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Jun Hirakawa
Mr. Jun Hirakawa is a Japanese lens designer best known for creating the Pentax Pentax FA 43mm Limited lens, FA 43mm Limited and Pentax FA 77mm Limited lens, FA 77mm Limited lenses during his time at Pentax. Hirakawa said at the time that he regretted his "early retirement" from Pentax in 2010, around the time that Hoya Corporation, Hoya acquired the company, and was subsequently hired by Tamron. List of credited lens designs Hirakawa is credited with designing: * Pentax DA 10-17mm lens, DA 10-17mm f/3.5-4.5 Fisheye (co-developed with Takayuki Ito) * Pentax DA 14mm lens, DA 14mm f/2.8 * Pentax DA 40mm lens, DA 40mm f/2.8 Limited (based on the smc PENTAX-M 1:2.8 40mm) * DA 50-200 f/4-5.6 * Pentax DA 55-300mm lens, DA 55-300 f/4-5.8 * Pentax DA* 55mm lens, DA* 55mm f/1.4 * Pentax F 17-28mm lens, F 17-28mm f/3.5-4.5 Fisheye * F 35-80mm f/4-5.6 * F* 600mm f/4 * FA 28-105mm f/4-5.6 * Pentax FA 28mm lens, FA 28mm f/2.8 AL * FA 28mm f/2.8 SOFT * Pentax FA 35mm lens, FA 35mm f/2 * Pentax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax FA 43mm Limited Lens
The Pentax smc FA 43mm F1.9 Limited is a normal prime lens for Pentax 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 be .... It has also been sold as an Leica S-mount version in Japan. Referenceswww.dpreview.com External links * {{Pentax K-mount lenses 43 ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax DA* 55mm Lens
The smc Pentax-DA* 55mm f/1.4 SDM lens is a professional prime lens for the Pentax K-mount. It is designed for portrait use with a 35mm equivalent focal length In photography, the 35 mm equivalent focal length is a measure that indicates the angle of view of a particular combination of a camera lens and film or sensor size. The term is popular because in the early years of digital photography, m ... of 82.5mm. The lens features weather sealing, an SDM ultrasonic motor for quiet autofocus, and has 9 rounded diaphragm blades for smoother bokeh. Autofocus speed is similar to an equivalent screwdrive lens.http://www.digitalcamerareview.com/default.asp?newsID=3916&review=pentax+da+55mm DigitalCameraReview: Pentax DA* 55mm f/1.4 SDM Lens Review References External links *SMC Pentax-DA* 55mm f/1.4 SDM {{DEFAULTSORT:Pentax DA 55mm lens [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Industrial Designers
Japanese may refer to: * Something from or related to Japan, an island country in East Asia * Japanese language, spoken mainly in Japan * Japanese people, the ethnic group that identifies with Japan through ancestry or culture ** Japanese diaspora, Japanese emigrants and their descendants around the world * Japanese citizens, nationals of Japan under Japanese nationality law ** Foreign-born Japanese, naturalized citizens of Japan * Japanese writing system, consisting of kanji and kana * Japanese cuisine, the food and food culture of Japan See also * List of Japanese people * * Japonica (other) * Japonicum * Japonicus * Japanese studies Japanese studies (Japanese: ) or Japan studies (sometimes Japanology in Europe), is a sub-field of area studies or East Asian studies involved in social sciences and humanities research on Japan. It incorporates fields such as the study of Japanese ... {{disambiguation Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax People
is a brand name used primarily by the Japanese multinational imaging and electronics company Ricoh for DSLR cameras, lenses, sport optics (including binoculars and rifle scopes), and CCTV optics. The Pentax brand is also used by Hoya Corporation for medical products & services, TI Asahi for surveying instruments, and Seiko Optical Products for certain optical lenses. Corporate history Early history The company was founded as Asahi Kogaku Goshi Kaisha in November 1919 by Kumao Kajiwara, at a shop in the Toshima suburb of Tokyo, and began producing spectacle lenses (which it still manufactures). In 1938 it changed its name to , and by this time it was also manufacturing camera/cine lenses. In the lead-up to World War II, Asahi Optical devoted much of its time to fulfilling military contracts for optical instruments. At the end of the war, Asahi Optical was disbanded by the occupying powers, being allowed to re-form in 1948. The company resumed its pre-war activities, manufa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Engineers
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of optical instruments, instruments that use or Photodetector, detect it. Optics usually describes the behaviour of visible light, visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the Classical electromagnetism, classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of Ray (optics), rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax FA* 85mm Lens
is a brand name used primarily by the Japanese multinational imaging and electronics company Ricoh for DSLR cameras, lenses, sport optics (including binoculars and rifle scopes), and CCTV optics. The Pentax brand is also used by Hoya Corporation for medical products & services, TI Asahi for surveying instruments, and Seiko Optical Products for certain optical lenses. Corporate history Early history The company was founded as Asahi Kogaku Goshi Kaisha in November 1919 by Kumao Kajiwara, at a shop in the Toshima suburb of Tokyo, and began producing spectacle lenses (which it still manufactures). In 1938 it changed its name to , and by this time it was also manufacturing camera/cine lenses. In the lead-up to World War II, Asahi Optical devoted much of its time to fulfilling military contracts for optical instruments. At the end of the war, Asahi Optical was disbanded by the occupying powers, being allowed to re-form in 1948. The company resumed its pre-war activities, manufa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax FA 35mm Lens
