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Sigma teleconverters
Jasper Huitink : October 6th 2005 - 06:50 CET
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SigmaSigma teleconverters : Today Sigma officials announced two new tele-converter lenses: the APO tele converter 1.4x EX DG and APO tele converter 2x EX DG. Both have a multi-layer lens coating to reduce flare and ghosting, which will not effect the quality of the other lens in use and high speed auto focus is retained when the converters are used. Digitally optimized tele-converters, exclusive to Sigma’s telephoto and telephoto zoom lenses. New multi layer lens coating and lens design reduce flare and ghosting. The high image quality of the master lens will not be compromised thanks to this new design concept. High-speed Auto Focus is retained even when these tele-converters are utilized.
Sigma teleconvertersSigma APO converter - Lens coating
The Sigma APO tele converter 1.4x EX DG and Sigma APO tele convertor 2x EX DG. These two dedicated Sigma corporation APO tele-converters are mounted between specific lenses and the camera body to increase the focal length by the power of 1.4 or 2. These digitally optimized tele-converters employ the latest lens coating technology to reduce both flare and ghosting. A combination of these dedicated tele-converters and specific DG lenses ensure the best possible performance.

Sigma APO tele converter 1.4x EX DG - Specifications
• Lens Construction: 3 Groups - 5 Elements
• Focal Length: 1.4 times of master lens
• Aperture Range: F2.8-32
• Magnification: 1.4 times of master lens
• Dimensions: 68.5mm - 19.5mm
• Weight: 160g

Sigma APO tele convertor 2x EX DG - Specifications
• Lens Construction: 5 Groups - 6 Elements
• Focal Length: 2 times of master lens
• Aperture Range: F2.8-32
• Magnification: 2 times of master lens
• Dimensions: 68.5mm - 52mm
• Weight: 235g

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