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The Sigma 50-200mm f/ 4- 5.6 DC OS HSM is a compact, high-performance telephoto zoom lens. It utilizes Sigma's own Optical Stabilizer function to elimiate the effects of camera shake so subjets can be easily and clearly seen in the cameras viewfinder in addition to the image. It allows the use of shutter speeds up to 4 stops slower than normal for steady, handheld photography. For Pentax cameras the built-in OS System allows the photographer to see the stabilized image in the viewfinder and can be used as an alternative with cameras having built-in image stabilization.
The lens incorporates SLD (Special Low Dispersion) glass in the front lens groups and is equipped with an inner focusing system to provide high image quality throughout the entire zoom range. The incorporation of HSM (Hyper-Sonic Motor) ensures quiet and high-speed auto focus.
The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images throughout the entire zoom range. This lens has a minimum focusing distance of 43.3inches (110cm) throughout the entire zoom range and a maximum magnification ratio of 1:4.5. An inner focusing system eliminates front lens rotation, making it suitable for use with circular polarizing filters.
Sigma's Own Optical Stabilization System
Inner Focusing System
Eliminates Front Lens Rotation; Suitable for Use with Circular Polarizing Filters
Compact Telephoto Zoom Lens
High performance in a small 2.9 x 4.0" package
High Image Quality
SLD Glass Elements with Inner Focusing
1:4.5 Magnification, Exclusively Designed for Digital SLRs
• Sigma 50-200mm f/4-5.6 DC OS HSM High Performance Telephoto Zoom For Pentax Cameras
• Bayonet Type Lens Hood