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Autofocus
An autofocus (AF) optical system uses a sensor, a control system and a motor to focus on an automatically or manually selected point or area. An electronic rangefinder has a display instead of the motor; the adjustment of the optical system has to be done manually until indication. Autofocus methods are distinguished as active, passive or hybrid types. Autofocus systems rely on one or more sensors to determine correct focus. Some AF systems rely on a single sensor, while others use an array of sensors. Most modern SLR cameras use through-the-lens optical sensors, with a separate sensor array providing light metering, although the latter can be programmed to prioritize its metering to the same area as one or more of the AF sensors. Through-the-lens optical autofocusing is usually speedier and more precise than manual focus with an ordinary viewfinder, although more precise manual focus can be achieved with special accessories such as focusing magnifiers. Autofocus accur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AI Servo
An autofocus (AF) optical system uses a sensor, a control system and a Electric motor, motor to Focus (optics), focus on an automatically or manually selected point or area. An Rangefinder camera#Digital rangefinder, electronic rangefinder has a display instead of the motor; the adjustment of the optical system has to be done manually until indication. Autofocus methods are distinguished as Passivity (engineering), active, Passivity (engineering), passive or hybrid types. Autofocus systems rely on one or more sensor, sensors to determine correct focus. Some AF systems rely on a single sensor, while others use an array of sensors. Most modern SLR cameras use Through-the-lens metering, through-the-lens optical sensors, with a separate sensor array providing light Metering mode, metering, although the latter can be programmed to prioritize its metering to the same area as one or more of the AF sensors. Through-the-lens optical autofocusing is usually speedier and more precise than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax ME F
The Pentax ME F was an amateur level, interchangeable lens, 135 film, 35 mm film, single-lens reflex camera, single-lens reflex (SLR) camera. It was manufactured by Pentax, Asahi Optical Co., Ltd. of Japan from November 1981 to 1984. The ME F was a heavily modified version of the Pentax ME-Super, and a member of the Pentax M-series family of SLRs (see List of Pentax products). It was the first mass-produced SLR camera to come with an autofocus system. Significance and market position The ME F is a historically significant camera. It was the first autofocus (AF) 35 mm SLR camera to reach production. It had a built-in through-the-lens (TTL) electronic contrast detection system to automatically determine proper subject focus and drive a lens to that focus point. Although it autofocused poorly and was a commercial failure, the pioneering ME F was a major milestone in the history of camera technology that pointed the way to all present day AF SLRs. Most new cameras today, whether f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canon FD Lens Mount
The Canon FD lens mount is a physical standard for connecting a photographic lens to a 35mm single-lens reflex camera body. The standard was developed by Canon (company), Canon of Japan and was introduced in March 1971 with the Canon F-1 camera. It served as the Canon SLR interchangeable lens mounting system until the 1987 introduction of the Canon EOS series cameras, which use the newer Canon EF lens mount, EF lens mount. The FD mount lingered through the release of the 1990 Canon T60, the last camera introduced in the FD system, and the end of the Canon New F-1 product cycle in 1992. Overview The FD mount is mechanically compatible with and replaced Canon's earlier Canon FL, FL mount,which in turn had replaced the Canon R lens mount, R mount; FD-mount cameras can use FL lenses in Stopping down, stop-down metering mode and R lenses will mount, but must be used with manual aperture and stop-down metering. Though never officially explained by Canon, others have attempted to assi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minolta 7000
The Minolta MAXXUM 7000 (7000 AF in Europe and α-7000 in Japan) 35 mm SLR camera was introduced in February 1985. It was the first camera to feature both integrated autofocus (AF) and motorised film advance, the standard configuration for later amateur and professional single lens reflex cameras. Overview Although the Nikon F3AF (1983), Pentax ME F and Chinon CE-5 already had presented autofocus single lens reflex cameras, autofocusing could not be achieved without the use of special motorised AF lenses. The Pentax ME F had focus sensors in the camera body, while the Chinon CE-5 used a lens with built-in active infrared sensors. Nikon already had a camera with integrated motor drive on the market, the N2000 ( F-301 in UK), but its autofocus counterpart, the N2020 ( F-501 in UK), appeared after the Maxxum/Dynax. The Minolta 7000 had its AF sensors and the focusing drive inside the camera body, and as a result the lenses could be much smaller and cheaper. The aperture and focu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Konica C35 AF
