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Sigma APO 100-300mm f4 EX DG HSM lens
Ilse Jurriën : September 18th 2005 - 22:22 CET
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SigmaSigma APO 100-300mm f4 EX DG HSM lens : Fast aperture telephoto zoom lens that provides excellent optical performance for Digital SLR cameras and film SLR cameras. This telephoto zoom lens provides a large f4 aperture at all focal lengths. The new multi layer lens coating and lens design reduce flare and ghosting, and also maintains minimal light-fall-off, superior peripheral brightness is ensured. New multi layer coating of this lens gives superb color performance whilst cutting down flare and ghosting caused by reflections from the digital image sensor. Two SLD glass elements are used in the front lens group and two in the rear lens group for superior correction of several aberrations for superior image quality throughout the entir
Sigma APO 100-300mm f4 EX DG HSM lensSigma f4 DG HSM lens
High optical performance is demonstrated throughout the entire zoom range. The Hyper Sonic Motor (HSM) ensures a silent, high-speed AF function as well as full-time manual focusing capability for Sigma, Canon, and Nikon-D mount lenses. An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood supplied and circular polarizing filters. Since focusing and zooming do not change its overall length, ease of handling and operation is assured. A rotating tripod mount can be conveniently detached if required.

Sigma f4 EX DG - APO Tele-Converter EX
High-speed focusing is possible when this lens is used with dedicated APO EX tele-converters (1.4x and 2x). With the optional APO tele-converter 1.4x EX, it works as AF zoom lens from 140mm to 420mm F5.6. With APO tele-converter 2.0x EX, it works as a manual focus zoom lens from 200mm to 600mm F8.

Sigma APO 100-300mm f4 - Specification
• Lens Construction 16 Elements in 14 Groups
• Angle of View 24.4 -8.2 degrees
• Number of Diaphragm Blades 9 Blades
• Minimum Aperture F32
• Minimum Focusing Distance 180cm
• Maximum Magnification 1:5
• Filter Size Diameter 82mm
• Dimensions Diameter 92.4mm X Length 226.5mm
• Weight 1440g
• Corresponding AF Mounts
• PENTAX SFX and SF7 cannot be used. [100-300mm F4 APO EX DG HSM]

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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