Sigma has announced a new standard zoom lens, the Sigma 28-70mm f/2.8 DG DN | Contemporary, for mirrorless cameras with L and E mounts.
Angled view of the new Sigma 28-70mm f/2.8 DG DN lens without its lens hood. (Source: Sigma.)
Based on the design of the current 24-70mm f/2.8 DG DN | Art lens but with a shorter zoom range, the new lens claims to be the smallest and lightest in its class. Its optical design consists of 16 elements in 12 groups and includes three aspherical, two FLD and two SLD elements to provide corrections for axial chromatic aberration and sagittal coma aberration, which cannot be corrected in-camera. Super Multi-Layer Coating and Nano Porous Coating have been applied to minimise ghosting and flare. A water and oil repellent coating has been applied to the front element to help keep it free from grime. A 9-blade rounded diaphragm produces a circular aperture for attractive bokeh.
The new lens features just one lightweight focusing element, which keeps the AF unit small. This, along with a quiet and fast stepping motor, makes for responsive and near-silent autofocus performance. Focus modes include AF, DMF and AF+MF. The lens is made from TSC (Thermally Stable Composite), a type of polycarbonate with a similar level of thermal shrinkage to aluminium. This helps reduce differences between the thermal shrinkage of the metal and non-metal parts, ensuring stable levels of performance in environments with extreme temperature changes. It weighs only 470 grams, accepts 67 mm diameter filters and comes with a petal-shaped lens hood. It has ‘simple’ weather-resistant sealing.
The new lens is scheduled for release in March at an MSRP of US$899. Click here for more information.