Just ahead of CP+, Sigma has added to its other lens announcements this morning by taking the wraps off the new 70mm F2.8 DG Macro Art lens.
With a 1:1 reproduction ratio, this is the first true macro lens to join the Sigma Art series. It's been designed to prioritise optical performance above all else, with an extending, floating, two-group focus mechanism configured to minimise aberration.
The lens uses a focus-by-wire system, which eliminates a direct mechanical connection between the focus ring and the focus drive. Sigma’s algorithms, together with a new coreless DC motor, do the job of acquiring focus with minimal noise, while full-time manual focus is also available during autofocus. This is ideal for macro shooters who may need to adjust focus to the millimetre, a function that's further aided by the focus ring’s large angle of rotation.
The lens is constructed of 13 elements in 10 groups, and it uses a nine-bladed rounded diaphragm to create vivid bokeh. The optical design 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, as well as two aspherical lens elements specifically for close shooting. According to Sigma, all of this adds up to a lens capable of razor-sharp, well-delineated focus with beautiful bokeh.
Encased in a dust- and splash-proof body, the 70mm F2.8 DG Macro is also compatible with specific functionality of the corresponding cameras. So, the Sony E-mount version can work with Sony’s continuous AF, for example, together with in-camera stabilisation and lens aberration correction, while the Canon-mount version is compatible with Canon’s Lens Aberration Correction functionality.
Pricing for the new lens is yet to be announced, and there's no word on availability yet either. Keep an eye on Sigma’s official page for updates.