Sigma 17-50mm f/2.8 EX DC OS HSM

Sigma 17-50mm f/2.8 EX DC OS HSM

Lens Summary

Brand: Sigma

Also Known As: Sigma 17-50mm f/2.8 EX DC OS HSM

Lens Type: Zoom Lens

Format: APS-C / DX

Focus: Autofocus

Lens Mount: Canon EF, Nikon F, Sigma SA

Release Date: 2010-02-20

MSRP Price: $619

Made in: Japan

Infrared Rating: Good

Production Status: In Production

Lens Description: The Sigma Corporation is pleased to announce the new Sigma 17-50mm f/2.8 EX DC OS HSM. This large aperture standard zoom lens is designed for digital SLR cameras and incorporates Sigma\'s efficient OS function. It 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 f/2.8 throughout the entire zoom range, making it ideal for many types of photography such as portraiture and landscapes. The OS (Optical Stabilizer) function offers the use of shutter speeds approximately 4 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 (F Low Dispersion) glass elements, which have performance equal to fluorite glass, plus two glass mold and one hybrid aspherical lens, provide excellent correction for all type 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 HSM (Hyper Sonic Motor), the lens provides fast and quiet AF. 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 7 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.

Sigma 17-50mm f/2.8 EX DC OS HSM Specifications

Lens Specifications
Lens TypeZoom Lens
Focal Length17-50mm
Mount TypeCanon EF, Nikon F, Sigma SA
FormatAPS-C / DX
Compatible Format(s)Nikon DX FX in DX Crop Mode, Canon (APS-C)
Compatible with TeleconvertersNo
Zoom Ratio2.94x
Maximum Reproduction Ratio1:5
Optical Stabilization (Image Stabilization)Yes
Aperture Information
Aperture RingNo
Maximim Aperturef/2.8
Minimum Aperturef/22
Maximum Angle of View (APS-C or smaller format)72.4° - 27.9°
Optical Information
Lens Elements17
Lens Groups13
Diaphragm Blades7
Aspherical Elements2 FLD glass elements 2 glass mold elements 1 hybrid aspherical lens
Focus Information
Built-in Focus MotorYes
Internal FocusingYes
Minimum Focus Distance0.28m
Distance InformationYes
Filter Information
Filter Size77 mm
Accepts Filter TypeScrew-on
Physical Characteristics
Weather / Dust SealingNo
Mount MaterialMetal
Dimensions8.38 x 9.14cm
Other Information
Available in ColorsBlack

Lens Construction

Sigma 17-50mm f/2.8 EX DC OS HSM Lens Construction

MTF Chart

Sigma 17-50mm f/2.8 EX DC OS HSM Chart


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Kevin Pinkerton

I disagree with the infrared rating on this lens. I would consider it poor at best. It had hot spots pretty on just about all of the apertures and across all of the focal lengths. I was able to find one, perhaps two apertures at through out. But it was not consistent and I was not happy with playing a guessing game.


I wonder if you could recommend any other Nikon F-mount lens which is that fast and of good quality?