Sigma 24-70mm f/2.8 DG OS HSM | A

Sigma's full-frame kit lens for the Art series generation...

Sigma 24-70mm f/2.8 DG OS HSM | A

Sigma 24-70mm f/2.8 DG OS HSM | A

Fancy a full-frame kit lens that delivers Art series quality results? Sigma’s latest could be for you. The new 24-70mm f/2.8 features HSM, OS, dust- and splash-proof construction and provides an ideal focal length range for reportage, wildlife and weddings. This is the fourth incarnation of Sigma’s 24-70mm lens, but the first to introduce 21st century spec. Price and availability is still to be confirmed.

www.sigma-imaging-uk.com

Press release:

The definitive large-diameter standard zoom lens for any shoot
What photographers demand from the 24-70mm f/2.8 specification is much more than outstanding image quality. They want all the features that make this a go-to lens for a wide range of photographic opportunities, including optical design ideal for the latest ultra-high-megapixel digital cameras, HSM (Hyper-Sonic Motor) for high-speed autofocus, OS (Optical Stabiliser) with powerful stabilisation effect, dust- and splash-proof mount with rubber sealing, and a metal barrel for a stable, rigid feel. This all-new 24-70mm f/2.8 lens from Sigma delivers the performance and functionality that help pros succeed in news, nature, and many other fields of photography.

Key features

Outstanding optical performance
Three SLD (Special Low Dispersion) glass lens elements and four aspherical lens elements help minimise optical aberrations. To ensure outstanding image quality from the centre to the edges of the photograph, the optical system minimises coma, which causes points of light to streak, and transverse chromatic aberration, which cannot be corrected via aperture control, The optical system also minimises distortion, which can be particularly evident in wide-angle shots, resulting in excellent optical performance throughout the zoom range.

24-70mm f/2.8 lens that meets the high standards of the Art line
Sigma has continuously pioneered 24-70mm f/2.8 lenses that are a step ahead of the times. The first model of this specification, Sigma 24-70mm f/2.8 EX DG Aspherical DF, launched in 2001. Representing the fourth generation of the family, the new Sigma 24-70mm f/2.8 DG OS HSM | Art accomplishes a challenging feat in optical design: incorporating optical stabiliser functionality in a large-diameter standard zoom. By leveraging all of its design and manufacturing expertise, Sigma has ensured that this new lens fulfils the uncompromising requirements of the Art line for image and build quality.

Bokeh that is a cut above
At wide-open aperture, this lens offers outstanding photographic expression. The area in focus is extremely sharp, while the background exhibits a beautiful bokeh effect with only slight spherical aberration. Since large-diameter zoom lenses are often used at wide-open aperture, Sigma has paid close attention to the shape of the bokeh, aiming for perfect circularity.

Incorporating advanced aspherical lens processing technology
Aspherical lenses necessitate refined expertise in the design and manufacturing of advanced, high-performance lenses. Sigma’s representative products to feature this technology were the Sigma 12-24mm f/4 DG HSM | Art and Sigma 14mm f/1.8 DG HSM | Art, which both incorporated a large 80mm aspherical lens as their front lens element. Building on the success of these predecessors, the Sigma 24-70mm f/2.8 DG OS HSM | Art incorporates an aspherical lens element that helps achieve extremely high resolution. This element is much thicker at the centre than the edges, and forming its unusual shape is a feat of manufacturing technology. Moreover, Sigma processes the surface of this aspherical lens element with ultra-precise tolerances that are measured in hundredths of a micrometer. This extremely fine surface allows the Sigma 24-70mm f/2.8 DG OS HSM | Art to deliver a very natural and smooth bokeh effect, without the visible concentric rings that afflict typical aspherical lens elements.

OS functionality and newly designed HSM for success on any shoot
Designed for advanced utility in a wide variety of situations, the optical stabiliser OS (Optical Stabiliser) offers a powerful stabilisation effect. The newly designed large hypersonic motor HSM (Hyper-Sonic Motor) offers 1.3 times the torque of its predecessor and exceptionally stable performance even at lower speeds.

Lens barrel designed for high rigidity
Since large-diameter standard zoom lenses tend to serve as a go-to lens and see frequent use, the Sigma 24-70mm f/2.8 DG OS HSM | Art is designed to stand up to the challenging shooting environments that pros encounter. To this end, the lens barrel contains a large amount of metal, while the external moving parts feature TSC (Thermally Stable Composite), which is resistant to thermal expansion and contraction. This structure contributes not only to the outstanding optical performance of the lens but also to its high rigidity and confidence-inspiring build quality.

Other features

Mount with dust- and splash-proof design
Since the area of the lens most vulnerable to dust and other foreign bodies is the mount, rubber sealing helps provide peace of mind. In addition, the front lens element features a water- and oil-repellent coating that helps the lens perform well in the rain, near water, and in other challenging conditions.

Nikon electromagnetic diaphragm mechanism included
The Nikon mount version of this lens includes an electromagnetic diaphragm mechanism that allows it to receive the appropriate signals from the camera body. This feature ensures precision diaphragm control and stable Auto Exposure (AE) performance during continuous shooting.

  • Fast AF with full-time manual focus
  • Designed to minimise flare and ghosting
  • High-precision, durable brass bayonet mount
  • Rounded diaphragm
  • Evaluation with Sigma’s own MTF measuring system “A1”
  • The lens barrel is engraved with the year of release
  • Compatible with Mount Converter MC-11
  • Available Sigma USB Dock
  • Makes customisation and flexible adjustment possible
  • Available Mount Conversion Service