The Sony E-mount 70mm f/2.8 DG Macro Art Lens from Sigma 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 increased clarity, sharpness, and color accuracy.  The physical design utilizes Thermally Stable Composite material for durability in a wide range of environments, and a brass bayonet mount also offers rigidity and mounting precision. Short-telephoto prime, this lens is designed for full-frame Sony E-mount mirrorless cameras, however, can also be used with APS-C models where it provides a 105mm equivalent focal length. Two aspherical elements are used to help limit distortion and spherical aberrations and also contribute to more excellent overall sharpness and accurate rendering. A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions. The lens is constructed using a Thermally Stable Composite (TSC) material and traditional metals for greater precision and use in wide temperature variations.