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Sigma AF 17-50mm f2.8 EX DC OS HSM Lens

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 Product Description

It incorporates Sigma's efficient Optical Stabilization (OS) function and is a compact lens with an overall length of just 3.6 inches. This lens covers a focal length from 17mm wide angle and offers a large aperture of F2.8 throughout the entire zoom range, making it ideal for many types of photography such as portraiture and landscapes. 

The OS function offers the use of shutter speeds approximately four stops slower than would otherwise be possible. For Sony and Pentax mount, the built-in OS function of this lens can be used even if the camera body is equipped with an image sensor shift anti-shake system. As compensation for camera shake is visible in the viewfinder, the photographer can easily check for accurate focus and ensure there is no subject movement. 

Two FLD glass elements, which have performance equal to fluorite glass, plus two glass mold and one hybrid aspherical lens, provide excellent correction for all types of aberrations. The Super Multi-Layer Coating reduces flare and ghost. This lens has superior peripheral brightness and provides sharp, high-contrast images even at the maximum apertures. High image quality is assured throughout the entire zoom range. 

Incorporating Hyper Sonic Motor (HSM), the lens provides fast and quiet auto focus. The lens has a minimum focusing distance of 11 inches throughout the entire zoom range and a maximum magnification ratio of 1:5. 

The rounded seven-blade diaphragm creates an attractive blur to the out of focus images. The inner focusing system eliminates front lens rotation, making the lens particularly suitable for use with the supplied petal-type lens hood and circular polarizing filters.

Key Features
- Designed for use with APS-C Size Sensors
- 4 Stops of Anti-Shake (OS) Compensation
- Aperture of f/2.8 throughout Zoom Range
- Accepts 77mm Filters
- Ultra Compact (Only91.8mm Long)
- Multi-Layered Lens Coating
- Excellent Correction for Aberrations
- Hyper-Sonic Motor for Quiet/Fast AF
- Close Focusing Distance of (28cm)

 Warranty Information

Brand :Sigma
Lens type :Zoom lens
Max Format size :APS-C/DX
Focal Length :17 - 50 mm
Image stabilisation :Yes (4 stops)
Lens mount :Canon EF, Nikon F (DX), Pentax KAF, Sony Alpha, Sigma SA
Maximum Aperture :F2.8
Minimum aperture :F22.0
Diaphragm Blades :7
Elements :17
Groups :13
Minimum Focus :28 cm
Autofocus :Yes
Motor Type :Ultrasonic
Weight :565 g
Diameter :84 mm
Length :92 mm
Filter Thread :77 mm

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