New from Sigma: 24-70mm f/2.8 DG OS HSM

The new weather sealed 24-70mm f/2.8 DG OS HSM zoom lens from Sigma offers optical stabilisation, 9 rounded aperture blades and is made out of a combination of metal and “thermally stable composite” material. The lens incorporates three super low dispersion (SLD) and four aspherical elements. The latest Sigma 24-70mm has a minimum focussing distance of 37cm and fits 82mm filters.

Key Features

Outstanding optical performance
Advanced aspherical lens processing technology
OS functionality and newly designed HSM
Mount with dust- and splash-proof design
Nikon electromagnetic diaphragm mechanism included
Fast AF with full-time manual focus
Designed to minimise flare and ghosting
High-precision, durable brass bayonet mount

SIGMA 24-70mm F2.8 DG OS HSM Art - extended

PRICE AND AVAILABILITY TO BE CONFIRMED

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Press Release

SIGMA 24-70mm f/2.8 DG OS HSM
Top-level performance optimised for the era of ultra-high-megapixel cameras

The large-diameter standard zoom is ideal for today’s ultra-high-megapixel digital cameras
OS functionality and newly designed HSM for success on any shoot
Lens barrel designed for high rigidity

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, hypersonic motor (HSM) for high-speed autofocus, optical stabiliser (OS) 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 glass lens elements and four aspherical lens elements help minimise optical aberrations. To ensure outstanding image quality from the center 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.

A 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 Aspehrical 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 fulfills 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 first 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 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 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 OS offers a powerful stabilisation effect. The newly designed large HSM offers 1.3 times the torque of its predecessor and exceptionally stable performance even at lower speeds.

_{* Based on CIPA’s guideline. Measuring at telephoto end, when it is attached to the camera with 35mm image sensor.}

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 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 thermally stable composite (TSC), 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.

_{Note: Functionality may be limited on some camera bodies.}