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Sigma 170-500mm F5-6.3 DG telephoto zoom
Mark Peters : November 25th 2005 - 16:42 CET
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SigmaSigma 170-500mm F5-6.3 DG telephoto zoom : Sigma Corporation is pleased to announce the launch of the new 170-500mm F5-6.3 DG lens. This compact ultra telephoto zoom lens covers a range up to 500mm. The new multi-layer lens coating and lens design reduces flare and ghosting, and creates an optimum color balance resulting in better picture quality through the entire zoom range on both film and digital SLRs. This lens uses one aspherical lens and three SLD (Special Low Dispersion) glass elements for excellent correction of chromatic aberration, making high-quality images a reality throughout the entire zoom range. Since the front of the lens does not rotate during focusing, a circular polarizing filter can easily be attached and used.
Sigma 170-500mm F5-6.3 DG telephoto zoom  Sigma 170-500mm lens specification
• Focal Length: 170-500mm F5-6.3DG
• Minimum Aperture: F32
• Filter Size: 86mm
• Construction: 13 Elements 11 Groups
• Angle of View: 14.5°- 5°
• Number of Diaphragm Blades: 9pcs
• Maximum Magnification: 1:6.6
• Lens Hood: Bayonet Type Hood
• Weight: 1345gr/47.4oz
• Focusing: 300-320cm (118.1-125.9”)
• Lens hood and tripod collar included
• Diameter 92.5mm x 232mm.

Available lens fittings
• Sigma AF
• Canon AF
• Nikon AF
• Pentax AF
• Konica Minolta AF

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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