Sony A7R IV + SIGMA 24-70mm

Lens Highlights SIGMA 24-70mm Lens

Positioned as a workhorse lens among E-mount full-frame mirrorless systems from SONY, the SIGMA 24-70mm f/2.8 DG DN Art is a versatile wide-angle-to-vertical-length zoom characterized by its constant f/2.8 maximum aperture. The bright design is suited to working in available lighting conditions and also allows greater control over depth of field. The optical design incorporates a series of low-dispersion and aspherical elements that greatly reduce a variety of aberrations in order to achieve high sharpness, greater clarity and improved color accuracy. Both Super Multi-Layer and Nano Porous Coatings have also been applied to enhance contrast and color rendering by suppressing lens flare and ghosting when working in strong lighting conditions.

Complementing the optical attributes, this lens also features a stepping AF motor, which produces fast, accurate and remarkably quiet autofocus performance. At the wide end of the zoom range, a maximum magnification ratio of 1:2.9 is suited to working with close-up subjects and an 11-blade diaphragm contributes to a pleasing bokeh quality. In addition, a weather-sealed design benefits working in harsh environmental conditions.

• As part of the Art line within the Global Vision series from SIGMA, this lens is designed for truly remarkable optical performance and is ideal for creative and artistic applications.

• The standard zoom is designed for full-frame SONY E-mount mirrorless cameras, however, it can also be used with APS-C format models where it will provide an equivalent focal length range of 36-105mm.

• The constant f/2.8 maximum aperture is suitable for working in available light conditions and also provides greater control over depth of field when using shallow depth-of-field techniques.

• Six F low dispersion (FLD) and two special low dispersion (SLD) elements significantly reduce chromatic aberrations and color fringing throughout the zoom range for improved clarity and color accuracy.

• Three aspherical elements control spherical aberrations and distortion for increased sharpness and accurate rendering.

• Both Super Multi-Layer and Nano Porous Coatings have been applied to the lens elements in order to minimize lens flare and ghosting and help produce contrast-rich, color-neutral images, even in backlit conditions.

• The built-in stepping motor performs fast and quiet autofocusing, which is further complemented by an AF algorithm optimized to produce smoother focusing performance.

• At the wide-angle end of the zoom range, a minimum focusing distance of 7.1" is possible with a maximum magnification of 1:2.9 to accommodate close-up subject work. At the telephoto end, the minimum focus distance is 1.25' at a maximum magnification of 1:4.5.

• The built-in AF-L button can be programmed to adjust various shooting settings and the lens also features a dedicated AF/MF switch and zoom lock switch to prevent accidental barrel extension.

• The rounded 11-blade diaphragm contributes to a pleasing bokeh quality.

• The brass bayonet offers increased mounting precision and rigidity, and rubber sealing is incorporated into the mount design for dust and splash resistance.