The Sigma 28-70mm f/2.8 DG DN Contemporary Lens for Sony E-Mount stands out as a versatile wide-angle to portrait-length zoom, distinguished by its constant f/2.8 maximum aperture. Tailored for full-frame E-mount mirrorless cameras, this lens excels in diverse shooting scenarios, especially in challenging lighting conditions, providing enhanced depth-of-field control. Its compact and lightweight design, in comparison to similar 24-70mm lenses, is complemented by a sophisticated optical construction featuring two FLD and two SLD low-dispersion elements, as well as three aspherical elements. These elements work harmoniously to mitigate aberrations, resulting in images characterized by high sharpness, improved clarity, and accurate color reproduction.

The lens’s optical system incorporates a single lightweight focusing element, contributing to the lens’s compact size. Teamed with a responsive and near-silent stepping motor, this lens ensures quick and quiet autofocus performance—an ideal combination for filmmakers seeking a high-performance yet lightweight camera system compatible with gimbals and other accessories.

Optical Brilliance

Super Multi-Layer and Nano Porous coatings on each optical surface enhance contrast and color rendering by effectively suppressing lens flare and ghosting. An additional water- and oil-repellent coating on the front optic maintains a clean lens surface, free from smudges and droplets.

Versatile Design Features

The weather-sealed construction of this lens makes it a reliable companion in challenging environmental conditions. The nine-blade rounded diaphragm contributes to a pleasing bokeh quality, particularly when using wider apertures.

Key Specifications

• Standard zoom for full-frame E-mount mirrorless cameras
• 42-105mm equivalent focal length on APS-C cameras
• Constant f/2.8 maximum aperture for low-light versatility and depth-of-field control
• Two F Low Dispersion (FLD) and two Special Low Dispersion (SLD) elements minimize chromatic aberrations and color fringing
• Three aspherical elements control spherical aberrations and distortion
• Super Multi-Layer and Nano Porous coatings reduce lens flare and ghosting, producing contrast-rich and color-neutral imagery
• Integrated stepping motor and optimized AF algorithm for quick and quiet autofocus
• Minimum focus distance of 7.5″ at 28mm (1:3.3 magnification) and 15″ at 70mm (1:4.6 magnification)
• Brass bayonet for precise mounting accuracy and rigidity
• Rubber sealing ensures dust- and splash-resistance

In summary, the Sigma 28-70mm f/2.8 DG DN Contemporary Lens combines optical excellence, user-friendly features, and a robust design, making it an ideal choice for photographers and filmmakers seeking a versatile, high-performance lens for Sony E-mount mirrorless cameras.