The Sigma 17-50mm F2.8 EX DC HSM is a wide to standard zoom lens designed for APS-C DSLRs. Equipped with a Hyper Sonic Motor (HSM), the 17-50mm boasts a large fixed 2.8 aperture throughout the entire zoom range. 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.
|Lens Construction||17 Elements in 13 Groups|
|Angle of View||72.4º-27.9º|
|Number of Diaphragm Blades||7|
|Minimum Focusing Distance||28 cm / 11 in|
|Filter Size (mm)||77mm|
(Diameter x Length)
|83.5x91.8 mm/3.3x3.6 in|
|Weight||565g / 19.9oz.|
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.