The Konica C35 AF, released in November 1977, was the first mass production, mass-produced autofocus camera. Features This was an autofocus version of the Konica C35 Automatic camera. It featured a fixed-aperture Hexanon 38 mm f/2.8 autofocus photographic lens, lens with a leaf shutter, a built-in electronic flash, and an automatic exposure system to select the appropriate shutter speed. The film advance was mechanical. The Shutter (photography), shutter was electronically controlled with three speeds, 1/60, 1/125, and 1/250. The exposure system could handle Film_speed , film speeds from ISO 25 to ISO 400 and the built in flash had a guide number of 14 at ISO 100 covering distances from 1.1m to 5m. This camera was the first mass-produced camera with built in autofocus and used a system with an electronic version of a Coincidence_rangefinder , split-image rangefinder. External links Konica C35 Automaticby Luis Triguez * Konica C35 AF User's Manual Reference ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikon F3
The Nikon F3 is Nikon (, ; ) is a Japanese optics and photographic equipment manufacturer. Nikon's products include cameras, camera lenses, binoculars, microscopes, ophthalmic lenses, measurement instruments, rifle scopes, spotting scopes, and equipment related to S ...'s third professional single-lens reflex camera body, preceded by the F and F2. Introduced in March 1980, it has manual and semi-automatic exposure control whereby the camera would select the correct shutter speed (aperture priority automation). The Nikon F3 series cameras has the most model variations of any Nikon F camera. It is also the first of numerous Nikon F-series cameras to be styled by Italian designer Giorgetto Giugiaro, and to include a red stripe on the handgrip – a feature that would later become (with variants of stripes and various other shapes) a signature feature of many Nikon cameras. The F2AS was a current model when the F3 was introduced, and for a while both were sold concurrently. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rangefinder Camera
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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikon
(, ; ) is a Japanese optics and photographic equipment manufacturer. Nikon's products include cameras, camera lenses, binoculars, microscopes, ophthalmic lenses, measurement instruments, rifle scopes, spotting scopes, and equipment related to Semiconductor device fabrication, semiconductor fabrication, such as Stepper, steppers used in the photolithography steps of such manufacturing. Nikon is the world's second largest manufacturer of such equipment. Since July 2024, Nikon has been headquartered in Nishi-Ōi, Shinagawa, Shinagawa, Tokyo where the plant has been located since 1918. The company is the eighth-largest chip equipment maker as reported in 2017. Also, it has diversified into new areas like 3D printers, 3D printing and regenerative medicine to compensate for the shrinking digital camera market. Among Nikon's many notable product lines are Nikkor imaging lenses (for Nikon F-mount, F-mount cameras, large format photography, photographic enlargers, and other applicatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-lens Reflex Camera
In photography, a single-lens reflex camera (SLR) is a type of camera that uses a mirror and prism system to allow photographers to view through the lens and see exactly what will be captured. SLRs became the dominant design for professional and consumer-level cameras throughout the late 20th century, offering interchangeable lenses, through-the-lens (TTL) metering, and precise framing. Originating in the 1930s and popularized in the 1960s and 70s, SLR technology played a crucial role in the evolution of modern photography. Although digital single-lens reflex (DSLR) cameras succeeded film-based models, the rise of Mirrorless camera, mirrorless cameras in the 2010s has led to a decline in SLR use and production. 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 and allows light to pass through to the light receptor and the im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polaroid SX-70
The SX-70 is a folding single lens reflex Land camera which was produced by the Polaroid Corporation from 1972 to 1981. The SX-70 helped popularize instant photography. History In 1948, Polaroid introduced its first consumer camera. The Land Camera Model 95 was the first camera to use instant film to quickly produce photographs without developing them in a laboratory. Although popular, the Model 95 and subsequent Land Cameras required complex procedures to take and produce good photographs. The photographic paper for each picture had to be manually removed from the camera and peeled open after 60 seconds to reveal the image which needed to be hand coated with a chemical stabilizer for preservation. The picture required several minutes to dry and the process could leave developing chemicals on the hands. The instructions for the Model 20 Swinger, introduced in 1965, warned that, if not followed, "you're headed for plenty of picture taking trouble". Pictures from the SX ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
