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Through-the-lens Metering
In photography, through-the-lens metering (TTL metering) refers to a feature of cameras whereby the intensity of light reflected from the scene is measured through the lens; as opposed to using a separate metering window or external hand-held light meter. In some cameras various TTL metering modes can be selected. This information can then be used to set the optimal film or image sensor exposure ( average luminance), it can also be used to control the amount of light emitted by a flash unit connected to the camera. Description Through-the-lens metering is most often associated with single-lens reflex (SLR) cameras. In most film and digital SLRs, the light sensor(s) for exposure metering are incorporated into the pentaprism or pentamirror, the mechanism by which a SLR allows the viewfinder to see directly through the lens. As the mirror is flipped up, no light can reach there during exposure, the necessary amount of exposure needs to be determined before the actual exposure. Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photography
Photography is the visual arts, art, application, and practice of creating images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film. It is employed in many fields of science, manufacturing (e.g., photolithography), and business, as well as its more direct uses for art, film and video production, recreational purposes, hobby, and mass communication. A person who operates a camera to capture or take Photograph, photographs is called a photographer, while the captured image, also known as a photograph, is the result produced by the camera. Typically, a lens is used to focus (optics), focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed Exposure (photography), exposure. With an electronic image sensor, this produces an Charge-coupled device, electrical charge at each pixel, which is Image processing, electro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zenit (camera)
Zenit () is a Soviet Union, Soviet camera brand manufactured by Krasnogorskiy Zavod, KMZ in the town of Krasnogorsk, Moscow Oblast, Krasnogorsk near Moscow since 1952 and by BELOMO, BelOMO in Belarus since the 1970s. The Zenit trademark is associated with 35 mm format, 35 mm Single-lens reflex camera, SLR cameras. Among related brands are Zorki (Watchful) for 35 mm rangefinder cameras, Moskva (Moscow) and Iskra (Spark) for Medium format (film), medium-format folding cameras and Horizon (camera), Horizon for panoramic cameras. In the 1960s and 1970s, they were exported by Mashpriborintorg to 74 countries. The name is sometimes spelled Zenith in English, such as the manuals published by the United Kingdom, UK Zenit-importer Technical & Optical Equipment (London) Ltd., TOE. However, TOE's imported camera bodies as from 1963 retained the "Zenit" badges. The early Zorki-based models before that time were labelled "Zenith" in a handwritten style of script. History Early yea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Point-and-shoot Camera
A point-and-shoot camera, also known as a compact camera and sometimes abbreviated to P&S, is a still camera (either film or digital) designed primarily for simple operation. Most use focus free lenses or autofocus for focusing, automatic systems for setting the exposure options, and have flash units built in. They are popular for vernacular photography by people who do not consider themselves photographers but want easy-to-use cameras for snapshots of vacations, parties, reunions and other events. Most compact digital cameras use small 1/2.3-type (“1/2.3-inch”) image sensors, but since 2008, a few non-interchangeable lens compact cameras use a larger sensor such as 1.0-type (“1-inch”), APS-C (e.g. Fujifilm X100 series), or even full frame (e.g. Sony RX1 series). Most models prioritize being operated in auto mode, but some high end point-and-shoot cameras have PASM (program, aperture priority, shutter priority, and manual modes) on the mode dial, raw image format ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony SLT Camera
Single-lens translucent (SLT) is a Sony proprietary designation for Sony Alpha cameras which employ a pellicle mirror, electronic viewfinder, and Autofocus#Phase detection, phase-detection autofocus system. They employ the same Minolta A-mount as Sony Alpha DSLR cameras. Sony SLT cameras have a semi-transparent fixed mirror which diverts a portion of incoming light to a sensor, while the remaining light strikes a motherboard. The image sensor feeds the electronic viewfinder and also records still images and video on command. The utility of the SLT design is to allow full-time phase-detection autofocus during electronic viewfinder, live view, and video recording operation. With the advent of digital image sensors with integrated phase-detection, the SLT design is no longer required to accomplish this goal, as evidenced by cameras such as the Sony NEX-5R, Fujifilm X-100s, and Nikon 1, although the SLT design avoids having pixels unavailable for image formation due to their space on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony
is a Japanese multinational conglomerate (company), conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (imaging and sensing), Sony Entertainment (including Sony Pictures and Sony Music Group), Sony Interactive Entertainment (video games), Sony Financial Group, and others. Sony was founded in 1946 as by Masaru Ibuka and Akio Morita. In 1958, the company adopted the name Initially an electronics firm, it gained early recognition for products such as the TR-55 transistor radio and the CV-2000 home video tape recorder, contributing significantly to Japan's Japanese economic miracle, post-war economic recovery. After Ibuka's retirement in the 1970s, Morita served as chairman until 1994, overseeing Sony's rise as a global brand recognized for innovation in consumer electronics. Landmark products included the Trinitron color television, the Walkma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minolta 9000
