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K-mount
The Pentax K-mount, sometimes referred to as the "PK-mount", is a bayonet lens mount standard for mounting interchangeable photographic lenses to 35 mm single-lens reflex (SLR) cameras. It was created by Pentax in 1975, and has since been used by all Pentax 35 mm and digital SLRs and also the MILC Pentax K-01. A number of other manufacturers have also produced many K-mount lenses and K-mount cameras. Mounts The Pentax K-mount has undergone a number of evolutions over the years as new functionality has been added. In general, the term K-mount may refer to the original K-mount, or to all its variations. Originally designed by Zeiss for an alliance with Pentax, it was intended to be a common lens mount for a proposed series of cameras and lenses. However, the plan failed to work out and the two firms parted company amicably, but Pentax retained the lens mount and at least one Zeiss lens design for its own use. K-mount The original K-mount is a simple bayonet conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax K10D
The Pentax K10D and similar Samsung GX-10 are 10.2-megapixel digital single-lens reflex cameras launched in late 2006. They were developed in a collaboration between Pentax of Japan and Samsung of South Korea. The K10D was announced on 13 September 2006, and released in mid-November 2006, while Samsung announced the GX-10 on 2006-09-21 and it became available on January 1, 2007. The Pentax K20D, successor to the K10D, was officially announced on January 23, 2008. The K10D has been hailed by ''Popular Photography and Imaging'' magazine as "an all-star player," and was named as a finalist for their 2007 "Camera of the Year" award. Technology and construction It combines a 10.2 effective megapixel CCD sensor, coupled with a 22-bit analog-to-digital converter (ADC) and a shake reduction system which also provides a dust removal feature to keep dust off the sensor surface. The K10D features a new image processor called ''PRIME'' (Pentax Real IMage Engine), which interfaces with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax K-01
Pentax K-01 is a mirrorless interchangeable-lens camera announced in February 2012. It uses the Pentax K mount. The camera was listed as discontinued in February 2013, but the following July was reintroduced to the Japanese market in a new white and blue colour variant. Lens compatibility The Pentax K-01 is the first interchangeable single-lens mirrorless camera which is compatible with lenses from a typical SLR camera without the use of an adapter. This differs from cameras from other manufacturers such as Nikon's Nikon 1 or Pentax's own Pentax Q, where the manufacturers designed a new lens mount specifically for the new camera system. The camera is compatible with all K mount lenses; K mount lenses started being made in 1975. Lenses without the "A" aperture setting will only meter properly using stop-down metering. Manual focus lenses will continue to function as manual-focus only. Image quality The K-01 features the same sensor as the Pentax K-5 and Nikon D7000 DSLRs, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax K1000
The Pentax K1000 (originally marked the Asahi Pentax K1000) is an interchangeable lens, 35 mm film, single-lens reflex (SLR) camera, manufactured by Asahi Optical Co., Ltd. from 1976 to 1997, originally in Japan. The K1000's extraordinary longevity makes it a historically significant camera. The K1000's inexpensive simplicity was a great virtue and earned it an unrivaled popularity as a basic but sturdy workhorse. The Pentax K1000 eventually sold over three million units. Description The K1000, introduced in 1976, is the simplest member of Asahi Optical's Pentax K-series 35mm SLRs. The other members are the Pentax K2, KM, and KX, introduced in 1975, and the K2 DMD of 1976. All have the same basic body design, but with differing feature levels, electronics, and controls. The K1000 was the KM with the self-timer, depth of field pre-view and some other features removed to save cost. It uses a horizontal travel, rubberized silk cloth focal plane shutter with a speed range of 1/1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax ME F
The Pentax ME F was an amateur level, interchangeable lens, 35 mm film, single-lens reflex (SLR) camera. It was manufactured by 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 film, video or digital, have some sort of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax LX
The Pentax LX is a 135 film, 35 mm single-lens reflex camera produced by Pentax in Japan. It was introduced in 1980 and produced until 2001. The LX uses the Pentax K mount, K mount which is the Pentax proprietary bayonet lens mount. It has manual and aperture priority automatic exposure modes. It is the top-of-the-line "professional" or "system" camera in the Pentax manual focus range, and has a large range of accessories. 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 570 grams (20 ounces) with 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 Construction is strong and durable, with a solid cast metal frame and metal covering plates. All buttons and dials are weather and dust sealed, a unique feature not found on other professional cameras of the day. Undern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Zeiss AG
