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The SIGMA
APO 50-500mm F4-6.3 EX DG HSM High Magnification Zoom Lens with a 10x zoom ratio. Optimized for
digital SLR cameras.
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. Reduction of Flare and Ghosting
The advanced optical design is optimized for digital SLR cameras. In
addition, the new super coating on each glass surface produces superb color
rendition, while reducing flare and ghosting.
SLD glass for superior
optical performance
This lens uses four pieces of SLD (the special low dispersion) glass for
excellent correction of color aberration throughout the entire zoom
range.
HSM (Hyper Sonic Motor)
The HSM models (the HSM is only available for AF Canon, Nikon, Four Thirds
and Sigma Mounts) provide quiet high-speed AF function, as well as full time
manual focus capability.
APO Tele-Converter EX (optional)
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)
Easy Operation and Handling
This lens also features a Zoom Lock device to eliminate "Zoom Creep" when the
lens is tilted down. When the lens is set to the 50mm focal length, it is
remarkably compact and provides easy handling. The tripod mount is composed of
magnesium, to minimize total weight and also it is easy to grip and carry the
lens due to ergonomic design of the tripod mount.
Non-rotating front lens
elements, due to rear focus mechanism make possible the use of a custom bayonet
"Petal-type Hood", which prevents extraneous light from degrading the image
quality. This mechanism also allows the use of circular polarizing filters,
since the front barrel does not rotate during focusing or zooming.
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