Product Description
The performance and functionality that pros in all fields require
What photographers demand from the 24-70mm F2.8 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 stabilizer (OS) with powerful
stabilization effect, dust- and splash-proof mount with rubber sealing, and a
metal barrel for a stable, rigid feel. This all-new 24-70mm F2.8 lens from SIGMA
delivers the performance and functionality that help pros succeed in news,
nature, and many other fields of photography.
Art line delivers high-level artistic expression
SIGMA is organizing all its interchangeable lenses into three product lines:
Contemporary, Art, and Sports, each with a distinctive concept. Designed with a
focus on sophisticated optical performance and abundant expressive power, our
Art line lenses deliver high-level artistic expression. Offering astonishing
rendering performance that meets the highest standard, they are perfect for
landscapes, portraits, still-lifes, close-ups, and casual snaps. They are made
for the kind of photography that unleashes the inner artist. A powerful ally in
every genre of photography, SIGMA's Art line lenses excel both in the studio for
formal works and outdoors for impressive shots of architecture, starry skies,
and many other scenes.
SIGMAs 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.
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.
Incorporating advanced aspherical lens processing technology
Aspherical lenses necessitate refined expertise in the design and
manufacturing of advanced, high-performance lenses. SIGMAs 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.
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