Carl Zeiss AG (), branded as 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 multi-national 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 smal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autofocus
An autofocus (or 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 accuracy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax K100D Super
The Pentax K100D and similar Pentax K110D are 6-megapixel digital single-lens reflex cameras, launched in the U.S. on May 22, 2006. The K100D has a maximum resolution of 3008 x 2008, and can also down-sample to 2400 x 1600 and 1536 x 1024. The slowest metered shutter speed is 30 seconds and the fastest shutter is 1/4000 seconds. The K100D features a 6-megapixel CCD sensor, coupled with an analog-to-digital converter (ADC) and a sensor-based shake reduction system within the camera body. The K110D has exactly the same features as the K100D, except it lacks built-in shake reduction. The K100D is sometimes confused with the similarly named, but more advanced, Pentax K10D. The Pentax K200D, successor to the K100D and K100D Super, was officially announced on January 23, 2008. K100D Super On June 27, 2007, Pentax announced the K100D Super. It retains the features and the 6.1-megapixel image sensor of the K100D, while adding support for Supersonic Drive Motor(SDM) lenses and du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canon T80
The Canon T80 is Canon's first autofocus 35mm single-lens reflex camera. It was introduced in April 1985 and discontinued in June 1986 and is part of the T series of FD mount cameras. It is not compatible with Canon's later EOS system and its autofocus EF-mount lenses. Three special lenses, designated ''AC'', were produced specifically for the camera. Other FD-mount lenses can also be used, but without autofocus capabilities. Autofocus The autofocus system in the T80 works in the same manner as the focus assist system built into the earlier AL-1. A linear CCD is used to detect contrast in the focus area. When this area has the maximum contrast, the lens is in focus. This is a similar mechanism to that used in compact digital cameras. When a manual focus lens is used, the camera provides focus assistance in exactly the same manner as the AL-1. The autofocus lenses contain a motor, and electrical contacts in the lens mount connect this motor to the camera's circuits. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DC Motor
A DC motor is any of a class of rotary electrical motors that converts direct current (DC) electrical energy into mechanical energy. The most common types rely on the forces produced by induced magnetic fields due to flowing current in the coil. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor. DC motors were the first form of motors widely used, as they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor, a lightweight brushed motor used for portable power tools and appliances can operate on direct current and alternating current. Larger DC motors are currently used in propulsion of electric vehicle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultrasonic Motor
An ultrasonic motor is a type of piezoelectric motor powered by the ultrasonic vibration of a component, the stator, placed against another component, the rotor or slider depending on the scheme of operation (rotation or linear translation). Ultrasonic motors differ from other piezoelectric motors in several ways, though both typically use some form of piezoelectric material, most often lead zirconate titanate and occasionally lithium niobate or other single-crystal materials. The most obvious difference is the use of resonance to amplify the vibration of the stator in contact with the rotor in ultrasonic motors. Ultrasonic motors also offer arbitrarily large rotation or sliding distances, while piezoelectric actuators are limited by the static strain that may be induced in the piezoelectric element. One common application of ultrasonic motors is in camera lenses where they are used to move lens elements as part of the auto-focus system. Ultrasonic motors replace the noisier and ofte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lens Mount
A lens mount is an interface – mechanical and often also electrical – between a photographic camera body and a lens. It is a feature of camera systems where the body allows interchangeable lenses, most usually the rangefinder camera, single lens reflex type, single lens mirrorless type or any movie camera of 16 mm or higher gauge. Lens mounts are also used to connect optical components in instrumentation that may not involve a camera, such as the modular components used in optical laboratory prototyping which join via C-mount or T-mount elements. Mount types A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock (friction lock) type. Modern still camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body. Screw-threaded mounts are fragile and do not align the lens in a reliable rotational position, yet types such as the C-mount interface are still widely in us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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