The Minolta 9000 AF is a professional Single-lens reflex autofocus camera, introduced by Minolta in August 1985.Durniak, 25 August 1985 It was both Minolta's and the world's first professional autofocus SLR. It was called Minolta Maxxum 9000 in the US and Minolta α-9000 in Japan. As the first professional autofocus SLR system ever made, the Minolta 9000 AF sports a number of unique features showing the transition from electro-mechanical cameras to the next generation of fully electronic cameras. History In the early 1980s, Minolta was developing several ranges of autofocus SLR cameras, with the Minolta 7000 aimed at the advanced amateur market, and the Minolta 9000 aimed at the professional market. Development on the Minolta 9000 was completed before that of the Minolta 7000, but for marketing purposes, the 9000 was held back and the 7000 was launched first in February 1985. For this reason, the 7000 is often considered to be the first ever autofocus-capable SLRNotwithstandin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canon Pellix
The Canon Pellix is a manual-focus single-lens reflex (SLR) camera released in 1965 that uses a stationary half-silvered mirror behind which a metering cell is raised during light level metering. The First Canon with TTL Canon suddenly switched from professionally oriented SLR cameras to advanced amateur cameras in March 1964, when they left the Canon Canonflex range and launched the Canon FX with the FL lens mount. It has a built in CdS exposure meter with a circular window on the right-hand camera front. The Canon FP without exposure meter was added later the same year. The cameras were well built, but the metering technology was several years behind the Minolta SR-7, which had pioneered that technology in 1962. Then, just half a year later in the spring of 1965, Canon surprised the camera community with the remarkable Pellix. The new camera featured the much-expected TTL exposure metering facility, albeit employing the stop-down metering method. However, what makes the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pellicle Mirror
A pellicle mirror is an ultra-thin, ultra-lightweight Transparency (optics), semi-transparent mirror employed in the light path of an optical instrument, splitting the light beam into two separate beams, both of reduced light intensity. Splitting the beam allows its use for multiple purposes simultaneously. The thinness of the mirror practically eliminates beam or image doubling due to a non-coincident weak second reflection from the nominally non-reflecting surface, a problem with mirror-type beam splitters. The name ''pellicle'' is a diminutive of ''pellis'', a skin or film. In photography In photography, the pellicle mirror has been employed in SLR camera, single-lens reflex (SLR) cameras, at first to enable through-the-lens exposure measurement and possibly to reduce camera shake, but later most successfully to enable fast series photography, which otherwise would be slowed down by the movement of the reflex mirror, while maintaining constant finder vision. The first use of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax LX
The Pentax LX is a 135 film, 35mm single-lens reflex camera produced by Pentax in Japan. It was introduced in 1980 to commemorate the 60th anniversary of Asahi Optical Co. (hence the Roman numerals LX), and was produced until 2001. It is the top-of-the-line professional, or "system", camera in the Pentax manual focus range, with manual and aperture priority automatic exposure modes and an advanced light metering system. The LX uses the Pentax K mount, K mount, which is the Pentax proprietary bayonet lens mount, and has a large body of accessories. The camera has several unique or uncommon features, and compared with contemporary professional camera bodies from rival manufacturers, like the Canon New F-1 or Nikon F3, the LX body is smaller and lighter, weighing in at with its standard FA-1 finder. Due to the peculiar font used for the Pentax LX logo, the model is sometimes misspelled as 'ILX'. Construction and features The LX is constructed of a solid metal alloy cast frame an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olympus OM-2
The Olympus OM-2 is a professional single-lens reflex (SLR) film system camera manufactured by Olympus Optical Co., Ltd., later Olympus Corporation, in Japan between 1975 and 1988. Main features The Olympus OM-2 is an aperture-priority automatic-exposure camera (with full manual operation selected via switch), based on the earlier, successful Olympus OM-1 body. The OM-2 was introduced in 1975, and combined the light, sturdy camera body style of the manual-only OM-1 with a new automatic exposure system. One of the main selling points of the OM-2 was that all the OM-1 accessories and lenses would fit without modification, offering a compact system and an easy upgrade path for OM-1 owners. A number of famous photographers used the OM-2, including Patrick Lichfield, Kon Sasaki, Roy Morsch, Jacques Schumacher, Robert Semeniuk, and James Sugar. Technical details Of the many features the OM-2 boasted, the most commonly advertised feature was that it was the first camera to offer a t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olympus OM-3
The Olympus OM-3 is a professional single-lens reflex (SLR) film system camera, part of the Olympus OM system. It was manufactured by Olympus Optical Co., Ltd., later Olympus Corporation, in Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ... between 1983 and 2002. History The Olympus OM-3 is a manual camera without automatic exposure modes, and an entirely mechanical shutter. Introduced in 1983, the OM-3 was the first of a new series of professional camera bodies designed to update the OM-1 and OM-2. These new bodies, which continued with the more popular OM-4, included a number of refinements over their predecessors. The most significant changes made were to the metering system. The OM-3 and OM-4 featured multi-spot metering in addition to the centre-weighted metering ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
