Art
24-70mm F2.8 DG OS HSM

• Camera Type

  DSLR

• Corresponding Mount

  SIGMA SA-mount, Canon EF mount, Nikon F mount

• Sensor Format

  Full-frame [DG]

• Lens Construction

  19 elements in 14 groups

• Angle of View

  84.1°­ - 34.3°

• Number of Diaphragm Blades

  9 (Rounded diaphragm)

• Minimum Aperture

  F22

• Minimum Focusing Distance

  37cm / 15in.

• Maximum Magnification Ratio

  1:4.8

• Filter Size

  φ82mm

• Dimensions (Diameter × Length)

  φ88mm × 107.6mm / φ3.5in. × 4.2in.

  *The length of a lens is measured from the filter surface to its mount.

• Weight

  1,020g / 36.0oz.

• Edition Number

  A017

  The three-digit code on the surface of the lens is to indicate the year the lens was first released.
  (Since it is different from the year of manufacture, the release year and edition number may not match depending on the mount.)

• Supplied Accessories

  ・Case
  ・LENS HOOD LH876-04
  ・FRONT CAP LCF-82mm III
  ・REAR CAP LCR II

• Mount / Product Barcode

  SIGMA SA-mount：00-85126-57656-1

  Nikon F mount：00-85126-57655-4

  Canon EF mount：00-85126-57654-7

• Camera Compatibility

  LINK

• *Values are for Sigma SA-mount
  *The Nikon mount version of this lens includes an electromagnetic diaphragm mechanism. Functionality may be limited on some camera bodies.
  *For Nikon F mount cameras, please see (*)Nikon camera compatibility

  (*)Nikon F mount camera compatibility

  Lenses for Nikon F mount with an electromagnetic diaphragm mechanism can be used with the following cameras.

  Z7Ⅱ※,Z7※,Z6Ⅱ※,Z6※,Z5※,Z50※,D6, D5, D4S, Df, D850, D810, D810A, D780, D750, D610, D500, D7500, D7200, D7100, D5600, D5500, D5300, D5200, D5100, D5000, D3500, D3400, D3300, D3200, D3100
  ※Can be used with the Nikon "Mount Adapter FTZ" attached

  Before using with one of the cameras listed below, please update the lens to the latest firmware version.
  D4, D3X, D3S, D3, D800, D800E, D700, D600, D300S, D300, D7000
  * The lens cannot be used with the cameras not listed above (including film single‐lens reflex cameras).

• The large-diameter standard zoom ideal for today’s ultra-high-megapixel digital cameras

  Sigma’s Art line: a focus on high resolution

  To fulfill the uncompromising image quality standard of the Art line, this lens features a power distribution that has been optimized in exacting detail. This is the lens for those who desire consistent resolution at maximum F2.8 brightness or lower and complete control of the beautiful bokeh effect.

• Outstanding optical performance

  Three SLD glass lens elements and four aspherical lens elements help minimize optical aberrations. To ensure outstanding image quality from the center to the edges of the photograph, the optical system minimizes coma, which causes points of light to streak, and transverse chromatic aberration, which cannot be corrected by adjusting the aperture. The optical system also minimizes distortion, which can be particularly evident in wide-angle shots, resulting in excellent optical performance throughout the zoom range.

• 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 F4 DG HSM | Art and Sigma 14mm F1.8 DG HSM | Art, which both incorporated large ⌀80mm aspherical lenses as their front lens element.

  Building on the success of these predecessors, the Sigma 24-70mm F2.8 DG OS HSM | Art incorporates an aspherical lens element that helps achieve extremely high resolution. This element is much thicker at the center 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 F2.8 DG OS HSM | Art to deliver a very natural and smooth bokeh effect, without the visible concentric rings that afflict typical aspherical lens elements.

• A 24-70mm F2.8 lens that meets the high standards of the Art line

  Sigma has continuously pioneered 24-70mm F2.8 lenses that are a step ahead of the times. The first model of this specification, Sigma 24-70mm F2.8 EX DG ASPHERICAL DF, launched in 2001. Representing the fourth generation of the family, the new Sigma 24-70mm F2.8 DG OS HSM | Art accomplishes a challenging feat in optical design: incorporating optical stabilizer 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.

• Exclusive low-dispersion glass

  The degree to which light is refracted by glass depends on the light’s wavelength. This fact causes different colors of light to focus at slightly different points. The result is chromatic aberration, the color fringing that is particularly noticeable in telephoto lenses. Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element. Yet residual chromatic aberration known as “secondary spectrum” may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, Sigma lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD (“F” Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite. Meticulous deployment of these types of exclusive low-dispersion glass and optimization of power distribution gives Sigma lenses superlative image rendition undiminished by residual chromatic aberration.

  

• Designed to minimize flare and ghosting

  From the start of the design process, Sigma measured flare and ghosting to establish an optical design that is resistant to strong incidental light sources such as backlight. At the prototyping stage, Sigma used not only simulations but actual photographic experiments to assess flare and ghosting under multiple criteria, identify the causes of these issues under a wide range of situations, and take measures to mitigate them. In addition, Sigma’s Super Multi-Layer Coating helps further reduce flare and ghosting and provide sharp, high-contrast images even in backlit conditions.

  

• OS and other features for success on any shoot

  OS functionality, newly designed HSM, mount with dust and splash resistant structure, electromagnetic aperture control (for Nikon), and more

  This lens has all the features and functions photographers need to be successful on a wide variety of shoots. In addition to outstanding image quality, this lens offers autofocus, construction that minimizes the incursion of dust and debris, an optical stabilizer (OS) function, and more. To make this lens as easy to use as possible by photographers in all fields, it features not only Sigma’s most advanced mechanical systems but also the company’s latest software.

  

• Incorporating the OS function for success on any shoot

  Designed for use in a wide variety of situations, the optical stabilizer (OS) offers a powerful stabilization effect of 4 stops*.

  * Based on CIPA guidelines. Measured at the telephoto setting on a camera with a 35mm full-size 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 F2.8 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 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.

• Newly designed HSM for fast AF performance

  The newly designed hypersonic motor (HSM) offers 1.3 times the torque of its predecessor. Even at low speeds, it offers exceptionally stable performance.

• 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

  Full-time manual focus function allows the lens to be switched to manual focus simply by rotating the focus ring.

  Note: The operation of full-time MF may vary based on mount type.

• Mount with Dust and Splash Resistant Structure

  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-repellant coating that helps the lens perform well in the rain, near water, and in other challenging conditions.

  * Except for Sigma mount

• Rounded diaphragm

  The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image.

  

• High-precision, rugged brass bayonet mount

  The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.

  

Lens construction

SLD glass

Aspherical lens

• Spatial frequency

  S:Sagittal Line

  M:Meridional Line

• 10lp/mm

• 30lp/mm

Diffraction MTF

Diffraction MTF

Geometrical MTF

Geometrical MTF

• F2.8

• F5.6

• F11