Sigma Corporation add's a unique, anti-shake technology to their award-winning 17-70mm lens which now gives end-users world wide an " Ultimate standard lens " which is now available for Canon, Nikon, Pentax, Sony / Minolta and Sigma mounts.

This Semi-large aperture, standard zoom lens contains state-of-the-art enhancements, including the company's own Optical Stabilization (OS), anti-shake technology that offers the use of shutter speeds approximately four (4) stops slower than would otherwise be possible.

This lens' predecessor, the 17-70mm F2.8-4.5 DC Macro HSM, was deemed a "Best Buy" recommendation for photographers wishing to purchase a standard zoom lens as part of the Canadian Association for Photographic Art's (CAPA) "Best Lens of the Year" awards.

Three (3) aspherical lenses and one Extraordinary Low Dispersion (ELD) glass element provide excellent correction for all types of aberrations when shooting with this lens. Additionally, the Super Multi-Layer Coating reduces flare and ghosting to produce high-contrast images.

It has a 4x zoom range that is equivalent to 24-105mm lenses in full-frame formats.   That, coupled with the OS technology and a macro function, makes it the ultimate standard lens for serious photographers who want top-notch image quality and functionality at an affordable price.

• Lens Construction : 17 Elements in 13 Groups
• Angle of View : 72.4 - 20.2 degrees
• Number of Diaphragm Blades : 7 Blades
• Minimum Aperture : F22
• Minimum Focusing Distance : 22cm / 8.7 in.
• Maximum Magnification : 1:2.7
• Filter Size : Diameter 72mm
• Weight : 535 grams / 18.9 oz.
• Stabilized : Yes
• Macro feature : Yes
• Corresponding AF Mounts :
  • Sigma
  • Canon
  • Nikon (D)
  • Sony / Minolta (D)
  • Pentax
• Quiet and Fast Auto Focus : Yes

This Sigma 17-70mm F/2.8-4.0 DC Macro OS HSM retails more or less around $ 449.00 USD and you might be able to find discounted price during holiday season.

This Sigma lens is pretty much close to the Tamron 17-50mm F/2.8 VC lens which retails more or less around $ 649.00 USD which also happens to be a Stabilized equivalent lens.

There is also a close Canon original equivalent lens but, that would cost you a Leg or an Arm unless You have the extra Cash.