|Founded||Setagaya, Japan (September 1961 )|
|Headquarters||Asao-ku, Kawasaki, Kanagawa 215-8530, Japan|
Number of employees
Sigma Corporation (株式会社シグマ, Kabushiki-gaisha Shiguma) is a Japanese company, manufacturing cameras, lenses, flashes and other photographic accessories. All Sigma products are produced in the company's own Aizu factory in Bandai, Fukushima, Japan. Although Sigma produces several camera models, the company is best known for producing high-quality lenses and other accessories that are compatible with the cameras produced by other companies.
The company was founded in 1961 by Michihiro Yamaki, who was Sigma's CEO until his death at age 78 in 2012.
Sigma products work with cameras from Canon, Nikon, Pentax, Sony, Olympus and Panasonic, as well as their own cameras.
Sigma has also made lenses under the Quantaray name, which have been sold exclusively by Ritz Camera. Similarly, Sigma lenses were sold exclusively by the former Wolf Camera, but following the merger of Wolf and Ritz, both brands can be purchased.
Sigma's digital SLRs, the SD9, SD10, SD14 and SD15, plus the latest SD1 are unusual in their use of the Foveon X3 image sensor. The company's mirrorless cameras, the Sigma SD Quattro and SD Quattro H, use the Foveon Quattro sensor, an updated version of the Foveon X3. All use the SA lens mount. The Sigma DP series of high-end compact P&S cameras also use the Foveon Quattro sensor, which gives them a much larger sensor than other cameras of this type.
In September 2018 Sigma became one of the founding members of the L-Mount Alliance; it announced that it will cease to develop SA-mount cameras and instead use Leica's L-Mount. A new full-frame mirrorless camera, Sigma FP, was launched in 2019 along with a range of L-Mount lenses and adapters.
Sigma is the world's largest independent lens manufacturer and is a family-owned business.
Sigma has made a number of film SLR cameras, including the SA-300, SA-5, SA-7 and SA-9. Their latest consumer digital SLR is the SD15. During photokina 2010, Sigma announced a new flagship DSLR camera, the SD1. SD1 features a new 46MP Foveon X3 sensor with 1.5x crop, as opposed to the 1.7x crop of previous models.
All Sigma SLR, DSLR, and mirrorless cameras use the Sigma SA mount, which is mechanically similar to the Pentax K mount and electrically an adaptation of the Canon EF lens mount lens control system.
Sigma also produces the DP series of high-end compact digital cameras. The Foveon APS-C sized sensors are similar to those used in the DSLR line. The current line makes use of the Quattro sensor, a variant of the Foveon design that has a higher resolution top layer and lower resolution lower layers combined into a final image that is claimed to be equivalent to a 39 megapixel color filter array image. The four compact cameras are differentiated by their fixed prime lens, with the ultra wide DP0, the wide DP1, the normal DP2 and the telephoto DP3.
In February 2016, Sigma announced two new mirrorless cameras—the SD Quattro and SD Quattro H. Both cameras use the full-depth Sigma SA mount, allowing the use of existing SA-mount lenses, and also use Foveon Quattro sensors. The SD Quattro uses an APS-C sensor with 19.6 MP in the top layer, while the SD Quattro H uses an APS-H (1.35x crop) sensor with 25.5 MP in the top layer. The company claims that the Foveon Quattro technology produces a level of detail equivalent to that of a Bayer sensor with twice the pixel count.
Sigma produces the Sigma Photo Pro software for post-production of their camera's .X3F raw image format. It is available both for Mac OS and Microsoft Windows.
Sigma makes autofocus lenses for the Sigma SA, Canon EF, Nikon F, Minolta/Sony α, Pentax K and Four Thirds lens mounts. Each lens may not be available in all mounts, and may lack certain features (such as HSM) on certain mounts.
In August 2013, Sigma announced that starting the following month, it would offer a mount conversion service for its newest "Global Vision" lenses—those with either an "A" (Art), "C" (Contemporary), or "S" (Sport) as part of their model name. For a cost that varies with lens and market—from $80 to $250 in the U.S., not including shipping costs—owners can send their lenses to their local Sigma company, which in turn sends them to Japan for mount replacement, including calibration and optimization for the new camera system. Lenses designed for DSLRs can be converted to Canon EF, Nikon F, Pentax K, Sigma SA, or Sony A mounts; those designed for MILCs can be converted to Micro Four Thirds or Sony E-mount.
In 2011, Nikon filed a suit against Sigma, alleging it had violated patents relating to Nikon's "Vibration Reduction" image stabilisation technology.In 2015, the suit ended through settlement, with no details disclosed.
Tamron Co., Ltd. is a Japanese company manufacturing photographic lenses, optical components and commercial/industrial-use optics. Tamron Headquarters is located in Saitama City in the Saitama Prefecture of Japan.
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.
