Sigma 28-70mm F2.8 DG DN | C | Leica Fit

A standard zoom that won't weigh you down /

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 mirror-less cameras. With a similar optical design to the 24-70mm F2.8 DG DN | Art, but significantly smaller and lighter at only 56% of its weight, the lens is ideal for photographers and videographers who need a high performance, all-in-one standard zoom that isnt going to weigh them down. At the point of release the 28-70mm was smallest and lightest standard zoom with a constant F2.8 aperture on the market for full-frame mirrorless cameras.

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

True to the core concept of the Contemporary line, the 28-70mm F2.8 DG DN delivers the perfect balance of performance and portability.

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 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 doesnt rotate when focusing important when using filters.

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. 

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

Razor-sharp optics /

Despite weighing only 450g, the 16-28mm 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.