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Sigma 50-500mm F4-6.3 EX DG HSM lens
Mark Peters : May 19th 2005 - 23:00 CET
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SigmaSigma 50-500mm F4-6.3 EX DG HSM lens : Sigma Corporation is pleased to announce the launch of the new 50-500 F4-6.3 EX DG HSM lens. This high zoom ratio lens is optimized for digital SLR cameras and capable of covering a wide range of focal lengths from 50mm standard to 500mm ultra telephoto. This ultra-zoom lens employs a seven-group zoom system, which provides a high zoom magnification of 10x. Triple-cam Rear Focusing System ensures high precision throughout the whole focus range. The new lens coating reduces flare and ghost, which is a common problem of digital cameras and also creates an optimum color balance. This lens uses four pieces of SLD (the special low dispersion) glass for excellent correction of color aberration.
Sigma 50-500mm F4-6.3 EX DG HSM lensSigma ultra-telephoto zoom lens
A zoom lock switch eliminates 'zoom creep' during transportation, a convenient addition when traveling. The HSM (Hyper Sonic Motor) models provide quiet high-speed AF function, as well as full-time manual focus capability., The rear focus mechanism produces a non-rotating front lens element which accepts a bayonet “Petal-type Hood”, which prevents extraneous light from degrading the image quality.

Sigma 50-500mm - APO teleconverter
By adding an APO teleconverter (sold separately), you can use this lens as a 140-700mm F7.3-8.8 MF ultra-telephoto zoom lens with a 1.4X EX teleconverter, or as a 200-1000mm F10.4-12.6 MF ultra-telephoto zoom lens with a 2X teleconverter. (Teleconverters can be used in 100mm - 500mm focal length range)

Sigma 50-500mm F4-6.3 EX DG HSM lens - Specifications
• Focal Length : 50-500mm
• Minimum Aperture : F22
• Lens Construction : 20 Elements in 16 Groups
• Angle of View : 46.8°- 5°
• Number of Diaphragm Blades : 9pcs
• Minimum Focusing Distance : 100cm –300cm(39.3”-118.1”)
• Maximum Magnification : 1:5.2
• Filter Size : 86mm
• Lens Hood : Petal Hood
• Dimensions : Diameter 95mm (3.7”) x Length 218.5mm (8.6”)
• Weight : 1842gr/64.9oz
• SRP : £899.99
• Fittings : Sigma, Canon and Nikon-D, (Konica/Minolta and Pentax TBA)

   Sigma DG EX tele lenses introduction
   Sigma APO 180mm F3.5 EX DG HSM lens introduction
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