Sigma 70mm f2.8 DG Macro Art Lens – Canon EF Mount
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Optimized for notable image clarity at close working distances, the Sigma 70mm f2.8 DG Macro Art Lens is a true 1:1, life-size macro lens well-suited for close-up and macro subjects. As a member of the esteemed Art series of lenses, this short-telephoto prime is also distinguished by its sophisticated optical design that makes use of two FLD elements, two SLD elements, one anomalous partial dispersion/high refractive index element, and two aspherical elements to limit both chromatic and spherical aberrations for high clarity, sharpness, and color accuracy. A Super Multi-Layer Coating also enhances image quality by suppressing lens flare and ghosting for improved contrast and color fidelity in strong lighting conditions. Additionally, a rounded nine-blade diaphragm contributes to a pleasing bokeh quality.
Features of the Sigma 70mm f2.8 DG Macro Art Lens
- Aperture Range: f/2.8 to f/22
- Two FLD Elements, Two SLD Elements
- Low Dispersion and Aspherical Elements
- Super Multi-Layer Coating
- 1:1 Magnification, 10.2″ Min. Focus
- Coreless DC AF Motor, Manual Override
- Weather-Sealed, Brass Bayonet Mount
- Rounded 9-Blade Diaphragm
- Compatible with Sigma USB Dock
Top-level performance at every shooting distance
In order to realize top-level performance at every shooting distance, the Sigma 70mm f2.8 DG Macro Art Lens features an extending, floating, two-group focus mechanism. This configuration minimizes aberration to produce optimal results at any focus distance. To minimize axial chromatic aberration, the optical system incorporates two FLD glass elements, two SLD glass elements, and one element with a high rate of anomalous partial dispersion and a high index of refraction. In addition, two aspherical lens elements help increase resolution at close shooting distances. This optical system makes possible a razor-sharp in-focus area contrasted with a bokeh area free of color streaking.
Designed to minimize flare and ghosting
From an early stage in the Sigma 70mm f2.8 DG Macro Art Lens design process, flare and ghosting have been measured to establish an optical design resistant to strong incident light sources such as backlighting. SIGMA’s Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions. The included lens hood can be attached to block out extraneous light, which can have a negative effect on rendering performance.
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.
Fast AF with full-time manual focus
Full-time manual focus function allows the Sigma 70mm f2.8 DG Macro Art 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
The Sigma 70mm f2.8 DG Macro Art Lens mount incorporates rubber sealing to protect the mount from dust and water drops.
* Except for SIGMA mount
The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image.
Specifications of the Sigma 70mm f2.8 DG Macro Art Lens
|Lens Mount||Canon EF|
|Lens Format Coverage||Full-Frame|
|Angle of View||34.3°|
|Minimum Focus Distance||10.16″ / 25.8 cm|
|Macro Reproduction Ratio||1:1|
|Optical Design||13 Elements in 10 Groups|
|Diaphragm Blades||9, Rounded|
|Filter Size||49 mm (Front)|
|Dimensions (ø x L)||2.79 x 4.17″ / 70.8 x 105.8 mm|
|Length at Maximum Extension||4.16″ / 105.57 mm|
|Weight||1.13 lb / 515 g|
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