External links
- Sigma 8mm f/4 EX DG official page
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| Maker | Sigma Corporation |
|---|---|
| Technical data | |
| Focal length | 8mm |
| Diaphragm blades | 5 |
| Construction | 10 elements in 6 groups |
| Features | |
| Unique features | circular fisheye |
| Physical | |
| Filter diameter | rear (Gelatin filter) |
| Angle of view | |
| Horizontal | 180 |
| Vertical | 180 |
| Diagonal | 180 |
| History | |
| Successor | Sigma 8mm f/3.5 EX DG |
The Sigma 8mm f/4 EX DG is a photographic lens made by the Sigma Corporation. It is a circular fisheye lens for full-frame cameras, and has been replaced by the Sigma 8mm f/3.5 EX DG.
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The Four Thirds System is a standard created by Olympus and Eastman Kodak for digital single-lens reflex camera (DSLR) and mirrorless camera design and development.
Sigma Corporation 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 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 8mm f/3.5 EX DG is a photographic lens introduced on 9 August 2006. It is a circular fisheye lens, designed to project a 180-degree field of view in all directions onto a circular image when used on a full-frame camera. The lens is available in Canon, Nikon, and Sigma mounts.
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.
The Sigma 50mm f/1.4 EX DG HSM is a normal prime lens made by the Sigma Corporation.
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The Sigma 12-24mm f/4.5-5.6 EX DG HSM is a professional-level wide-angle zoom lens made by Sigma Corporation. At launch it was the widest rectilinear lens available for full-frame 35mm SLR cameras, providing a field of view of 122 degrees. It has since been surpassed by the Canon EF 11-24mm f/4L zoom lens and the Irix 11mm f/4, a manual focus prime lens. The Sigma 12-24 has low distortion even compared to less wide zooms like the Canon EF 16-35mm lens.
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 at advanced consumers.
The Sigma 105mm f/2.8 EX DG is a macro lens produced by Sigma Corporation. The lens has six different variates, fitting on the Sigma SA mount, Canon EF mount, Four Thirds System, Pentax K mount, Minolta A-mount, and the Nikon F-mount.
The Sigma 70-200mm f2.8 EX DG OS HSM is a camera lens produced by the Sigma Corporation.
The Sigma 35 mm f/1.4 DG HSM Art is a wide-angle prime lens made by the Sigma Corporation. The lens was announced at the 2012 photokina trade fair.
The Sigma 50mm f/1.4 DG HSM Art lens is a professional-level fixed focal length camera lens made by Sigma Corporation. It was announced at CES in January 2014 and immediately became highly anticipated amid reports that Sigma was not aiming to compete against Canon or Nikon's 50mm prime lenses but rather the newly released Zeiss Otus 55/1.4, a lens costing US$4,000. Retail prices for the Sigma 50mm lens had not yet been announced, but it was initially expected that it would sell for around US$1,350. However, when official pricing was announced on April 11, 2014, the retail price was even lower: US$950.
The Sigma 300 – 800 mm lens is a professional-level supertelephoto zoom lens made by Sigma Corporation from 2005 to 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. Due to its massive size and weight, the lens has been nicknamed the "Sigmonster"
The Sigma 24mm F1.4 DG HSM Art is an interchangeable wide angle lens for full frame cameras. It was announced by Sigma Corporation on February 10, 2015. A full two stops faster than most 24mm primes, it is designed to capture wide angle imagery with shallow depth of field, as one might with a medium or large format camera.
The Leica L-Mount is a bayonet mount developed by Leica Camera AG for interchangeable-lens autofocus digital cameras.