The 28-70mm f/2.8 DG DN Contemporary Lens for Sony E-Mount from Sigma is a versatile wide-angle to portrait-length zoom characterized by its f/2.8 constant maximum aperture. The design suits working in available lighting conditions while affording increased control over depth of field. More lightweight and compact than similar 24-70mm lenses, it's optical design incorporates two FLD and two SLD low-dispersion elements plus three aspherical elements that reduce a variety of aberrations to achieve high sharpness, enhanced clarity, and improved color accuracy. It 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, an ideal combination for filmmakers looking for a high-performance, lightweight, and easy-to-handle camera system that works well with a gimbal or other accessories.
Each optical surface features Super Multi-Layer and Nano Porous coatings to improve contrast and color rendering by suppressing lens flare and ghosting for optimal light transmission, and an added water- and oil-repellent coating on the front optic helps keep the lens free from smudges and droplets. The weather-sealed design benefits working in trying environmental conditions, and a nine-blade rounded diaphragm contributes a pleasing bokeh quality when using wider apertures.
|Focal Length||28 to 70mm|
|Lens Mount||Sony E|
|Angle of View||75.4° to 34.3°|
|Minimum Focus Distance||7.5" / 19 cm|
|Maximum Magnification||3.3 to 4.6x|
|Optical Design||16 Elements in 12 Groups|
|Diaphragm Blades||9, Rounded|
|Filter Size||67 mm (Front)|
|Dimensions (ø x L)||2.8 x 4" / 72.2 x 101.5 mm|
|Weight||16.6 oz / 470 g|
|Package Weight||1.73 lb|
|Box Dimensions (LxWxH)||5.6 x 4.9 x 4.6"|