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Sigma APO 135-400mm telephoto zoom lens
Ilse Jurriën : November 14th 2005 - 23:45 CET
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SigmaSigma APO 135-400mm telephoto zoom lens : Sigma Corporation is pleased to announce the launch of the new APO 135-400mm F4.5-5.6 DG lens. This compact ultra-telephoto zoom lens is optimized for digital SLR cameras. The new multi layer lens coating and lens design reduce flare and ghost, and also creates an optimum color balance and better picture quality through the entire zoom range. This lens uses one aspherical lens and three SLD (Special Low Dispersion) glasses for excellent correction of various chromatic aberrations. It provides excellent image quality for digital and film SLR cameras. Rear focus system ensures high performance stability and ease of use.
Sigma APO 135-400mm telephoto zoom lensSigma lens features:
The new multi layer lens coating and lens design reduce flare and ghosting. An aspherical lens and SLD glass elements provide correction for all types of aberration throughout the entire zoom range. And the rear focus system ensures fast AF speed. Since the front of the lens does not rotate during focusing, a circular polarizing filter can be easily attached and use. A removable tripod collar is included with the lens as a standard component.

Sigma 135-400mm lens specification:
• Focal Length : 135-400mm
• Minimum Aperture : F32
• Lens Construction : 13 Elements in 11 Groups
• Angle of View : 18.2°- 6.2°
• Number of Diaphragm Blades : 9pcs
• Minimum Focusing Distance : 200-220cm (78.7-86.6")
• Maximum Magnification : 1:5.3
• Filter Size : 77mm
• Lens Hood : Bayonet Type Hood
• Dimensions : Diameter 88.5mm (3.5") x Length 183.6mm (7.2")
• Weight : 1245gr/43.9oz

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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