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Sigma Press Release
50-500mm F4-6.3 EX DG/HSM
High Magnification Ultra Telephoto Zoom Lens, with a 10x zoom ratio from 50mm to 500mm, optimized for digital SLR cameras.
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. 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.
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）
THE 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)
The appearance and specifications are subject to change without notice.
Posted by Darren in our Accessories category on May 20, 2005