Combining outstanding optical performance, an F2.8 constant aperture and a light and compact body, the 28-70mm F2.8 is the ultimate portable standard zoom for mirrorless cameras.

This lens is ideal for photographers and videographers who need a high performance, all-in-one standard zoom that isn’t going to weigh them down.

The lens is highly versatile and is perfect for a wide range of photographic applications including landscapes, portraits, weddings, street, close-ups and architecture. It’s also ideal for video and light enough to be used on a small electronic gimbal.

• Two FLD Elements, Two SLD Elements
• Three Aspherical Elements
• Super Multi-Layer & Nano Porous Coatings
• Water- and Oil-Repellent Front Coating
• Stepping Motor AF System
• Rounded 9-Blade Diaphragm
• Dust- and Splash-Proof Design

The optical design includes two FLD, two SLD and three aspherical elements for staggering sharpness across the frame with very little in the way of unwanted aberrations.

Razor-sharp optics

The 28-70mm F2.8 DG DN | C delivers outstanding optical quality even on very high-resolution sensors. Optical performance is maintained across the whole frame, meaning fine detail is rendered perfectly right into the corners.

The lens has an advanced optical design made up of 16 elements in 11 groups, including 4 aspherical elements and 5 FLD elements. These ensure razor-sharp results and work with in-camera digital corrections to eliminate chromatic aberration, flare, distortion and vignetting.

The lens has advanced optical coatings which reduce flare and ghosting when working in bright direct sunlight – important on an ultra-wide-angle lens.

Perfect for portraits

The fast constant aperture creates a shallow depth-of-field that helps the subject to stand out from the background, making the lens perfect for portraits. The wider end of the focal range is best for environmental shots, with the tighter end perfect for a classic head-and-shoulders composition.

Superb low-light performance

The 28-70mm has constant, fast F2.8 aperture, which makes it a very useful lens for working hand-held in darker environments such as interiors, weddings and night scenes.

Internal focus mechanism

The lens has an internal focus mechanism, so the lens always remains the same length when the subject distance changes. This makes it well suited to gimbal use due to a relatively constant centre of gravity, and it also means the end of the lens doesn’t rotate when focusing – important when using filters.

Stepping motor

The lens has a stepping motor that delivers smooth, fast and accurate AF for both stills and video. It has been designed with lighter glass elements in the focus lens group, which ensures responsive autofocus that is fully compatible with all the latest AF camera technology.

Features and build

The outer barrel of the 28-70mm is constructed using a polymer called Thermally Stable Composite (TSC). This has a similar thermal expansion rate to aluminium, meaning that the metal interior of the lens and the TSC exterior behave in the same way as temperatures change. TSC is also light and strong, and has a sleek finish for a premium look.

The durable brass mount is surrounded by a rubber seal to help keep out dust and moisture.

Made in Japan

All Sigma cameras and lenses are designed, manufactured and assembled at their sole factory at Aizu in Japan. This domestic production model is unusual in today’s industry, with most imaging companies opting to outsource to other countries to reduce costs. But SIGMA believes that keeping virtually all manufacturing, processing and assembly in Aizu is essential for creating innovative, carefully thought-out and impeccably constructed products that meet the high standards demanded by professional photographers and film-makers around the world.