Sigma 17-50mm f2.8 EX DC HSM

The Sigma 17-50mm F2.8 EX DC OS HSM is a wide to standard zoom lens designed for APS-C DSLRs. Equipped with a Hyper Sonic Motor (HSM) and an Optical Stabilizer (OS), the 17-50mm boasts a large fixed 2.8 aperture throughout the entire zoom range. An OS allows for easier handheld shooting while the HSM ensures quick, accurate and consistent autofocusing. FLD glass elements (with performance equal to fluorite) along with two glass mold elements and one hybrid aspherical lens provide excellent correction of aberrations and allow for incredibly sharp images with great contrast. Super Multi-Layer coating reduces flare and ghosting while the lightweight and compact construction make it a necessary addition to any camera bag.

SPECIFICATIONS

Lens Construction	17 Elements in 13 Groups
Angle of View	72.4º-27.9º
Number of Diaphragm Blades	7
Mininum Aperture	f22
Minimum Focusing Distance	28 cm / 11 in
Filter Size (mm)	77mm
Maximum Magnifications	1:5
Dimensions (Diameter x Length)	83.5x91.8 mm/3.3x3.6 in
Weight	565g / 19.9oz.
Corresponding Mounts	Sigma OS  HSM EX  DC  Nikon OS  HSM EX  DC  Canon OS  HSM EX  DC  Sony/Minolta HSM EX  DC  Pentax HSM EX  DC
OS - Optical Stabilizer Function HSM - Hyper-Sonic Motor EX - EX Lens DC - DC for Digital *Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras. * For Pentax mount, if the camera body does not support HSM, auto focus will not be available. * OS function is not available for Sony and Pentax mounts. *The appearance, specifications, and the like of the product may be subject to change for improvement.

MTF CHART

LENS CONSTRUCTION