The Sigma 30mm f/1.4 EX DC HSM is a wide-aperture photographic lens made by the Sigma Corporation, equipped with Hyper Sonic Motor. The lens was produced in Canon EF mount, Four Thirds System, Nikon F-mount, Pentax K mount, the SA mount, and the Sony/Minolta AF Mount varieties, all of the same optical formula. It shipped with a removable petal-type lens hood. The lens assumes a crop factor of roughly 1.5, and therefore is not usable with on full-frame or 135 film cameras.
The Sigma 70-300mm F4-5.6 APO DG Macro lens is a consumer-level, telephoto zoom lens made by Sigma Corporation. Different versions of this lens are produced that work with cameras from Canon, Nikon, Pentax, Konica Minolta, Sony and Sigma. Additionally, Olympus' 70–300 f/4–5.6 lens for Four-Thirds has the same optical design and specifications as this lens. The lens is packaged with a lens hood.
Cosina Voigtländer refers to photographic products manufactured by Cosina under the Voigtländer name since 1999. Cosina leases rights to the Voigtländer name from RINGFOTO GmbH & Co. ALFO Marketing KG in Germany. Cosina Voigtländer products have included 35mm film SLR and rangefinder camera bodies, and lenses for the M39 lens mount, M42 lens mount, Leica M mount, and other lens mounts.
The Sigma 50mm f/1.4 EX DG HSM is a normal prime lens made by the Sigma Corporation.
The Sigma 150mm f/2.8 APO Macro EX DG HSM is a telephoto macro prime lenses made by the Sigma Corporation.
The Sigma 18-50mm f/2.8 EX DC Macro is a wide to normal angle, zoom lens made by the Sigma Corporation.
The Sigma 12-24mm f/4.5-5.6 EX DG HSM is a professional-level wide-angle zoom lens made by Sigma Corporation. It was once the widest rectilinear lens available for full-frame 35mm SLR cameras, providing a field of view of 122 degrees. It is still the widest full-frame rectilinear lens available for Nikon as of 2016. This distinction has been taken over by the Irix 11mm f/4 lens released in 2017. However, the Sigma lens still remain the widest autofocus full-frame zoom lens available for Nikon camera as the Irix lens is a manual focus prime lens. Other lenses available with focal lengths of 12mm or less are either incompatible with full-frame cameras or are intentionally distorted. The Sigma 12-24 has low distortion even compared to less wide zooms like the Canon EF 16-35mm lens.
The Sigma APO 120-400mm F4.5-5.6 DG OS HSM lens is a super-telephoto lens produced by Sigma Corporation. It contains three SLD glass elements to provide correction for chromatic aberration. It is aimed toward advanced consumers.
The Sigma APO 150-500mm F5-6.3 DG OS HSM lens is a super-telephoto lens produced by Sigma Corporation. It contains three SLD glass elements to provide correction for chromatic aberration. It is aimed toward advanced consumer level photographers, and is available in Nikon, Canon, Pentax and Sigma camera mounts.
The Sigma APO 180mm F3.5 EX DG lens is a telephoto/macro lens produced by Sigma Corporation. It contains two SLD glass elements to provide correction for chromatic aberration. It is aimed toward advanced consumers
The Sigma 50-500mm f/4-6.3 EX DG HSM is a super-telephoto zoom lens produced by Sigma Corporation. It is commonly known as the "Bigma" because of its long and heavy body. It contains four SLD glass elements to provide correction for chromatic aberration. It is aimed toward advanced consumers.
The 18-50mm f/2.8-4.5 DC OS HSM is a wide-angle zoom lens produced by Sigma Corporation. The lens has four different variates, fitting on the Canon EF mount, Pentax K mount, Minolta A-mount, and the Nikon F-mount. It features internal focusing and internal zooming, as well as two SLD elements and three aspherical lenses.
The Sigma 8–16mm lens is an enthusiast-level, ultra wide-angle rectilinear zoom lens made by Sigma Corporation specifically for use with APS-C small format digital SLRs. It is the first ultrawide rectilinear zoom lens with a minimum focal length of 8 mm, designed specifically for APS-C size image sensors. The lens was introduced at the February 2010 Photo Marketing Association International Convention and Trade Show. At its release it was the widest viewing angle focal length available commercially for APS-C cameras. It is part of Sigma's DC line of lenses, meaning it was designed to have an image circle tailored to work with APS-C format cameras. The lens has a constant length regardless of optical zoom and focus with inner lens tube elements responding to these parameters. The lens has hypersonic zoom autofocus.
The Sigma 70-200mm f2.8 EX DG OS HSM is a camera lens produced by the Sigma Corporation.
The Sigma 300 – 800 mm lens is a professional-level supertelephoto zoom lens made by Sigma Corporation since 2005 till 2019 for use with digital SLRs. It is a modification of the non-DG model Sigma 300-800mm F5.6 EX APO IF HSM was being in production in 2003-2005.
The Leica L-Mount is a bayonet mount developed by Leica Camera AG for interchangeable-lens autofocus digital cameras.