Sigma 70mm F/2.8 DG MACRO (A) for Sony E Key Features : EF-Mount Lens/APS-C Format 28.8-56mm (35mm Equivalent) Aperture Range: f/1.8 to f/16 Five SLD Elements Four Aspherical Elements Super Multi-Layer Coating Hyper Sonic Motor AF System Rounded 9-Blade Diaphragm Wide-to-normal zoom is designed for APS-C-format Canon EF-mount cameras and provides a 28.8-56mm equivalent focal length range. Impressively bright constant f/1.8 maximum aperture is well-suited for working in low-light conditions and also provides greater control over the focus position when using shallow depth of field techniques.