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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 .
The difference between the two types of lenses is that circle lenses are tinted not only in areas that cover the iris of the eye, but also prominently in the extra-wide outer rim of the lens. The result is the appearance of a bigger, wider iris with a limbal ring, creating an illusion of large eyes. [2]
The Sigma 4.5mm f/2.8 EX DC circular fisheye is a photographic lens manufactured by Sigma Corporation. It is a circular fisheye lens , designed to project a 180-degree field of view in all directions onto a circular image.
The Sigma 35 mm f / 1.4 DG HSM Art is a wide-angle prime lens made by the Sigma Corporation. [1] The lens was announced at the 2012 photokina trade fair. [2]The lens is produced in Canon EF mount, Nikon F-mount, Pentax K mount, Sigma's own SA mount, and the Sony/Minolta AF Mount varieties, all have the same optical formula.
Nine-blade iris Pentacon 2.8/135 lens with 15-blade iris Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades In the human eye, the iris (light brown) acts as the diaphragm and continuously constricts and dilates its aperture (the pupil) A 750nm titanium-sapphire laser beam passing through an iris diaphragm, while opening and closing the iris.
The Sigma SD14 is a digital single-lens reflex camera produced by the Sigma Corporation of Japan. It is fitted with a Sigma SA mount which takes Sigma SA lenses. The camera was announced on August 29, 2006 with a "teaser" advertising campaign [ 1 ] and was unveiled at the photokina trade show in Cologne , Germany on 2006-09-26. [ 2 ]
Keira Knightley’s number one reason for having no more kids isn’t the pain of childbirth or the endless nights of disrupted sleep.. On Monday, Dec. 9. the actress, 39, gushed about her two ...
The Sigma 70-300mm F4-5.6 APO DG Macro lens is a consumer-level, telephoto zoom lens made by Sigma Corporation. [1] 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 ...