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Sigma DC lenses for Four Thirds mount
Ilse Jurriën : February 26th 2006 - 04:35 CET
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SigmaSigma DC lenses for Four Thirds mount : Sigma Corporation - manufacturer of lenses and cameras - is pleased to announce the launch of two new lenses for Four Thirds System. The Sigma 30mm F1.4 EX DC HSM lens and the Sigma 18-50mm F2.8 EX DC lens. These Sigma lenses are designed to maximize the potential of the digital imaging, and housed in a compact and lightweight construction. Our lens line-up for Four-Thirds mount is increased to total eight models with the introduction of these new lenses. The Sigma 30mm EX DC HSM lens is the standard prime lens, designed for digital cameras with large aperture F1.4. The Sigma 18-50mm EX DC lens is a F2.8 large aperture standard zoom lens designed specifically for Four Thirds system.
Sigma DC lenses for Four Thirds mountSigma 30mm F1.4 EX DC HSM lens
This is the standard prime lens specifically designed for the digital cameras with large aperture F1.4. SLD (Special Low Dispersion) and ELD (Extraordinary Low Dispersion) glass elements are used to obtain the best possible correction for chromatic aberration of magnification, which is a critical problem for the digital imaging. From 40cm (15.75”) minimum focusing distance to infinity, this lens creates very sharp images with high contrast. The HSM (Hyper Sonic Motor) provides quiet high-speed auto-focus shooting, as well as full-time manual focus. Large maximum aperture of F1.4 can perform superbly in a great range of applications, including snapshots, portrait, and landscape photography. With Four-Thirds cameras, the angle of view will be equivalent to 60mm.

Sigma 18-50mm F2.8 EX DC lens
F2.8 large aperture standard zoom lens designed specifically for Four Thirds system. This zoom lens is exclusively designed to ensure compact and lightweight construction as well as provides the utmost correction against lateral chromatic aberration, which is a critical problem for digital SLR cameras. This lens is specially coated to get the best color balance whilst cutting down flare and ghost caused by reflections from the digital image sensor. It has the best correction for vignetting and superior peripheral brightness is ensured. With Four-Thirds cameras, the angle of view will be equivalent to 36-100mm.

Sigma 30mm F1.4 EX DC HSM - Specification
• Mount Type : Four Thirds
• Minimum Aperture : F16
• Lens Construction : 7 Elements in 7 Groups
• Angle of View : 39.6°
• Number of Diaphragm Blades : 8pcs
• Minimum Focusing Distance : 40cm (15.75”)
• Maximum Magnification : 1-10.4
• Filter Size : 62mm
• Lens Hood : Petal Hood
• Dimensions : Diameter 77.8mm (3.1”)X Length 63.9mm (2.5”)
• Weight : 410g / 14.5oz

Sigma 18-50mm F2.8 EX DC - Specification
• Mount Type : Four Thirds
• Minimum Aperture : F22
• Lens Construction : 15 Elements in 13 Groups
• Angle of View : 62.0°-24.4°
• Number of Diaphragm Blades : 7pcs
• Minimum Focusing Distance : 28cm (11.03”)
• Maximum Magnification : 1-5
• Filter Size : 67mm
• Lens Hood : Petal Hood
• Dimensions : Diameter 70.2mm (2.8”)X Length 89.5mm (3.5”)
• Weight : 460g / 16.2oz

About Sigma
∑ SIGMA is the Greek letter equivalent to the English letter "S." In mathematics, it's a sign used to show the total sum. For photographers everywhere, Sigma is the total sum of the research, development, manufacturing and service of the world's leading line of lenses and cameras. Sigma ensures a high, consistent level of quality by processing our own high-performance Special Low Dispersion glass (SLD), metal and resins, surface treatments and other elements right here inside the factory itself. Sigma coordinates the development, production and sales of its technology worldwide through an impressive network of offices in Japan, the United States, Germany, France, United Kingdom, the Benelux countries, Hong Kong and Singapore.

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