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It is the first such lens to provide the complete circular fisheye effect on crop factor digital SLR cameras, which do not have a full 36x24mm sensor. [1] This lens is available in Canon, Nikon, Sigma, Pentax and Sony mounts. This lens projects a 13mm image circle, which fits nicely in a Micro Four Thirds system frame with an adapter.
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 .
A "slow" lens (one that is not capable of passing a lot of light through) might have a maximum aperture from 5.6 to 11, while a "fast" lens (one that can pass more light through) might have a maximum aperture from 1 to 4. Fast lenses are, by definition, larger than slow lenses (for comparable focal length), and typically cost more. [2]
The Sigma 12-24mm f/4.5-5.6 EX DG HSM is a professional-level wide-angle zoom lens made by Sigma Corporation. [1] At launch it was the widest rectilinear lens available for full-frame 35mm SLR cameras, providing a field of view of 122 degrees.
The Sigma 24mm f/1.8 EX DG is wide-angle lens which features a fast f/1.8 maximum aperture for use in low-light situations, and macro focusing capability to a ...
The Sigma 50-500mm f / 4-6.3 EX DG HSM is a super-telephoto zoom lens produced by Sigma Corporation. It contains four SLD (Special Low Dispersion) glass elements to provide correction for chromatic aberration. It is aimed at advanced consumers.
The lens assumes a crop factor of roughly 1.5, and therefore is not usable with on full-frame or 135 film cameras. In 2013, Sigma announced that the lens would be replaced by a redesigned model designated as the Sigma 30mm f / 1.4 DC HSM A; the new lens went on sale in March of that year in Canon, Nikon, and Sigma mounts. [1]
The L-Mount Alliance is an alliance between Leica Camera AG, Panasonic and Sigma, launched on 25 September 2018, whereby Panasonic and Sigma will make use of the L-Mount standard initially developed by Leica and will offer cameras and lenses utilising this lens mount with improved firmware and full compatibility among these Alliance products ...
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