Sigma 24-70mm f/2.8 DG OS HSM Art Lens (Canon EF)

Sigma 24-70mm f/2.8 DG OS HSM Art Lens (Canon EF Mount)
The Sigma 24-70mm f/2.8 DG OS HSM Art is a professional-grade standard zoom lens engineered for full-frame Canon EF-mount DSLRs, while also serving as a highly effective 38.4-112mm equivalent lens on APS-C cropped sensor bodies. As a flagship member of Sigma’s highly decorated Global Vision Art series, this optic is designed to deliver exceptional resolution, color neutrality, and artistic rendering. By combining a fixed, ultra-bright f/2.8 constant aperture with physical optical stabilization and a rugged, dust- and splash-resistant build, it stands as the definitive daily workhorse for commercial sets, portrait sessions, weddings, and fast-paced photojournalism.

CONDITION NOTE
Well-Used / Physical Blemish on Glass / Fully Functional: This lens is in well-used cosmetic condition, exhibiting visible signs of active field employment across the exterior barrel and rubber rings.

Front Element Scratch: The front glass element features a noticeable physical scratch.

Optical Impact Test: Extensive testing confirms that this scratch does not appear in images or degrade performance, even when stepped down completely to f/22. Light transmission, contrast tracking, and micro-contrast remain fully intact.

Accessories Included: Ships complete with standard front and rear lens caps, alongside its original dedicated matching plastic lens hood. It is a solid, mechanically sound production tool offered at a steep discount due to its cosmetic history.

Constant f/2.8 Art Series Optical Architecture
Fixed f/2.8 Exposure Uniformity: Features a constant f/2.8 maximum aperture, maintaining uniform exposure settings and light transmission across the entire 24-70mm zoom range. This allows for absolute control over shallow depth-of-field separation and subject isolation.

Elite Special Low Dispersion (SLD) Glass: Outfitted with three premium SLD glass elements that aggressively neutralize chromatic aberrations and color fringing, ensuring high color accuracy and pristine edge-to-edge clarity.

Four Aspherical Elements: Incorporates four advanced aspherical glass elements to suppress spherical aberrations, geometric coma, and distortion, producing lifelike rendering and uniform sharpness.

Super Multi-Layer Coating: Internal optical groups feature Sigma’s multi-layer anti-reflective treatment to combat lens flare and ghosting, securing contrast-rich files when working under harsh studio lighting or direct midday sun.

Fluorine-Coated 9-Blade Diaphragm: Features a rounded nine-blade diaphragm constructed from durable polycarbonate with a carbon feather film. This guarantees smooth, stable aperture tracking during rapid continuous high-speed bursts while rendering creamy out-of-focus highlights.

4-Stop Optical Stabilization & HSM Autofocus
4-Stop Optical Stabilizer (OS): Built-in hardware image stabilization counteracts handheld camera shake by up to four stops, allowing you to execute sharp, handheld exposures at significantly slower shutter speeds under difficult low-light conditions.

Hyper Sonic Motor (HSM): Driven by an upgraded, ultrasonic coreless AF motor paired with an optimized tracking algorithm to deliver rapid, near-silent, and pinpoint focus tracking for both high-resolution stills and fluid video acquisition.

Full-Time Manual Focus Override: Offers instantaneous manual focus adjustments simply by rotating the tactile physical focus ring at any time, eliminating the need to physically toggle the AF/M switch on set.

Professional Weather-Sealed Construction
Thermally Stable Composite (TSC) Barrel: Crafted utilizing highly advanced TSC materials alongside traditional aircraft-grade metals, ensuring structural precision, rigid durability, and internal alignment stability across extreme ambient temperature variations.

Precision Brass Bayonet Mount: Built with a solid, heavy-duty brass bayonet mount for exceptional structural rigidity and accurate alignment with the camera body.

Dust- and Splash-Resistant Sealing: The lens mount is integrated with a rugged rubber weather-seal ring to safeguard the camera sensor and electronic contacts against encroaching dust, grit, and moisture on location.

Water- & Oil-Repellent Front Coating: The outermost surface of the front glass element features a specialized protective coating that repels water, fingerprints, and oil smudges, making it easy to wipe down in harsh environments.

Sigma USB Dock Compatibility: Fully compatible with the optional Sigma USB Dock, allowing you to connect the lens to a computer to fine-tune focus calibration profiles, adjust manual override behaviors, and update internal firmware.

Technical Specifications
Focal Length Range: 24-70mm (38.4-112mm Equivalent on Canon APS-C Sensors)

Aperture Range: f/2.8 to f/22

Lens Mount Type: Canon EF (Full-Frame & APS-C Compatible)

Filter Thread Diameter: 82mm

Minimum Focus Distance: 1.21′ (37 cm)

Maximum Magnification Ratio: 1:4.8

Lens Construction: 19 Elements in 14 Groups

Weight: Approx. 35.9 oz (1,020 grams)