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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.
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.
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.
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.
The newly designed hypersonic motor (HSM) offers 1.3 times the torque of its predecessor. Even at low speeds, it offers exceptionally stable performance.
The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image.
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.
The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.
Weight | 10.000000 |
---|---|
Brand | Sigma |
MPN (Manufacurer product no) | 576954 |
Condition | New |
Lens Mount | Canon EF |
Lens Type | All-in-One Zoom |
Maximum Aperture | f/2.8 |
Optical Coatings | Super Multi-Layer Coating, water- and oil-repellent coating |
Lens Construction | 19 Elements in 14 Groups |
Lens Hood | Yes (Supplied) |
Aperture Blades | 9 (Rounded diaphragm) |
Aperture Range | f/2.8 - f/22 |
Min Focus Distance | 37cm / 15.0in. |
Auto Focus System | HSM |
Filter Size | 82mm |
Focal Length | 24-70mm |
Weight | 1,020g / 36 oz |
Dimensions | (Diameter x Length) 88mm x 107.6mm / 3.5in. x 4.2in. |
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