is a brand name used primarily by the Japanese multinational imaging and electronics company Ricoh for DSLR cameras, lenses, sport optics (including binoculars and rifle scopes), and CCTV optics. The Pentax brand is also used by Hoya Corporation for medical products & services, TI Asahi for surveying instruments, and Seiko Optical Products for certain optical lenses. Corporate history Early history The company was founded as Asahi Kogaku Goshi Kaisha in November 1919 by Kumao Kajiwara, at a shop in the Toshima suburb of Tokyo, and began producing spectacle lenses (which it still manufactures). In 1938 it changed its name to , and by this time it was also manufacturing camera/cine lenses. In the lead-up to World War II, Asahi Optical devoted much of its time to fulfilling military contracts for optical instruments. At the end of the war, Asahi Optical was disbanded by the occupying powers, being allowed to re-form in 1948. The company resumed its pre-war activities, manufa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax FA 28mm Lens
is a brand name used primarily by the Japanese multinational imaging and electronics company Ricoh for DSLR cameras, lenses, sport optics (including binoculars and rifle scopes), and CCTV optics. The Pentax brand is also used by Hoya Corporation for medical products & services, TI Asahi for surveying instruments, and Seiko Optical Products for certain optical lenses. Corporate history Early history The company was founded as Asahi Kogaku Goshi Kaisha in November 1919 by Kumao Kajiwara, at a shop in the Toshima suburb of Tokyo, and began producing spectacle lenses (which it still manufactures). In 1938 it changed its name to , and by this time it was also manufacturing camera/cine lenses. In the lead-up to World War II, Asahi Optical devoted much of its time to fulfilling military contracts for optical instruments. At the end of the war, Asahi Optical was disbanded by the occupying powers, being allowed to re-form in 1948. The company resumed its pre-war activities, manufa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax F 17-28mm Lens
The smc Pentax-F 17–28mm Fish-eye 3.5–4.5 is the first fisheye lens, fisheye zoom lens, manufactured by Pentax for single-lens reflex cameras (SLRs) with a Pentax K-mount, K lens mount. At its widest setting of 17mm, it affords a 180° diagonal angle of view images for all K-mount full-frame SLR cameras; at 28mm, the diagonal angle of view is reduced to 90° on the diagonal. Typical fisheye barrel distortion is evident at all focal lengths. A successor model, the Pentax DA 10-17mm lens, was introduced with the same view angles and closer focusing capability for APS-C cameras in 2006. History and design The lens was designed by Jun Hirakawa and a patent was applied for the design in 1994, granted in 1998. Longtime photography writer Herbert Keppler was a noted fan of the lens, as its unique zoom capabilities allow the user to minimize the appearance of barrel distortion. Keppler wrote in an informal review "You don't use this lens to make your best girl- or boyfriend look prett ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax DA 55-300mm Lens
The HD Pentax DA 55-300mm lens, is a telezoom lens line for the Pentax K-mount. There are 4 generations so far. The first generation was the SMC Pentax-DA 55-300mm F4-5.8 ED, green side band. It was produced from 2008 to 2013. That lens design was additionally released with a plastic mount plate as the SMC Pentax-DA L 55-300mm F4-5.8 ED with a silver side band. This began in 2010 and is still in production. The next release of this lens is the HD Pentax DA 55-300mm F4.0-5.8 ED WR, red side band, released in 2013. This upgraded the lens to HD coating, offering improved transmittance and reduced aberrations. It was also the first generation to have weather sealing. The optical formula was unchanged. The 55-300mm lens was finally completely overhauled in 2016 and made about a third of a stop slower throughout the zoom range, and even more so at the long end. This version has a built-in Pulse Motor (PLM) for quieter, faster and more accurate autofocus, and a retractable desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax FA 77mm Limited Lens
The smc Pentax-FA 77mm f/1.8 Limited is a prime lens for Pentax K-mount aimed at portrait photography. It was voted "Greatest Pentax Lens of All Time" at Pentaxforums.com. It is one of the three FA Limited lenses (the other two being the smc Pentax-FA 43mm f/1.9 Limited and smc Pentax-FA 31mm f/1.8 Limited) in Pentax lens line up. They share superbly machined aluminium construction, exclusively designed lens hoods and slip-on caps, a very comfortable to use depth of field scale, an emerald dot to line up with the lens release button on the camera (making it convenient to switch lenses in the dark) and excellent optical performance (especially at the time of launch.) These lenses are hand made and are available in black or silver finish. History Pentax released the lens in 1999, two years after the FA 43mm Limited, the first lens in their Limited series. More than 20 years after its launch it is still in production, although, probably to maintain cost efficiency, manufacturing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentax DA 40mm Lens
DA 40mm f/2.8 Limited The smc Pentax-DA 40mm f/2.8 Limited is a pancake lens for the Pentax K-mount. At only long, it was the smallest lens made by Pentax until the 40mm XS lens was introduced. The lens has a 35mm equivalent focal length of 60mm; it is part of the Limited series of high-performance compact lenses. In August 2013 it was re-released with improved lens coatings and rounded aperture blades as HD Pentax-DA 40mm f/2.8 Limited. DA 40mm f/2.8 XS The SMC Pentax-DA 40mm f/2.8 XS is an even thinner version of the SMC DA 40mm lens, at thick, released by Pentax on February 2, 2012. It features an aesthetic design by Marc Newson to match the Pentax K-01. It is currently one of the thinnest autofocus pancake lenses ever made. File:Pentax K-01(White×Black).jpg, DA 40mm f2.8 XS mounted on 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, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
