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Sigma APO 180mm F3.5 EX DG HSM lens introduction
Mark Peters : May 19th 2005 - 00:15 CET
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SigmaSigma APO 180mm F3.5 EX DG HSM lens introduction : Sigma is pleased to announce the launch of the new APO 180 F3.5 EX DG HSM lens. This telephoto macro lens provides life-size reproduction and it is optimized for digital cameras. The new multi-layer lens coating reduces flare and ghost, which is a common problem with digital cameras. Two SLD glass elements ensure high optical performance for film SLR cameras as well as digital SLR cameras. The floating inner-focus system features two moving lens groups, which ensures that the lens’s physical length remains unchanged. This design also maintains great correction for Spherical Aberration and Astigmatism, and provides extremely high optical performance throughout its entire focus range.
Sigma APO 180mm F3.5 EX DG HSM lens introductionSigma 180mm F3.5 HSM lens
The HSM models (Sigma, Nikon-D and Canon) provides fast, silent AF function as well as full-time manual focus. The Sigma 180mm lens also features a Focus Limiter Switch, which provides a more efficient and positive AF function. The 1.4x EX teleconverter allows the photographer to use the new APO 180 F3.5 EX DG HSM lens as a 252mm F5 lens (Auto Focus is available between infinity to 1.2m with Canon, Sigma and Nikon mounts only. For macro work at distances closer than 1.2m the lens automatically changes to MF mode. The 1.4x EX teleconverter can only work in MF mode for Minolta and Pentax cameras. If 2X EX teleconverter is attached , this lens can be used as 360mm F7 MF for all mounts.

Sigma APO 180mm F3.5 lens - Specifications
• Focal Length :180mm
• Minimum Aperture :F32
• Lens Construction :13 Elements in 10 Groups
• Angle of View :13.7°
• Number of Diaphragm Blades :9pcs
• Minimum Focusing Distance :46cm(18.1”)
• Maximum Magnification :1:1
• Filter Size :72mm
• Lens Hood :Bayonet Hood
• Dimensions :Diameter 80mm (3.1”) x Length 182mm (7.1”)
• Weight :965gr/34oz
• Fittings :Sigma, Canon, Nikon-D, Pentax and Konica/Minolta
• Suggested retail price :£549.99

   Sigma DG EX tele lenses introduction
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