aid of a magnifying glass (or loupe). In order to see the image better, a dark cloth is used to block out light, whence came the image of the old-time photographer with his head stuck under a large black cloth. A ground glass is also used in the reflex finder of an SLR or TLR camera. In motion-picture cameras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voice Coil Motor
A voice coil (consisting of a former, collar, and winding) is the coil of wire attached to the apex of a loudspeaker cone. It provides the motive force to the cone by the reaction of a magnetic field to the current passing through it. The term is also used for voice coil linear motors such as those used to move the heads inside hard disk drives, which produce a larger force and move a longer distance but work on the same principle. In some applications, such as the operation of servo valves, electronic focus adjustment on digital cameras, these are known as voice coil motors (VCM). Operation By driving a current through the voice coil, a magnetic field is produced. This magnetic field causes the voice coil to react to the magnetic field from a permanent magnet fixed to the speaker's frame, thereby moving the cone of the speaker. By applying an audio waveform to the voice coil, the cone will reproduce the sound pressure waves, corresponding to the original input signal. D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaf Shutter
In photography, a shutter is a device that allows light to pass for a determined period, exposing photographic film or a photosensitive digital sensor to light in order to capture a permanent image of a scene. A shutter can also be used to allow pulses of light to pass outwards, as seen in a movie projector or a signal lamp. A shutter of variable speed is used to control exposure time of the film. The shutter is constructed so that it automatically closes after a certain required time interval. The speed of the shutter is controlled either automatically by the camera based on the overall settings of the camera, manually through digital settings, or manually by a ring outside the camera on which various timings are marked. Camera shutter Camera shutters can be fitted in several positions: * Leaf shutters are usually fitted within a lens assembly (''central shutter''), or more rarely immediately behind (''behind-the-lens shutter'') or, even more rarely, in front of a lens, and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bellows (photography)
In photography, a bellows is the accordion-like, pleated expandable part of a camera, usually a large or medium format camera, to allow the lens to be moved with respect to the focal plane for focusing. Bellows are also used on enlargers. The bellows provides a flexible, dark extension between the film plane and the lens. Classification Two kinds of bellows are commonly used on cameras; bag bellows are normally used with a lens of short focal length, and accordion bellows with a much longer range of extension. For large format cameras, “double extension” refers to bellows that extend to a length equal to about twice the focal length of a standard lens, e.g. 300 mm for the 4×5 inch format. “Triple extension” for the same format indicates bellows extension of 450 to 500 mm. Flexibility Bellows allow movements that can be used to correct distortion in a photograph and to avoid converging or diverging verticals. Use of a bellows-based camera can ensure that paralle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCSI
Small Computer System Interface (SCSI, ) is a set of standards for physically connecting and transferring data between computers and peripheral devices, best known for its use with storage devices such as hard disk drives. SCSI was introduced in the 1980s and has seen widespread use on servers and high-end workstations, with new SCSI standards being published as recently as SAS-4 in 2017. The SCSI standards define commands, protocols, electrical, optical and logical interfaces. The SCSI standard defines command sets for specific peripheral device types; the presence of "unknown" as one of these types means that in theory it can be used as an interface to almost any device, but the standard is highly pragmatic and addressed toward commercial requirements. The initial Parallel SCSI was most commonly used for hard disk drives and tape drives, but it can connect a wide range of other devices, including scanners and optical disc drives, although not all controllers can handle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
STS-41 Pilot Cabana Points ROLLEI Camera Out Aft Flight Deck Overhead Window
STS-41 was the 36th Space Shuttle mission and the eleventh mission of the Space Shuttle ''Discovery''. The four-day mission had a primary objective of launching the ''Ulysses'' probe as part of the " International Solar Polar Mission" (ISPM). Crew Crew seat assignments Mission highlights ''Discovery'' lifted off on October61990 at 7:47:16a.m. EDT. Liftoff occurred 12minutes after a two-and-a-half-hour launch window opened that day at 7:35a.m. EDT. STS-41 featured the heaviest payload to date; ''Discovery'' weighed . The primary payload was the European Space Agency (ESA)-built ''Ulysses'' spacecraft to explore the polar regions of Sun. Attached to ''Ulysses'' were two upper stages, the Inertial Upper Stage (IUS) and a mission-specific Payload Assist Module-S (PAM-S), combined for the first time to send ''Ulysses'' toward an out-of-ecliptic trajectory. Other payloads and experiments included the Shuttle Solar Backscatter Ultraviolet (SSBUV) experiment, Intelsat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial Units
The imperial system of units, imperial system or imperial units (also known as British Imperial or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments. The imperial system developed from earlier English units as did the Comparison of the imperial and US customary measurement systems, related but differing system of United States customary units, customary units of the United States. The imperial units replaced the Winchester measure, Winchester Standards, which were in effect from 1588 to 1825. The system came into official use across the British Empire in 1826. By the late 20th century, most nations of the former empire had metrication, officially adopted the metric system as their main system of measurement, but imperial units are still used alongside metric units in the United Kingdom and in some other parts of the former empi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
120 Film
120 is a film format for still photography introduced by Kodak for their '' Brownie No. 2'' in 1901. It was originally intended for amateur photography but was later superseded in this role by 135 film. 120 film survives to this day as the only medium format film that is readily available to both professionals and amateur enthusiasts. Characteristics The 120 film format is a roll film which is nominally between 60.7 mm and 61.7 mm wide. Most modern films made today are roughly 61 mm (2.4 inches) wide. The film is held in an open spool originally made of wood with metal flanges, later with all-metal, and finally with all-plastic. The length of the film is nominally between and , according to the ISO 732:2000 standard. However, some films may be as short as . The film is attached to a piece of backing paper longer and slightly wider than the film. The backing paper protects the film while it is wound on the spool, with enough extra length to allow loading a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolleiflex SL66
The Rolleiflex SL66 is a line of medium format single lens reflex cameras made by Rollei, in regular production starting from 1966 until Rollei's bankruptcy in 1982. The SL66 represented a change in direction for Rollei, which until that time had focused almost exclusively on its popular twin lens reflex cameras, the Rolleiflex and Rolleicord. The Rolleiflex SLX, which was introduced in 1973, effectively replaced the SL66, although the older camera continued in production. After reorganization, Rollei resumed production of the SL66 and introduced the SL66E; variants of the SL66 were introduced and produced until the line was discontinued in 1992. History In 1957, a gentlemen's agreement between Reinhold Heidecke, inventor of the Rolleiflex TLR, and Victor Hasselblad, inventor of the Hasselblad SLR, was reached to ensure that Rollei would not manufacture Single-lens reflex camera, SLR cameras, and Hasselblad would not manufacture Twin-lens reflex camera, TLR cameras. However, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
